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IBM System Storage DS3512

Product ID: DS3512 – 1746A2D

IBM System Storage DS3512 Express Dual Controller Storage System:

Includes 6 gigabits per second (Gbps) serial-attached SCSI (SAS) systems to deliver mid-range performance and scalability at entry-level prices
Offers built-in management expertise in intuitive and powerful storage management software
Delivers continuous data security with full disk encryption and supports high-performing solid state drives (SSDs)
Offers Network Equipment Building System (NEBS) and European Telecommunication Standards Institute (ETSI) compliance and support for 48 V DC power supplies

IBM System Storage® DS3500 Express® combines best-of-breed development with leading 6 Gbps host interface and drive technology. With its simple, efficient and flexible approach to storage, the DS3500 Express is a cost-effective, fully integrated complement to IBM System x® servers, IBM BladeCenter® and IBM Power Systems™. By offering substantial improvements at a price that fits most budgets, the DS3500 Express delivers superior price/performance ratios, functionality, scalability and ease of use for the entry-level storage user.

The DS3500 Express offers:

Scalability to mid-range performance and features starting at entry-level prices
Efficiency to help reduce annual energy expenditures and environmental footprints
Simplicity that does not sacrifice control with the perfect combination of robustness and ease of use

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Cache 2 GB cache per controller with 4 GB upgrade (battery-backed)
Drive interfacee 2x 6Gb SAS 2 Port Daughter Card
Host interface Three options:
Eight 6 Gbps SAS ports
Eight 8 Gbps FC ports and four 6 Gbps SAS ports
Eight 1 Gbps iSCSI ports and four 6 Gbps SAS ports
Storage 12 bay (3.5′) Hot swap, Supports 6 Gbps SAS 3.5″
Drives:300 GB 15k rpm, 450 GB 15k rpm, 600 GB 15k rpm, 1 TB 7.2k rpm Nearline, 2 TB 7.2k rpm Nearline, 600 GB 15k rpm SED
RAID controller Raid ( 0, 1, 3, 5, 6, 10) Dual Active, hot-swappable controllers
Maximum drives supported Up to 96 drives—high performance SAS drives, nearline SAS drives, and SED SAS drives
EXP3512 (2U 12 3.5-in drives) and EXP3524 (2U 24 2.5-in drive) enclosures, which can be intermixed behind a DS3500 enclosure
power supplies Dual redundant, hot-swappable
Rack support 2U, 19-inch, industry-standard rack
Management software IBM System Storage DS® Storage Manager
SAN support Supported IBM FC switches and directors, and IP switches

 

Part number 1746A2S DS3512 Express Single Controller Storage System
1746A2D DS3512 Express Dual Controller Storage System
1746A4S DS3524 Express Single Controller Storage System
1746A4D DS3524 Express Dual Controller Storage System
1746T4D DS3524 Express DC Dual Controller Storage System
RAID controller Dual active, hot-swappable controllers
Cache 1 gigabyte (GB) cache per controller with 2 GB upgrade (battery-backed)
Host interface Four options:

  • Four or eight 6 Gbps SAS ports
  • Eight 8 Gbps Fibre Channel ports and four 6 Gbps SAS ports
  • Eight 1 Gbps iSCSI ports and four 6 Gbps SAS ports
  • Four 10 Gbps iSCSI ports and four 6 Gbps SAS ports
Drive interface Two 6 Gb SAS drive ports
Supported drives 6 Gbps SAS 3.5 in. drives:

  • 300 GB , 450 GB, 600 GB 15k rpm
  • 2 TB 7.2k, 3 TB 7.2k rpm nearline
  • 600 GB 15k rpm SED

6 Gbps SAS 2.5 in. drives:

  • 146 GB 15k rpm
  • 300 GB 15k rpm
  • 300 GB 10k rpm
  • 600 GB 10k rpm
  • 900 GB 10k rpm
  • 500 GB 7.2k rpm nearline
  • 300 GB 10k rpm SED
  • 1 TB 7.2k rpm

Solid-state SAS 2.5 in. drives*:

