Hitachi Dynamic Link Manager, User Manual

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3. Creating an HDLM Environment
242
5238528 blocks [2/2] [UU]
unused devices: <none>
Make sure that
md0 : active
and the HDLM devices are displayed.
18. If you need to mount the file systems on the md device, mount them.
19. Add a path to the LU.
Connect a path to the corresponding LU and then restart the host, or add a path to
an existing LU by performing the procedure described in (3) Adding a Path to an
Existing LU in 4.6.4 Changing the HDLM Device Configuration .
(2) When the MULTIPATH Function Is Being Used for md Devices
The following explains the procedure to use HDLM in an md device environment
where the MULTIPATH function is being used. To use HDLM, you need to disable md
device's MULTIPATH function. The example below explains how to migrate an md
device for which the MULTIPATH function is used to an md device for which the
LINEAR function is used.
In this procedure, the device
/dev/md0
on
/dev/sdo1
and
/dev/sdh1
is migrated
to the device
/dev/md0
on
/dev/sddlmaa1
. Use the following procedure to
configure the environment shown in Figure 3-27: Device Configuration Where an
md Device (An Environment that Uses the md Device's MULTIPATH Function) on a
SCSI Device Is Migrated to an md Device on an HDLM Device .
Figure 3-27: Device Configuration Where an md Device (An Environment that
Uses the md Device's MULTIPATH Function) on a SCSI Device Is Migrated to
an md Device on an HDLM Device
To migrate
/dev/md0
: