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IBM Disk System V3700 LFF

Product ID: 2072L2C
2072L2C Lager form-factor (SFF) dual-control enclosure; Host interface: 1 Gbps iSCSI and 6 Gbps SAS (optional 8 Gbps Fibre Channel, 1 Gbps iSCSI, 6 Gbps SAS or 10 Gbps iSCSI/Fibre Channel over Ethernet); Storwize V3700 graphical user interface; Cache per controller: 4 GB upgradable to 8 GB; Drive type: Dual-port, hot-swappable 6 Gb SAS disk drives; Supported drives LFF 3.5-inch disk drives: 2 TB, 3 TB and 4 TB at 7.2k rpm; 900 GB and 1.2 TB at 10k rpm; 300 GB at 15k rpm- Maximum drives supported LFF enclosure: 12 x 3.5-inch drives; RAID levels RAID 0, 1, 5, 6 and 10.

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IBM Storwize V3700 models

The IBM Storwize V3700 platform consists of several different models.

The IBM Storwize V3700 models are described in Table 1-2. All models have two node canisters. C models are control enclosures and E models are expansion enclosures.

Table 1-2

 

Model

Total System Cache

Drive slots

2072-12C (with two node canister)

8 GB upgradeable to 16 GB

12 x 3.5-inch per enclosure

2072-24C (with two node canister)

8 GB upgradeable to 16 GB

24 x 2.5-inch per enclosure

2072-12E (one expansion enclosure)

N/A

12 x 3.5-inch

2072-24E (one expansion enclosure)

N/A

24 x 2.5-inch

IBM Storwize V3700 models

Figure 1-1 shows the front view of the 2072-12C and 12E enclosures.

Figure 1-1 IBM Storwize V3700 front view for 2072-12C and 12E enclosures

The drives are positioned in four columns of three horizontal-mounted drive assemblies. The drive slots are numbered 1 – 12, starting at upper left and going left to right, top to bottom.

Figure 1-2 shows the front view of the 2072-24C and 24E enclosures.

Figure 1-2 IBM Storwize V3700 front view for 2072-24C and 24E enclosure

The drives are positioned in one row of 24 vertically mounted drive assemblies. The drive slots are numbered 1 – 24, starting from the left. There is a vertical center drive bay molding between slots 12 and 13.

Figure 1-4 shows the controller rear view of IBM Storwize V3700 models 12C and 24C.

Figure 1-4 IBM Storwize V3700 controller rear view – models 12C and 24C

In Figure 1-4, you can see that there are two power supply slots at the bottom of the enclosure. The Power Supply units are identical and exchangeable. There are two canister slots at the top of the chassis.

In Figure 1-5, you can see the rear view of an IBM Storwize V3700 expansion enclosure.

Figure 1-5 IBM Storwize V3700 expansion enclosure rear view – models 12E and 24E

You can see that the only difference between the control enclosure and the expansion enclosure are the canisters. The canisters of the expansion have only the two SAS ports

Control enclosure

Each IBM Storwize V3700 system has one control enclosure that contains two node canisters, disk drives, and two power supplies.

Figure 1-6 shows a single node canister.

Figure 1-6 IBM Storwize V3700 node canister

Each node canister contains the following hardware:

Battery

Memory: 4 GB memory (upgradeable to 8 GB)

Host Interface Card slot (different options are possible)

Four 6 Gbps SAS ports

Two 10/100/1000 Mbps Ethernet ports

Two USB 2.0 ports (one port is used during installation)

System flash

The battery is used in case of power loss. The IBM Storwize V3700 system uses this battery to power the canister while the cache data is written to the internal system flash. This memory dump is called a fire hose memory dump. After the system is up again, this data is loaded back to the cache for destage to the disks.
Figure 1-6 also shows the following ports, which are provided by the IBM Storwize V3700 node canister:
Two 10/100/1000 Mbps Ethernet ports

Port 1 (left port) must be configured. The second port is optional and is used for management. Both ports can be used for iSCSI traffic. For more information, see Chapter 4, Host configuration.
Two USB ports.