  • 200 GB and 400 GB SSD
RAID levels 0, 1, 3, 5, 6, 10
Storage partitions Support for up to 128 storage partitions (levels: 4 standard with upgrades to 8, 16, 32, 64 and 128)
Maximum drives supported
  • Up to 192 drives—high-performance SAS drives, nearline SAS drives, SSDs and SED SAS drives
  • EXP3512 (2U 12 3.5-in drives) and EXP3524 (2U 24 2.5-in drive) enclosures, which can be intermixed behind a DS3500 Express enclosure
Fans and power supplies Dual redundant, hot-swappable
Rack support 2U, 19 in., industry-standard rack
Management software IBM System Storage DS Storage Manager
SAN support Supported IBM Fibre Channel switches and directors, and IP switches
Warranty Three-year parts and labor warranty, 9×5 next business day, upgradable to 24×7 with four-hour response
Physical characteristics
Dimensions DS3512: Height: 3.39 in./86.16 mm, Width: 18.99 in./482.47 mm, Depth: 21.72 in./551.60 mm
DS3524: Height: 3.47 in./88.07 mm, Width: 18.98 in./482.10 mm, Depth: 19.60 in./497.93 mm
Supported systems For a list of currently supported servers, operating systems, host bus adapters, clustering applications and SAN switches and directors, refer to the DS3500 Express Interoperability Matrix.
Model Model description Interface Model includes
1746-E2A/EXP3512
1746-E4A/EXP3524
Drive enclosure 6 Gb SAS External security manager-embedded
Relative humidity (no condensation) EXP3512/EXP3524 drive enclosure
Operating range 20% to 80%
Storage range 10% to 90%
Maximum dew point 79°F (26°C)
Maximum gradient 10% per hour
Altitude ranges
Operating 100 ft. (30.5 m) below sea level to 10,000 ft. (3048 m) above sea level
Storage 100 ft. (30.5 m) below sea level to 10,000 ft. (3048 m) above sea level
Transit 100 ft. (30.5 m) below sea level to 40,000 ft. (12,000 m) above sea level
The tabulated power and heat dissipation values are the maximum measured operating power.
Acoustic noise EXP3512/EXP3524 drive enclosure
Sound power 6.5 bel
Sound pressure 65 dBA
Power input EXP3512/EXP3524 drive enclosure
Nominal voltage range 90 V ac to 264 V ac
Frequency range 50 to 60 Hz
Maximum operating current 3.90 A at 115 V ac
2.06 A at 230 V ac

The DS3500 series combines next-generation controller technology with a 6 GB SAS interconnect to the disk drives and the latest high-performance host interface technologies, 6 Gb SAS, 10 Gb iSCSI, and 8 Gb Fibre Channel (FC).

The DS3500 is available in two models. The DS3512 Express Storage System holds up to twelve 3.5-inch SAS disk drives and the DS3524 Express Storage System holds up to twenty-four 2.5-inch (small form factor) SAS disk drives (Figure 1). EXP3512 is a 12-drive enclosure and EXP3524 is a 24-drive enclosure that can be attached to either of the storage subsystems.

Offering substantial improvements at a price that fits most budgets, the DS3500 delivers superior price-to-performance ratios, functionality, scalability and ease of use for the entry-level storage user.

Figure 1. DS3512 (top) and DS3524 (bottom) front view

Did you know?

The IBM DS3500 is ready for the move to 10 Gb iSCSI with the four ports that it has. It provides backwards compatibility with 1Gb iSCSI environments, protecting your current investment while transitioning to the network of the future. It also maintains simplicity by using a standard RJ45 connection without the need of additional SFPs.

DS3500 highlights

The DS3500 is available with single or dual controllers, with the option to further enhance the performance of your dual controller system with the Turbo Performance option. You choose the configuration to match your current performance requirements and budget, and IBM offers a way to protect your investment with an upgrade path to later add the options that you need. With its simple, efficient, and flexible approach to storage, the DS3500 is a cost-effective, fully integrated complement to IBM System x® servers, IBM BladeCenter®, and IBM Power Systems™.
The next-generation 6 Gbps SAS systems deliver midrange performance and scalability at entry-level prices.
It provides investment protection and cost-effective backup and recovery with remote mirror across Fibre Channel and compatibility with DS5000 and DS4000®.
Full disk encryption with local key management provides relentless data security.
Drive and expansion enclosure intermix cost-effectively to meet all application, rack, and energy-efficiency requirements.

DS3500 part numbers

Table 1 lists several DS3500 part numbers associated with the IBM System Storage DS3500 series models.

Table 1. DS3500 part numbers

Part number Description
1746-A2S IBM System Storage DS3512 Express Single Controller Storage System
1746-A2D IBM System Storage DS3512 Express Dual Controller Storage System
1746-A4S IBM System Storage DS3524 Express Single Controller Storage System
1746-A4D IBM System Storage DS3524 Express Dual Controller Storage System
1746-T4D IBM System Storage DS3524 Express DC Dual Controller Storage System
1746-A2E IBM System Storage EXP3512 Express Storage Expansion Unit
1746-A4E IBM System Storage EXP3524 Express Storage Expansion Unit

DS3500 product overview

The DS3500 is available in two models, and each model can have either one or two controllers:

The DS3512 Express Storage System holds up to twelve 3.5-inch SAS disk drives.
The DS3524 Express Storage System holds up to twenty-four 2.5-inch SAS disk drives.

The capacity of a DS3500 system can be increased to up to 192 disk drives with the attachment of EXP3500 expansion units. It is also available in two models:

The EXP3512 Express Expansion Unit holds up to twelve 3.5-inch SAS disk drives.
The EXP3524 Express Expansion Unit holds up to twenty-four 2.5-inch SAS disk drives.

