Specifications

18. Select an appropriate physical partition size for the volume group, using the
Physical Partition Size.
Note: AIX limits the number of physical partitions to 1016 per logical volume.
This limitation does not apply to AIX 4.3.1.
The default physical partition size is 4 MB. Choose this value to make the
most efficient use of the physical hard disk size. See your host system
documentation for more information.
19. Type smit chvg to change the volume group on the selected hdisk.
20. Click No for the Active Volume Group Automatically.
21. Click No for the A Quorum option of disk required to keep the volume group
online option.
22. Type varyonvg <volumegroup_name> to vary the volume group online.
23. If you are using the journaled file system (JFS), type smit crjfs to create the
JFS for the selected hdisk.
Note: Click No for the Mount Automatically option at the system restart
option.
24. Type mount <mount_point> to mount the file system and verify access from the
selected host system.
Saving data on the ESS
Perform the following steps to preserve the data that is stored on an ESS that was
previously installed and connected to a host system. This procedure does not erase
the data on the ESS, but it removes the volume groups from the host system.
1. Type umount to unmount all file systems from all host systems connected to the
ESS.
2. Type fsck on each of the file systems on the ESS to verify the file system
integrity.
3. Type varyoffvg to vary off all the ESS volume groups from all of the host
systems connected to the ESS.
4. Type exportvg to remove all of the ESS volume groups from all the host
systems connected to the ESS.
5. Type rmdev -ld hdiskx to delete all physical volumes (hdisks) on each host
system that is associated with the ESS.
6. Be sure you have completed step 3 on page 65 of the attachment procedures.
Restoring data on the ESS
Perform the following steps to restore access to the data that was originally
installed on a host system. This procedure assumes that you have preserved the
data by following the instructions in “Saving data on the ESS”.
1. Check to be sure that the ESS physical volumes (hdisks) are available.
Type lsdev -Cc disk to display the hdisks on the host system.
2. Type importvg to restore the ESS volume groups to the applicable host systems
that are connected to the ESS, one system at a time.
3. Type smit chvg to verify that No is selected for the Activate Volume Group
Automatically and A Quorum and of disks required to keep the volume
group online?
4. Type varyonvg to vary-on the ESS volume groups to the applicable host
systems connected to the ESS. Perform the steps one system at a time.
66 ESS Host Systems Attachment Guide