HP Hitachi Dynamic Link Manager Software - Manual (Page 267)

Delete the ARRAY line that includes the same name as the md device
name (md0) created in step 8. In the following example, the underlined
lines are to be deleted.
# cat /etc/mdadm.conf
DEVICE /dev/sdo1 /dev/sdh1
ARRAY /dev/md0 level=multipath num-devices=2 UUID=6b2ec21b:
06d0f50b:bbf04d32:1e00b09a auto=yes
ARRAY /dev/md0 level=linear num-devices=1 UUID=426a9f1c:
9cfa6310:6aa9a80b:11ea2102
10
.
Edit the /etc/mdadm.conf file to add auto=yes to the ARRAY line in the
configuration file:
DEVICE /dev/sdo1 /dev/sdh1
ARRAY /dev/md0 level=linear num-devices=1 UUID=426a9f1c:
9cfa6310:6aa9a80b:11ea2102 auto=yes
11
.
On the DEVICE line of the configuration file, change a SCSI device name
to an HDLM device name.
Based on the correspondence between the HDLM devices and SCSI
devices checked in step 6, change the SCSI device names on the DEVICE
line to the HDLM device names.
Before the correction:
DEVICE /dev/sdo1 /dev/sdh1
After the correction:
DEVICE /dev/sddlmaa1
When you edit the DEVICE line, change only the device names. Do not
change the partition numbers.
12
.
Execute the following command to deactivate the md device:
# mdadm -Ss /dev/md0
13
.
Make sure that the md device has been deactivated.
In the following example, the LINEAR function is used for the md device:
# cat /proc/mdstat
Personalities : [linear] [multipath]
#
unused devices: <none>
Make sure that md0 : active is not displayed.
#
Although [multipath] will be displayed until the host is restarted,
there are no operational problems.
14
.
Activate the md device and add a path to the LU.
Perform steps 15 to 19 in
When the MULTIPATH Function Is Not Being
Used for md Devices on page 3-188 .
Creating an HDLM Environment
3-195
Hitachi Dynamic Link Manager User Guide for Linux ®