All models support dual-port, high-performance, high-capacity nearline and self-encrypting drives. Near-line SAS and SED disk drives of the same form factor can be intermixed within the appropriate DS3500 or EXP3500 enclosure. You can even intermix EXP3512 and EXP3524 expansion units behind either a DS3512 or DS3524 storage system.

DS3500 specifications

Table 2 provides a brief overview of IBM System Storage DS3500 Express models.

Table 2. DS3500 specifications

Feature Description
RAID controller Dual active, hot-swappable controllers.
Cache 1 GB cache per controller with 2 GB upgrade.

  • Mirrored, battery-backed, destaged to flash
Host interface Four interface options (SAS, iSCSI/SAS, FC/SAS):

  • Four or eight 6 Gbps SAS ports
  • Eight 8 Gbps Fibre Channel ports and four 6 Gbps SAS ports
  • Eight 1 Gbps iSCSI ports and four 6 Gbps SAS ports
  • Four 10 Gbps iSCSI ports and four 6 Gbps SAS ports
Drive interface Two 6 Gb SAS drive expansion ports.
Expansion enclosures EXP3512 (2U 12 3.5-in drive) and EXP3524 (2U 24 2.5-in drives) enclosures.

  • Enclosures can be intermixed behind a controller.
Maximum drives supported Up to 192 drives: high performance SAS drives, nearline SAS drives, and SED SAS drives.

  • EXP3512 supports 12 3.5-in drives.
  • EXP3524 supports 24 2.5-in drives.

Both of the expansion enclosures can be intermixed behind a DS3500.

Supported systems
  • IBM AIX®
  • IBM Linux on POWER® (LoP)
  • Microsoft Windows Server 2003
  • Microsoft Windows Server 2008
  • Red Hat Enterprise Linux
  • SuSE Linux Enterprise Server
  • VMware ESX Server
  • HP-UX
  • Mac OS

For a complete list of currently supported servers, operating systems, host bus adapters, clustering applications, and SAN switches and directors, refer to System Storage Interoperation Center (SSIC).

RAID levels 0, 1, 3, 5, 6, 10.
Storage partitions Support for up to 128 storage partitions (levels: four standard with upgrades to 8, 16, 32, 64, 128).
Copy services
  • IBM FlashCopy® (256)
  • Volume Copy (255)
  • Remote Mirroring through Fibre Channel host ports (16)
Performance options Turbo and base performance options.
Fans and power supplies Dual redundant, hot-swappable Power and cooling module houses power supplies, redundant cooling fans.
Rack support 2U, 19-inch, industry-standard rack.
Management software IBM System Storage DS® Storage Manager.
SAN support Supported IBM FC switches and directors, and IP switches.
CRUs All primary components are hot-swappable CRUs and can be accessed easily and removed or replaced.
Warranty Three-year parts and labor warranty, 9×5 next business day.
Upgradeable to 24×7 with 4-hour response.
Other DC-powered models available in enclosures for twenty-four 2.5-inch drives of (DS3524 and EXP3524).

Figure 2 shows the rear view of the DS3500 with Native SAS host ports only.

Figure 2. DS3500 rear view

Table 3 lists the physical characteristics of the IBM System Storage DS3500 models.

Table 3. DS3500 physical characteristics

Feature Description
Dimensions
  • DS3512 and EXP3512: height: 3.39 in./86.16 mm, width: 18.99 in./482.47 mm, depth: 21.72 in./551.60 mm
  • DS3524 and EXP3524: height: 3.47 in./88.07 mm, width: 18.98 in./482.10 mm, depth: 19.60 in./497.93 mm
Weight
  • DS3512 Single controller: 17.2 kg (38.0 lb)
  • DS3512 Dual controller: 18.5 kg (40.7 lb)
  • DS3524 Single controller: 20.2 kg (44.5 lb)
  • DS3542 Dual controller: 21.4 kg (47.2 lb)
  • EXP3512: weight: 16.9 kg (37.3lb)
  • EXP3524: weight: 19.9 kg (43.8lb)
Drive enclosure models
  • 1746-E2A – EXP3512
  • 1746-E4A – EXP3524

Drive interface – 6 Gb SAS.

Temperature
  • Operating: 0 to 35 °C (32 to 95 °F) at 30.5 to 3,000 m (100 to 9,840 ft)
  • Non-operating: -10 to 50 °C (-14 to 120 °F)
Heat dissipation (BTU per hour)
  • DS3512 – 1,307
  • DS3524 – 1,127
Relative Humidity (no condensation)
  • Operating range: 20 to 80%
  • Storage range: 10 to 90%
  • Maximum dew point: 79 °F (26 °C)
  • Maximum gradient: 10% per hour

Applies to EXP3512/EXP3524 Drive Enclosure also.

