Connecting An Ibm Exp400 Expansion Unit To A Ds400 Storage Subsystem - IBM TotalStorage DS300 Hardware Installation And User's Manual

Connecting an IBM EXP400 expansion unit to a DS400 storage
subsystem
After you install the storage subsystem, you can connect up to two IBM EXP400
expansion units to a DS400 storage subsystem. You can do this at any time after
you install the storage subsystem, even while it is turned on and processing data.
When two EXP400 expansion units are connected to the DS400 storage
subsystem, the storage subsystem controls up to 40 hard disk drives.
Notes:
1. Before you can connect an EXP400 to a DS400 storage subsystem, you must
2. For dual controller models only: Make sure that two SCSI Bus Expander and
3. The hard disk drive at SCSI ID=6 is disabled for both single and dual controller
To connect an EXP400 expansion unit to a DS400 storage subsystem, complete the
following steps:
1. Follow the instructions in the documentation that comes with the expansion unit
2. Use the IBM 2M SCSI cable that comes with the expansion unit or use a 4.2M
purchase an IBM EXP400 Attach License for DS400. For more information,
contact your IBM marketing representative or authorized reseller.
Enclosure Services Modules (ESMs) are installed in the EXP400 expansion unit.
configurations.
to set up and mount the new expansion unit in a rack.
LVD SCSI cable to connect the EXP400 to the DS400 (see Figure 38 on page
44.) You can connect one or two expansion units.
Important: For dual controller DS400 models only: Make sure that you
connect an EXP400 to both Channel 3 connectors or both Channel 4
connectors on the DS400 storage subsystem. You cannot connect an EXP400
to Channel 3 and Channel 4 on the same DS400 storage subsystem.
Chapter 7. Cabling the DS400 storage subsystem
43