Specifications
v All host systems connected to the same ESS must have the same type of SCSI
adapter or a compatible SCSI adapter. For details on adapters, see the following
Web site:
www.storage.ibm.com/hardsoft/products/ess/supserver.htm
Attachment procedures
Perform the following steps to attach multiple host systems to the ESS:
1. Is the ESS currently installed on a host system?
Yes No
↓ Go to step 3.
2. Is any data stored on the ESS that you want to preserve?
No Yes
↓ Go to “Saving data on the ESS” on page 66.
3. If you have not previously installed SCSI interface cards in the associated host
systems, do so now by using the instructions for your host system.
4. Assign a unique SCSI ID to each of the SCSI interface cards that you install in
your host system.
5. Turn off the host systems that you are connecting. This allows the SCSI ID to
take effect when you turn on the host.
Note: Do not connect the host systems to the ESS at this time.
6. Install the SCSI signal cables.
7. Turn on one host system at a time. Allow each system unit to complete its
start-up procedure before you turn on the next host system connected to the
ESS.
8. After all the host systems have completely started up, if the power to the ESS
is off, turn it on.
9. On each of the host systems, use the mkdir /usr/opt/your_files command to
create a new directory. This step is unnecessary if the directory already exists.
10. On each of the host systems, use the cd /usr/opt/your_files command to
change the active directory.
11. On each of the host systems, use the tar command to read the CD files into
the /usr/lpp/2105 directory. This step is unnecessary if the directory and files
already exist. Use the tar xvf flags for proper extraction. For example, to read
the files from the fd0 directory, type: tar -xvf /dev/fd0.
12. On each of the host systems, use the /usr/opt/your_files command to run the
ESS installation program on each host system that is connected to the ESS.
Wait for the program to complete on one system before you run it on the next.
13. On each host system, use the lsdev -Cc disk command to verify that each
associated system unit has the hdisk descriptions defined for all initialized
LUNs.
14. Determine which hdisks are accessed.
15. Do you have any data currently on the ESS that you want preserved from a
previous installation on the host system?
No Yes
↓ Go to “Restoring data on the ESS” on page 66.
16. Type smit mkvg to create a volume group on the selected hdisk.
17. Click No for the Activate Volume Group Automatically.
Chapter 6. Attaching to an IBM RS/6000 or IBM eServer pSeries host 65