Altitude ranges
  • Operating: 100 ft (30.5 m) below sea level to 10,000 ft (3048 m) above sea level
  • Storage: 100 ft (30.5 m) below sea level to 10,000 ft (3048 m) above sea level
  • Transit: 100 ft (30.5 m) below sea level to 40,000 ft (12,000 m) above sea level
Acoustical noise emissions DS3512 and EXP3512 fully populated with 12 drives:

  • Sound power (idling): 6.2 bels
  • Sound power (operating): 6.2 bels
  • Sound pressure (idling): 62 dBA
  • Sound pressure (operating): 62 dBA

DS3524 and EXP3524 fully populated with 24 drives:

  • Sound power (idling): 6.4 bels
  • Sound power (operating): 6.4 bels
  • Sound pressure (idling): 64 dBA
  • Sound pressure (operating): 64 dBA
Electrical input (ac models)
  • Sine-wave input required: 50 – 60 Hz
  • Input voltage low range: 90 – 140 V ac
  • Input voltage high range: 200 – 264 V ac
  • Approximate input kilovolt-amperes(kVA): 0.06 – 0.38 kVA
Electrical input (dc models) Input voltage range:

  • Minimum: -42 V dc
  • Nominal: -48 V dc
  • Maximum: -60 V dc

Operating current: 15.3 A to 21.7 A.

EXP3512 and EXP3524 enclosures

Table 4 provides an overview of the IBM System Storage EXP3512 and System Storage EXP3524 Expansion Enclosures shown in Figure 3.

Figure 3. EXP3512 and EXP3524 enclosures

Table 4. Storage expansions

Feature Description
Drive interface 6 Gbps SAS.
Supported drives
  • 6 Gbps SAS 3.5″ drives – EXP3512.
  • 6 Gbps SAS 2.5″ drives – EXP3524.
Maximum drives supported
  • EXP3512: twelve 3.5-inch drives.
  • EXP3524: twenty-four 2.5-inch drives.

Scalability up to 192 drives (optional mix of expansion enclosures).

Fans and power supplies Dual.
Rack support Yes, standard.
Warranty 3-year limited warranty , CRU and on-site service, next business day 9×5, service upgrades available.
Size 2U rack-optimized.
Environment
  • Relative humidity: operating range 20 – 80%.
  • Operating altitude: 100 ft (30.5 m) below sea level to 9,840 ft (3000 m) above sea level.
Heat output
  • EXP3512: 945 BTUs/hr.
  • EXP3524: 821 BTUs/hr.
Energy consumption efficiency 80 PLUS efficiency standard.
Next-generation SAS expansion enclosures
  • Affordable entry point with midrange performance and reliability.
  • 6 Gbps x4 wide SAS ports support high bandwidth and random I/O applications.
Scalable up to 192 drives with a mix of EXP3512 and EXP3524 enclosures
  • Start small and grow your configuration as storage demands change.
  • A choice of EXP3512 and EXP3524 allow for flexibility to choose the optimal enclosure based on organizational requirements.
    • EXP3512 can offer the highest flexibility with support for a full range of requirements: high capacity and low cost to high-performance critical applications.
    • EXP3524 is ideal for IOPs-intensive applications and energy efficiency requirements with the highest IOPs/watt and 134% improvement in IOPs/U (compared to EXP3000 expansion unit).
Supports high-performance SAS, capacity-optimized SAS drives, and SEDs
  • Multiple drive support can increase efficiencies, which provides large consolidation and virtualization projects while keeping costs low.
  • Support of self-encrypting drives enables relentless data protection.
Redundant and hot-swappable ESMs, power supplies, and drives
  • Key component of a highly available and reliable storage configuration.
  • Support constant access to data 24×7.
Power supplies designed to meet multiple power efficiency standards Power efficiencies meet green initiatives and reduce overall energy expenditures.

Options and feature codes

Table 5 lists the option numbers and the feature codes of the various cables that can be ordered with the DS3500.

Table 5. Cables

Option number Feature code Description
39R6529 3708 1 m SAS Cable
39R6531 3707 3 m SAS Cable
39M5696 5601 1 m Fiber Cable (LC-LC)
39M5697 5605 5 m Fiber Cable (LC-LC)
39M5698 5625 25 m Fiber Cable (LC-LC)

Table 6 lists option numbers and the feature codes of the various upgrade options that can be ordered with the DS3500.

Table 6. Features and upgrades

Option number Feature code Description
68Y8436 4300 4 to 8 Partition Upgrade
68Y8437 4301 4 to 16 Partition Upgrade
68Y8438 4302 4 to 32 Partition Upgrade
68Y8439 4304 4 to 64 Partition Upgrade
68Y8440 4305 4 to 128 Partition Upgrade
68Y8441 4310 8 to 16 Partition Upgrade
68Y8442 4311 8 to 32 Partition Upgrade
68Y8443 4312 8 to 64 Partition Upgrade
68Y8444 4313 8 to 128 Partition Upgrade
68Y8445 4320 16 to 32 Partition Upgrade
68Y8446 4321 16 to 64 Partition Upgrade
68Y8447 4322 16 to 128 Partition Upgrade
68Y8448 4330 32 to 64 Partition Upgrade
68Y8449 4331 32 to 128 Partition Upgrade
68Y8450 4340 64 to 128 Partition Upgrade
81Y9620 4390 96 to 192 Drive Expansion
69Y2871 4400 Turbo Performance
68Y8490 4410 Full Disk Encryption (FDE)
68Y8451 4420 FlashCopy: Base
68Y8452 4421 FlashCopy: Upgrade to 8 per volume/64 per system
68Y8453 4430 Volume Copy: Base
68Y8454 4440 FlashCopy Base/Volume Copy Base
68Y8455 4450 Remote Mirroring: Base
81Y9622 4451 Remote Mirroring: Upgrade
68Y8458 4700 AIX/VIOS Host Kit
68Y8459 4710 Linux on Power Host Kit
68Y8461 4720 HP-UX Host Kit
94Y8434 4730 Mac OS Host Kit
69Y2909 6313 United States 10A line C13 to NEMA 5-15P (2.8M)
68Y8479 3600 Second Controller
68Y8431 3610 6 Gb SAS 2 Port Daughter Card
68Y8432 3611 8 Gb FC 4 Port Daughter Card
68Y8433 3612 1 Gb iSCSI 4 Port Daughter Card
81Y9613 3613 10 Gb iSCSI 2 Port Card
69Y2876 3620 8 Gb FC SW SFP Transceivers (Pair)
68Y8434 3630 2 GB Cache Upgrade

Table 7 lists option numbers and the feature codes of the various disk drives that can be ordered with the DS3500. The same part numbers also apply to the EXP3500 Expansion units.

Table 7. Disk drives

Option number Feature code Description
2.5-inch disk drives
49Y1841 5205 146 GB 15 k rpm 6 Gb SAS
49Y1836 5210 300 GB 10 k rpm 6 Gb SAS
49Y1952 5250 300 GB 10 k rpm 6 Gb SAS SED
49Y1851 5265 500 GB 7.2 k rpm 6 Gb NL SAS
49Y2048 5220 600 GB 10 k rpm 6 Gb SAS
81Y9915 5225 900 GB 10 k rpm 6 Gb NL SAS
81Y9872 5270 1 TB 7.2 k rpm 6 Gb NL SAS
81Y9903 5500 200 GB SAS SSD
81Y9907 5505 400 GB SAS SSD
3.5-inch disk drives
49Y1856 5100 300 GB 15 k rpm SAS
49Y1861 5105 450 GB 15 k rpm SAS
49Y1866 5110 600 GB 15 k rpm SAS
49Y1947 5150 600 GB 15 k rpm SAS SED
49Y1876 5165 1 TB 7.2 k rpm NL SAS
49Y1871 5175 2 TB 7.2 k rpm NL SAS
81Y9886 5185 3 TB 7.2 k rpm 6 Gb NL SAS

Ports and host connections

The DS3500 controller has several connection ports for different purposes (Figure 6). It supports three different host interface cards (HIC), also known as daughter cards, for host connections:
FC
iSCSI
SAS

Each of these is shown in the following figures.

Note: Only one type of optional interface can be added to any one DS3500 storage server. Mixing host interface cards between controllers in the same DS3500 is not supported.

Figure 4 shows the connections of a controller without a HIC installed.

Figure 4. DS3500 controller rear view

Figure 5 shows a rear view of the DS3500 with a SAS daughter card installed. Adding the SAS host interface card simply adds two more SAS 2.0 6 Gbps host ports.

Figure 5. DS3500 controller rear view with SAS daughter card

Figure 6 shows a rear view of the DS3500 with a iSCSI daughter card installed. It is essentially just the base controller with four additional RJ-45 Ethernet ports, all usable for iSCSI traffic.

Figure 6. DS3500 controller rear view with iSCSI daughter card

Figure 7 shows a rear view of the DS3500 with a FC HIC installed, which adds four FC 8 Gbps connections, which can also negotiate at 4 Gbps or 2 Gbps.

Figure 7. DS3500 controller rear view with FC daughter card

Power supplies

Each DS3500 and EXP3500 enclosure comes with two high-efficiency, removable, 585-watt power supplies (Figure 8) as standard. Each power supply has two internal fans for cooling the enclosure. The four fans pull air through the drives from front to back across the drives. The DS3500 meets the Network Equipment Building System (NEBS) and European Telecommunications Standards Institute (ETSI) Telco specification requiring very robust abilities and support for 48 V DC power supplies.

Figure 8. DS3500 power supplies/LED indicators

Fiber Channel cables and connectors

In this section, we discuss essential characteristics of fiber cables and connectors. This information can help you understand the options that you have for connecting and cabling the DS3500 Storage System.

Fiber cables are basically available in multi-mode fiber (MMF) or single-mode fiber (SMF). MMF allows light to disperse in the fiber so that it takes many paths, bouncing off the edge of the fiber repeatedly to finally get to the other end (multi-mode means multiple paths for the light). The light taking these various paths gets to the other end of the cable at slightly separate times (separate paths, separate distances, and separate times). The receiver has to determine which in-coming signals go together.

SMF is so thin (9 microns) that the light can barely “squeeze” through and it tunnels through the center of the fiber using only one path (or mode). This behavior can be explained (although not simply) through the laws of optics and physics. The result is that because there is only one path that the light takes to the receiver, there is no “dispersion confusion” at the receiver. Table 8 lists the supported distances.

Table 8. Cable type overview

Fiber Type Speed Maximum distance
9 micron SMF (longwave) 1 Gbps 10 km
9 micron SMF (longwave) 2 Gbps 2 km
50 micron MMF (shortwave) 1 Gbps 500 m
50 micron MMF (shortwave) 2 Gbps 300 m
50 micron MMF (shortwave) 4 Gbps 150 m
50 micron MMF (shortwave) 8 Gbps 50 m
62.5 micron MMF (shortwave) 1 Gbps 300 m
62.5 micron MMF (shortwave) 2 Gbps 150 m
62.5 micron MMF (shortwave) 4 Gbps 70 m
62.5 micron MMF (shortwave) 8 Gbps 21 m

Other feature highlights

This section highlights important features of DS3500 System Storage.

Host connectivity

IBM System Storage DS3500 enables Multi-protocol providing concurrent iSCSI/SAS or FC/SAS host connectivity. Figure 9 shows the two available options.

Figure 9. iSCSi/SAS or FC/SAS host connectivity

IBM System Storage DS Storage Manager

The IBM Storage System DS3500 uses the same IBM DS Storage manager as the DS5000 product line and the legacy DS3000 models. Through this software, it is possible to perform administrative tasks such as creating arrays, logical drives, assigning logical drives to the host servers, setting up FlashCopy and Volume Copy, capturing logs for troubleshooting, and so on. Figure 10 shows the IBM System Storage DS Storage Manager Enterprise Management window.

Figure 10. Enterprise Management GUI

Turbo Key

The Turbo Key is an optional premium feature that, when enabled, boosts the performance of a storage system across both throughput and IOP workloads, allowing you to take full advantage of DS3500 performance capabilities with bandwidth-intensive applications. The DS3500 Turbo Key offers:
Scalability to midrange performance and features starting at entry-level prices
Efficiencies to help reduce annual energy expenditures and environmental footprint
Simplicity that does not sacrifice control with the perfect combination of robustness and ease of use

Figure 11 provides a comparison with and without the Turbo Key premium feature enabled.

Figure 11. Turbo Key

Storage partitions

Storage partitioning adds a high level of flexibility to the DS3500 Storage System. The DS3500 comes with four partitions by default, which can be expanded to a maximum of 128.
It enables you to connect multiple and heterogeneous host systems to the same storage server, in either stand-alone or clustered mode. The term storage partitioning is somewhat misleading because it actually represents a host or a group of hosts and the logical drives that they access. Without storage partitioning, the logical drives configured on a DS3500 Storage System can only be accessed by a single host system or by a single cluster, which can lead to inefficient use of storage server hardware unless the use of the DS3500 Storage System is dedicated to a single host (for example, SVC or v7000 attachment).

FlashCopy

FlashCopy creates a capacity-efficient, point-in-time copy of a physical volume for data protection uses, such as file restoration and backup. A FlashCopy volume is the logical equivalent of the physical volume, but is created more quickly than a physical copy and with minimal disruption to applications and production processes. Using copy-on-write technology, FlashCopy volumes preserve data in its original form even as data in the physical (source) volume is changed. FlashCopy volumes appear and function as standard storage volumes, and restoration of a FlashCopy volume is quick and easy.

FlashCopy Scheduler

With the new FlashCopy Scheduler, its now possible to schedule FlashCopy images via the user interface. This can be applied to new and existing snapshot volumes. Figure 12 and Figure 13 show the new menu item from the GUI interface.

Figure 12. Create Schedule option via GUI Interface

Figure 13. Simple and effective menu for scheduling a FlashCopy Image

Volume Copy

The Volume Copy premium feature creates a physical copy of a volume. Volume Copy is used with FlashCopy to create a physical copy of your data with minimal disruption to applications and production processes. Upon completion of the Volume Copy process, the new volume can be mapped to any host, and it functions as a standard volume. Volume Copy can also be used to redistribute data within the DS3500, moving volumes to a different disk drive technology or RAID level. Both FlashCopy and Volume Copy are performed by the DS3500 storage system, so no host server resources are used. A copy can be initiated while the source volume remains available for writes. Figure 14 shows Volume Copy in action.

