Ds4800 Storage Subsystem Drive Cabling Topologies; Different Ways To Connect Four Storage Expansion Enclosures To The Ds4800 - IBM DS4800 User, Installation And Maintenance Manual

5. Set unique enclosure IDs for all storage expansion enclosures that are cabled to
The DS4800 Storage Subsystem locates the drives in the storage expansion
enclosures after you power on the configuration. Always connect power to the
storage expansion enclosures first and then connect power to the DS4800. After
you have powered on the configuration, use the DS4000 Storage Manager client to
check the status of the new drives, correct any errors found, and configure the new
drives.

DS4800 Storage Subsystem drive cabling topologies

The following sections provide preferred cabling topologies for cabling storage
expansion enclosures to the DS4800 Storage Subsystem. Each example provides
redundant paths to the drives. If one of these examples is suitable for your
hardware and application, complete the cabling connections as described in the
tables. If you have hardware to include in your topology other than what is shown in
these examples, use the examples as a starting point for creating your specific
topology.
Attention:
expansion enclosures per redundant drive channel pair. The DS4800 supports two
redundant drive channel pairs.
If you are using fiber-optic cables, install SFP modules into the ports that will
receive the cables before installing the cables.
Figure 47 on page 70 shows the locations of controllers A and B, and the
single-ported host channels, Ethernet ports, and dual-ported drive channels at the
back of the DS4800 Storage Subsystem.
Table 14. Different ways to connect four storage expansion enclosures to the DS4800
Drive Channel 1
port 4
Case 1 4
Case 2 3
Case 3 0
Case 4 2
Case 5 0
Case 6 1
Case 7 1
the DS4800 for the EXP710 and EXP100 only. See "DS4000 storage expansion
enclosure ID settings" on page 78, and refer to your storage expansion
enclosure installation manual for details on setting the enclosure ID.
The DS4800 supports the connection of a maximum of 8 storage
Drive Channel 1 Drive Channel 2
port 3 port 2
0 0
1 0
3 1
2 0
2 2
3 0
1 1
Chapter 3. Cabling the storage subsystem
Drive Channel 2
port 1
0
0
0
0
0
0
1
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