HP Hitachi Dynamic Link Manager Software - Manual (Page 261)

3. Creating an HDLM Environment
237
Make sure that
md0 : active
and the HDLM devices are displayed.
3.9.3 Using HDLM in an md Device Environment
This subsection describes how to migrate an environment where the md devices were
constructed by using SCSI devices to an environment where the md devices were
constructed by using HDLM-managed devices.
If the MULTIPATH function is not used for md devices, perform the procedure
described in (1) When the MULTIPATH Function Is Not Being Used for md Devices.
If the function is used, perform the procedure described in (2) When the MULTIPATH
Function Is Being Used for md Devices.
(1) When the MULTIPATH Function Is Not Being Used for md Devices
The following explains the procedure to use HDLM in an md device environment
where the MULTIPATH function is not being used. The example below assumes that
the RAID functionality is being used for md devices.
In this procedure, the device
/dev/md0
on
/dev/sdh1
and
/dev/sdi1
is migrated
to the device
/dev/md0
on
/dev/sddlmaa1
and
/dev/sddlmab1
. Use the
following procedure to configure the environment shown in Figure 3-26: Device
Configuration Where an md Device on a SCSI Device Is Migrated to an HDLM Device
(An Environment that Uses the md Device's RAID Functionality).
Figure 3-26: Device Configuration Where an md Device on a SCSI Device Is
Migrated to an HDLM Device (An Environment that Uses the md Device's RAID
Functionality)
To migrate
/dev/md0
:
1. Stop all applications that are using the existing md device.