Figure 14. Volume manager copying from logical drive RootBoot-Blade1 to RootBoot-Blade2

Graphical performance monitor

The graphical performance monitor provides information about storage I/O from multiple view points. This monitoring tool is very important for performance analysis of a managed storage subsystem. It allows administrator to make informed decisions about storage system adjustments, such as free space usage, locating stranded storage, and efficient provisioning. Figure 15 shows the graphical performance monitor feature in the GUI.

Figure 15. Graphical performance monitor

Full data encryption (FDE)

The SAS SED drives are required to enable disk security and can perform symmetric encryption and decryption of data at full disk speed with no impact on performance. The disk encryption hardware is used in conjunction with IBM Disk Encryption Storage Manager on the DS3500 storage subsystem. It uses asymmetric encryption to encrypt and decrypt the data key. IBM Disk Encryption Storage Manager will generate encryption and decryption keys that are used to lock each SAS SED drive.

Figure 16. DS3500 disk encryption manager using self-encrypting SAS SED drives

Remote mirroring

Remote mirroring provides storage-system-based data replication from one DS3500 system to another DS3500 system over Fibre Channel communications links. Remote Mirroring supports synchronous or asynchronous data transfers, enabling you to choose the replication method that best meets your protection, distance, or performance requirements:
Synchronous mirroring is designed to provide continuous mirroring between primary and remote volumes to help ensure absolute synchronization.
Asynchronous mirroring queues remote writes to reduce the latency, thus enabling long-distance replication while increasing local system performance. Asynchronous mirroring includes a write consistency option designed to ensure that writes to the remote system complete in the same order as the local system.

Remote mirroring also includes features such as dynamic mode switching, suspend and resume with delta resynchronization, read-only and FlashCopy/Volume Copy access to secondary volumes, and cross-mirroring.

IBM RSM for Storage

IBM Remote Support Manager for Storage (RSM for Storage) software is a no-charge software package that is installed on an IBM System x server running Novell SUSE Linux Enterprise Server 9, SUSE Linux Enterprise Server 10, Red Hat Enterprise Linux 4 Advanced Server, or Red Hat Enterprise Linux 5. It provides problem reporting and remote access for IBM Service for the IBM System Storage DS3000, DS4000, and DS5000 families.

The problem reporting utility provided by RSM for Storage automatically creates an entry in the IBM call management system for each subsystem that reports a problem. This is the equivalent of placing a voice call to IBM Service for a problem. Once in the system, problems are responded to with the priority specified by the maintenance agreement in place for the product.

Interoperability

Table 9 lists the latest operating systems supported by the IBM System Storage DS3500 with the corresponding multipath driver. We suggest checking the IBM System Storage Interoperation center (SSIC):

http://www-03.ibm.com/systems/support/storage/ssic/interoperability.wss

Table 9. Latest supported operating systems

Operating systems Multipath driver
IBM AIX 7.1 IBM MPIO
Novell SUSE Linux Enterprise Server 11 SP1 LSI RDAC
Red Hat Enterprise Linux 6 Linux Device Mapper Multipath LSI RDAC
VMware vSphere/ESX 4.1 U1 Vmware Native Multipathing Plugin (NMP)
Microsoft Windows Server 2008 SP2 Microsoft MPIO (with LSI Device Specific module DSM)
HP HP-UX 11iv3 (11.31) HP TPGS
IBM VIOS 2.2 with client AIX 7.1 or later IBM MPIO
IBM VIOS 2.2 with client IBM i 7.1 or later IBM MPIO
IBM VIOS 2.2 with client Red Hat 6 or later IBM MPIO
IBM VIOS 2.2 with client SLES 11 or later IBM MPIO

Host bus adapters

Refer to the IBM System Storage Interoperation Center (SSIC) for compatible HBAs:

http://www-03.ibm.com/systems/support/storage/ssic/interoperability.wss

Drivers and firmware downloads

Fix Central provides fixes and updates for your system’s software, hardware, and operating system. To download fixes, drivers, and firmware for the IBM System Storage DS3500, select the corresponding fields on the following IBM website:

http://www-933.ibm.com/support/fixcentral/

Figure 17. IBM Support: Fix Central

Disk attachment

This section describes the requirements and best practice guidelines for connecting EXP3500 enclosures to a DS3500 storage subsystem.

Figure 18 shows the SAS connections between a single controller DS3500 subsystem and three EXP3500 enclosures, with a single ESM installed in each EXP3500. This configuration is a fully functional configuration, but there is no redundancy on the drive-side connections.

