HP Hitachi Dynamic Link Manager Software - Manual (Page 327)

3. Creating an HDLM Environment
303
When md devices have been constructed by using SCSI devices, if you do not use the
MULTIPATH function for the md devices, perform the procedure described in
(1) Migrating to md Devices for which the MULTIPATH Function Is Not Used. If you
want to use the MULTIPATH function for the md devices, perform the procedure
described in (2) Migrating to md Devices for which the MULTIPATH Function Is
Used.
(1) Migrating to md Devices for which the MULTIPATH Function Is Not Used
This section describes the procedure for migrating an environment where the md
devices were created on an HDLM device to an environment where the md devices
were created on a SCSI device, by using an example where the RAID functionality is
used for the md devices.
In this procedure, the device
/dev/md0
on
/dev/sddlmaa1
and
/dev/sddlmab1
is
migrated to the device
/dev/md0
on
/dev/sdh1
and
/dev/sdi1
. Use the following
procedure to configure the environment shown in Figure 3-39: Device Configuration
When an md Device on an HDLM Device Is Moved to a SCSI Device (An Environment
that Uses the md Device's RAID Functionality), carry out the procedure below.
To uninstall HDLM, carry out the steps before the uninstallation.
Figure 3-39: Device Configuration When an md Device on an HDLM Device Is
Moved to a SCSI Device (An Environment that Uses the md Device's RAID
Functionality)
To migrate
/dev/md0
:
1. Stop the host and change the multi-path configuration to a single-path
configuration.
2. Start the host.
3. Stop all applications that are using the existing md device.