HP Hitachi Dynamic Link Manager Software User Manual

Page 319

# cat /etc/mdadm.conf

DEVICE /dev/sddlmaa1

ARRAY /dev/md0 level=linear num-devices=1 UUID=426a9f1c:

9cfa6310:6aa9a80b:11ea2102 auto=yes

ARRAY /dev/md0 level=multipath num-devices=2

UUID=8db667ff:e7472a25:3a84b801:025a6a57

Edit the /etc/mdadm.conf file to add auto=yes to the ARRAY line in the

configuration file:

DEVICE /dev/sdo1 /dev/sdh1

ARRAY ARRAY /dev/md0 level=multipath num-devices=2

UUID=8db667ff:e7472a25:3a84b801:025a6a57 auto=yes

On the DEVICE line of the configuration file, change an HDLM device name

to a SCSI device name.
Based on the correspondence between the HDLM devices and SCSI

devices checked in step 5, change the HDLM device names on the DEVICE

line to the SCSI device names.

Before the correction:

DEVICE /dev/sddlmaa1

After the correction:

DEVICE /dev/sdh1 /dev/sdo1

Specify all SCSI devices that correspond to HDLM devices.
When you edit the DEVICE line, change only the device names. Do not

change the partition numbers.

Execute the following command to deactivate the md device:

# mdadm -Ss /dev/md0

Make sure that the md device has been deactivated.
In the following example, the MULTIPATH function is used for the md

device:

# cat /proc/mdstat
Personalities : [linear]

[multipath]

unused devices:

Make sure that md0 : active is not displayed.

Although [linear] will be displayed until the host is restarted, there

are no operational problems.

Activate the md device.
Perform steps 11 to 14 in

Creating an HDLM Environment

3-247

Hitachi Dynamic Link Manager User Guide for Linux

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