Figure 18. Single controller attachment

Figure 19 shows how to correctly cable a dual controller DS3500 to a single EXP3500 enclosure with two ESMs installed. This configuration provides redundancy on the drive-side connections.

Figure 19. Dual controller attachment

Figure 20 shows the SAS cable connections when using the top-down/bottom-up cabling layout with the DS3500 storage subsystem at the top. This is the preferred SAS expansion cabling for when you are connecting two or more EXP3500 enclosures, up to the supported maximum of eight EXP3500 enclosures.

Figure 20. Top-down/bottom-up SAS drive-side connections

Host attachment

This section outlines the supported topologies for a DS3500 considering FC, iSCSI, and SAS connections. There are examples for both single and dual controller DS3500 storage subsystems.

General rule: Although some of the examples shown next are valid supported configurations, there are some with no redundancy of host-side connections. Always use redundant host-side connections instead.
FC direct attachment: The DS3500 storage subsystem supports both direct attached and SAN fabric attached hosts. You can attach up to four direct-connected hosts or up to 64 host servers in a switched fabric SAN infrastructure. This section describes sample configurations of direct-attached Fibre Channel host servers.
SAS connections: Host server SAS HBAs are used to connect to the DS3500 SAS ports. Each DS3500 controller can have up to four SAS host ports when you install the optional SAS host interface adapter. When the optional SAS host interface adapter is installed, the DS3500 can support up to 28 Blade Center hosts when attached to the SAS Connectivity Module for IBM Blade Center and up to four hosts in a direct attached host environment.
Topologies

The DS3500 supports multiple-host, multiple-port, and multiple-fabric (Fibre Channel or iSCSI, and SAS) configurations. That is, the DS3500 storage subsystem supports simultaneous SAS and either iSCSI or Fibre Channel host connections with the optional iSCSI or Fibre Channel host adapter installed, up to a maximum of 64 hosts. Figure 21 shows an example of this type of configuration with one SAS attachment and one iSCSI or FC host.

Figure 21. Host connections

Warranty period and warranty service

Every DS3500 is covered by the below warranty:
System (including the cache backup battery module): three years
Optional features: three years, unless specified otherwise

Optional IBM features initially installed in an IBM system carry the same warranty

Optional IBM features initially installed in an IBM system carry the same warranty and warranty service support category as the system. If installed after the initial system installation, they carry the balance of the system warranty or the optional feature warranty, whichever is greater.

Customer replaceable unit (CRU) service

IBM provides replacement CRUs to you for you to install. CRU information and replacement instructions are shipped with your machine and are available from IBM upon your request.

Table 10 lists the various warranty options for different models of the DS3500 System Storage.

Table 10. Warranties

ServicePac® DS3512*
EXP3512 DS3524*
EXP3524 DS3524
DC Power**
EXP3524
DC Power
Part number 1746A2S
1746A2D
1746A2E 1746A4S
1746A4D
1746A4E 1746T4D 1746T4E
Warranty and maintenance option
3-year onsite repair 24×7 2-hour response 88Y8187 88Y8213 88Y8200 88Y8226 N/A N/A
3-year onsite repair 24×7 4-hour response 88Y8186 88Y8212 88Y8199 88Y8225 N/A N/A
3-year onsite repair 9×5 4-hour response 88Y8185 88Y8211 88Y8198 88Y8224 N/A N/A
5-year onsite repair 24×7 2-hour response 88Y8189 88Y8215 88Y8202 88Y8228 N/A N/A
5-year onsite repair 24×7 4-hour response 88Y8188 88Y8214 88Y8201 88Y8227 N/A N/A
Maintenance agreement
1-year onsite repair 24×7 2-hour response 88Y8193 88Y8219 88Y8206 88Y8232 N/A N/A
1-year onsite repair 24×7 4-hour response 88Y8192 88Y8218 88Y8205 88Y8231 N/A N/A
1-year onsite repair 9×5 4-hour response 88Y8191 88Y8217 88Y8204 88Y8230 N/A N/A
1-year onsite repair 9×5 next business day 88Y8190 88Y8216 88Y8203 88Y8229 N/A N/A
2-year onsite repair 24×7 2-hour response 88Y8197 88Y8223 88Y8210 88Y8236 N/A N/A
2-year onsite repair 24×7 4-hour response 88Y8196 88Y8222 88Y8209 88Y8235 N/A N/A
2-year onsite repair 9×5 4-hour response 88Y8195 88Y8221 88Y8208 88Y8234 N/A N/A
2-year onsite repair 9×5 next business day 88Y8194 88Y8220 88Y8207 88Y8233 N/A N/A
Remote technical support
RTS for Storage Devices – Base – 1yr 29R5810 29R5810 29R5810 29R5810 29R5810 29R5810
RTS for Storage Devices – Base – 3yr 41W9377 41W9377 41W9377 41W9377 41W9377 41W9377

* for both single and dual controller
**for dual controller

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