IBM Partner Pavilion manual Cabling the DS4100 to a redundant loop

Drive loop A	Drive loop B
Fibre Channel	Fibre Channel
interface cables	interface cables

Input Output Input Output

2

Drive enclosures

group 1

Drive loop B

New DS4000 EXP100

3 1 Drive loop A

Second DS4000 EXP100

First DS4000 EXP100

Drive loop C

Storage server

Drive Expansion	Drive Expansion
Port A	Port B

f10ug047

Figure 78. Cabling the DS4100 to a redundant loop

In Figure 78, the existing DS4100 configuration already includes two DS4000 EXP100s. The dashed lines show you how to add a third DS4000 EXP100 to the configuration. To add the new DS4000 EXP100 shown in Figure 78, you would perform the following steps:

1.Verify that the existing configuration is powered on and is in optimal state. Use the DS4000 Storage Manager client to correct any problems before proceeding.

2.Unpack the new DS4000 EXP100 and mount it in the proper position on the rack cabinet.

3.Make the fibre-channel connection marked 1 in Figure 78 (drive loop B). Then power on the new DS4000 EXP100 and verify that it is recognized by the DS4000 Storage Manager software GUI.

4.Make the fibre-channel connection marked 2 in Figure 78.

5.Make the fibre-channel connection marked 3 in Figure 78 (drive loop A).

6.Use the DS4000 Storage Manager client to verify the ESM firmware version of the new EXP100.

v If the ESM firmware version of the new DS4000 EXP100 is version 953x or lower, disconnect the new DS4000 EXP100 and contact IBM support, your IBM reseller, or your IBM representative for assistance.

vIf the ESM firmware version of the new EXP100 is version 9554 or higher, but does not match exactly the ESM firmware version of the DS4000 EXP100s that were already installed in the DS4100 configuration, then refer to the procedures for resolving ESM firmware mismatches in the IBM TotalStorage DS4000 EXP100 Expansion Unit Installation, User’s, and Maintenance Guide.

110IBM TotalStorage DS4100 Storage Server: Installation, User’s, and Maintenance Guide