HP P6000 Continuous Access Implementation Guide (T3680-96431, August 2012)

# mknod /dev/vg09/group c 64 0x090000
b. After the folders are created, the disks appear, and the special files are present, use the
vgimport command to create the virtual group:
# vgimport <volumeGroupName> <deviceSpecialFiles>
Example:
# vgimport /dev/vg09 /dev/dsk/c18t0d /dev/dsk/c18t1d0
/dev/dsk/c25t0d0
c. To display this virtual group using # vgdisplay -v /dev/vg09. If a Volume group
not activated error is displayed, you must activate the volume group using the
vgchange command:
# vgchange -a y <volumeGroupName>
Example:
# vgchange -a y /dev/vg09
d. If you encounter errors while trying to mount the failed over volume (such as an error
indicating the volume is corrupt), run a file system check. This is fairly typical as the file
system may not have been dismounted properly. You can repair the device using the
fsck command:
# fsck <logicalVolumeName>
When the devices are error-free, they can be mounted.
NOTE: The <volumeGroupName> is the name of the volume group you originally
created at the local site.
The deviceSpecialFiles are from the ioscan in the form /dev/dsk/c_t_d/.
For consistency, configure the deviceSpecialFiles for the failed over LUNs at the
remote site with the same volume groups, logical volumes, and file systems as the LUNs
at the local site.
IBM AIX
• If the remote hosts are shut down, boot them now.
Booting the hosts enables AIX to recognize the drives.
• If the remote hosts are running, use the following commands to recognize the drives and verify
that they are present:
cfgmgr –v
lsdev –Cc <disk>
Use the following commands to access file systems on the failed–over virtual disks:
importvg –y <volumeGroupName> hdiskx
mount all
NOTE: The <volumeGroupName> is the name of the volume group you created at the local
site, and x is the number of the hdisk assigned to the failed over virtual disk. If the –y
<volumeGroupName> parameter is omitted, AIX creates a default volume group name (for
example, vg00).
Linux
To resume I/O in Linux:
Resuming host I/O after failover 119