User`s guide

Chapter 1. Implementing Fibre Channel host adapter cards 13
4. Either you or an IBM SSR checks the LUN limitations for the RS/6000 and
pSeries. See Table 2.
1.4.2 Installing the 2105 host attachment package
This section provides the instructions to install the host attachment package for
the ESS on your host system. IBM recommends that you run the host attachment
package on each host system attached to the ESS for which an installation script
is provided.
Before installing the 2105 host attachment package
Perform the following steps before you install the host attachment package:
1. Attach the ESS to your host system. See Attaching an ESS to an
open-systems host with SCSI adapters.
2. Turn on the host system and all attachments.
3. Ensure that you have root access.
4. Ensure that you have administrator knowledge.
5. Ensure that you have knowledge of the System Management Interface Tool
(SMIT).
1.4.3 Replacing an older version of the 2105 installation package
If you want to replace an older version of the host attachment package (tar
version) and have data that exists on all configured 2105 disks, the code prompts
you to remove all ESS product-related hdisk devices. Perform the following steps
to remove the devices:
1. Run the umount command on the file system.
For example, type umount -t x, where x is the file system name.
2. Run the varyoffvg 2105 command for the volume group.
For example, type varyoffvg -s VGname
3. Type rmdev -dl on the command line to unconfigure the 2105 devices.
Note: The IBM Subsystem Device Driver supports RS/6000 and pSeries host
systems in a clustering environment. To have failover protection on an open
system, the IBM Subsystem Device Driver requires a minimum of 2 Fibre
Channel adapters. The maximum number of Fibre Channel adapters
supported is 16 for a total of 16 Fibre Channel ports.