HP XP P9500 Storage - Manual (Page 153)

For details on how to re-install HDLM, see Performing a Re-installation of
HDLM on page 3-86 . For details on how to upgrade-install HDLM, see
Performing an Upgrade Installation of HDLM on page 3-91 .
Operations Required for Devices to Be Managed by HDLM
Before performing an upgrade installation or re-installation of HDLM, you
must unmount the HDLM devices that correspond to HDLM-managed devices,
and then back up the HDLM-managed devices.
1
.
Terminate the processes of all applications that access the disks managed
by HDLM.
2
.
Unmount the HDLM devices.
If HDLM-managed devices have been mounted by specifying HDLM
devices, unmount them.
3
.
Back up the HDLM-managed disks (for example, to tape).
Perform this operation if necessary.
Deactivating the md Devices
You must deactivate any md devices that are being used before re-installing
or upgrading HDLM.
1
.
Execute the following command to deactivate the md devices:
# mdadm -S --scan
2
.
Execute the following command to make sure that the md devices have
been deactivated. In the following example, RAID1 (mirroring) is used:
# cat /proc/mdstat
Personalities : [raid1]
unused devices:
Make sure that mdx : active is not displayed.
Deactivating the Volume Group
If you are using a logical volume on an HDLM device, you must deactivate the
volume group before re-installing or upgrading HDLM.
1
.
Unmount the logical volume on the HDLM device.
In the following example, the logical volume subject to the move has
been mounted on /mnt/lvol1:
# umount /mnt/lvol1
2
.
Deactivate the volume group.
In the following example, the logical volume subject to the move belongs
to the vg01 volume group:
# vgchange -an vg01
Creating an HDLM Environment
3-85
Hitachi Dynamic Link Manager User Guide (for Linux(R))