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

1. On each host, log on to an account that has administrative privileges.
2. Select Programs > Administrative Tools > Computer Management.
3. Click Disk Management.
4. After Disk Management has initialized, select Actions > Rescan Disks. If the units fail to appear,
press F5 (Refresh).
All of the failed over units are displayed in the right pane.
Red Hat and SUSE Linux LifeKeeper clusters
Red Hat Linux and SUSE Linux LifeKeeper clusters must be zoned so that clustered hosts can see
only one controller port per fabric. The operating system host mode of the controller must be set
to Linux.
Bootless failover using LVM with Linux
This section describes how to perform a bootless DR group failover using Logical Volume Manager
(LVM) with Linux. The section includes separate procedures for standalone LVM and LVM with
clusters (SUSE SLES 8 running LifeKeeper 4.4.3). Perform the procedures for the source host, and
then perform the procedures for the destination host.
NOTE:
• These procedures are not valid for unplanned failovers.
• The term bootless means that after the LUNs are first presented to a destination host (which
requires an initial reboot), no additional reboot of that host is required.
Source host procedure
Use one of the following procedures to perform a bootless DR group failover on the source host.
If you are not running LifeKeeper:
1. From the source host, stop I/O to the LUNs.
Allow enough time for the I/O to complete before proceeding to the next step.
2. Unmount the volumes in the DR group.
Example: unmount /mounts/lvol1
3. Change the status of the LUNs to inactive using the vgchange <volumeGroupName> –a
n command.
Example: vgchange vg01 –a n
4. Make the group unknown to the system using the vgexport command.
Example: vgexport vg01
5. Perform a failover of the DR group.
6. Depending on the number of LUNs, take one of the following actions to prevent HP Secure
Path from detecting a failed disk:
• For individual LUNs, run spmgr quiesce –p path for each path visible to the LUNs.
• For all LUNs at once, run spmgr set –p off to turn off path verification for all LUNs
visible to the system.
If you are running LifeKeeper 4.4.3 clusters:
1. Take your resources out of service with LifeKeeper.
2. From the system console:
a. Issue the mount command to verify that the volume is unmounted.
b. Issue the vgscan command to verify that the volume group is exported.
122 Operating system procedures