HP StorageWorks Continuous Access EVA Administrator Guide (T3687-96043, December 2005)

# vgimport <volumeGroupName> <deviceSpecialFiles>
Example:
# vgimport /dev/vg09 /dev/dsk/c18t0d /dev/dsk/c18t1d0
/dev/dsk/c25t0d0
• You can then attempt to display this virtual group using # vgdisplay -v /dev/vg09.If
this returns an error about "Volume group not activated" then you will need to activate it
using the vgchange command.
# vgchange -a y <volumeGroupName>
Example:
# vgchange -a y /dev/vg09
• You may re ceive errors trying to mount the failed over volume (an error stating the volume is
corrupt). You will need to run a file system check (this is fairly typical as the file sy stem may
nothavebeenproperlydismounted).Youcanrepairthedeviceusingthefsck command.
# fsck <logicalVolumeName>
Once the devices are clean, the devices can be mounted.
NOTE:
VolumeGroupName is the name of the volume group you originally created at the local site.
The
DeviceSpecialFiles are from the ioscan in the form of /dev/dsk/c_t_d/. For consistency,
configure the same
DeviceSpecialFiles withthesamevolumegroups,logicalvolumes,andfile
systemsforthefailed–overLUNsattheremotesitewiththesameLUNsatthelocalsite.
IBM AIX procedure to resume I/O
1. If the remote hosts are shut down, boot them now. Booting the hosts enables AIX to recognize
the drives.
2. If the remote hosts are not shut d own, use the following commands to recognize the drives and
verif y that they are present:
cfgmgr –v
lsdev –Cc disk
Use the following commands to access file systems on the failed–over virtual d isks:
importvg –y VolumeGroupName hdiskx
mount all
NOTE:
VolumeGroupName is the name of the volume group you originally 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 you (for example, vg00) .
Linux procedure to resume I/O
1. Reboot th
e ser vers at the remote site.
2. Remount the file system.
Also see Bootless failover using Linux and LVM.
Novell NetW are procedure to resume I/O
• If the remote hosts are shut down, boot them now. If you are using traditional NetWare volumes,
booting the hosts allows Novell NetWare to recognize the d rives and automatically mount the
volumes. If you are using NSS logical volumes, booting the hosts will recognize the NSS pools
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Operatingsystemspecifics