One port is used during the initial configuration or when there is a problem. They are numbered 1 on the left and 2 on the right. For more information about usage, see Chapter 2, Initial configuration.
Four serial attached SCSI (SAS) ports.

These ports are numbered 1 on the left to 4 on the right. The IBM Storwize V3700 uses ports 1, 2 and 3 for host connectivity and port 4 to connect to the optional expansion enclosures. The IBM Storwize V3700 incorporates one SAS chains and four expansion enclosures can be connected to each chain.

 

 

Service port: Do not use the port that is marked with a wrench. This port is a service port only.

 

The two nodes act as a single processing unit and form an I/O Group that is attached to the SAN fabric, an iSCSI infrastructure or directly attached to hosts via FC or SAS. The pair of node is responsible for serving I/O to a volume. The two nodes provide a highly available fault-tolerant controller so that if one node fails, the surviving node automatically takes over. Nodes are deployed in a pair that is called an I/O Group.

One node is designated as the configuration node, but each node in the control enclosures holds a copy of the control enclosure state information.

The IBM Storwize V3700 only supports one I/O group in a clustered system.

Expansion enclosure

The optional IBM Storwize V3700 expansion enclosure contains two expansion canisters, disk drives, and two power supplies.

Figure 1-7 shows an overview of the expansion enclosure.

Figure 1-7 Expansion enclosure of the IBM Storwize V3700

The expansion enclosure power supplies are the same as the control enclosure. There is a single power lead connector on each power supply unit.

Figure 1-8 shows the expansion canister ports.

Figure 1-8 Expansion canister ports

Each expansion canister that is shown in Figure 1-8 provides two SAS interfaces that are used to connect to the control enclosure and any optional expansion enclosures. The ports are numbered 1 on the left and 2 on the right. SAS port 1 is the IN port and SAS port 2 is the OUT port.

The use of the SAS connector 1 is mandatory because the expansion enclosure must be attached to a control enclosure or another expansion enclosure. SAS connector 2 is optional because it is used to attach to more expansion enclosures.

Each port includes two LEDs to show the status. The first LED indicates the link status and the second LED indicates the fault status.

Host interface cards

In addition to 1Gb iSCSI, 6Gb SAS, there are options to purchase host interface cards for your control enclosure. Table 1-3 lists the IBM Storwize V3700 configurations available.

Table 1-3

 

Standard

Optional

1Gb iSCSI

6Gb SAS

1Gb iSCSI

6Gb SAS

8Gb FC

10Gb iSCSI/FCoE

4 ports

6 ports

4 ports

6 ports

8 ports

4 ports

6 ports

8 ports

4 ports

6 ports

8 ports

4 ports

6 ports

4 ports

IBM Storwize V3700 configurations available.

Disk drive types

IBM Storwize V3700 enclosures support SSD, SAS, and Nearline SAS drive types. Each drive has two ports (two PHYs) and I/O can be issued down both paths simultaneously.

Table 1-4 shows the IBM Storwize V3700 Disk Drive types that are available at the time of writing.

Table 1-4

 

Drive type

Speed

Size

2.5-inch form factor

Solid-state disk

N/A

200 and 400 GB

2.5-inch form factor

SAS

10,000 rpm

600 GB, 900 GB and 1.2 TB

2.5-inch form factor

SAS

15,000 rpm

146 and 300 GB

2.5-inch form factor

Nearline SAS

7,200 rpm

500 GB and 1 TB

3.5-inch form factor

SAS

10,000 rpm

900 GB and 1.2 TB (1)

3.5-inch form factor

SAS

15,000 rpm

300 GB(1)

3.5-inch form factor

Nearline SAS

7,200 rpm

2, 3 and 4TB

IBM Storwize V3700 Disk Drive types

(1) 2.5″ drive in a 3.5″ drive carrier.

 

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