HP Hitachi Dynamic Link Manager Software - Manual (Page 266)

5
.
Specify the settings required for the md device, and then install HDLM.
Perform steps 5 to 12 in
When the MULTIPATH Function Is Not Being Used
for md Devices on page 3-188 .
6
.
Check the correspondence with HDLM device.
Execute the HDLM-configuration definition utility dlmcfgmgr with the -v
parameter specified:
# dlmcfgmgr -v
HDevName Management Device Host Channel Target Lun
/dev/sddlmaa configured /dev/sdh 1 0 0 0
/dev/sdo 2 0 0 1
KAPL10302-I /sbin/dlmcfgmgr completed normally.
The HDevName and Device columns display HDLM devices and SCSI
devices, respectively.
7
.
Create an md device.
Based on the correspondence between the HDLM devices and SCSI
devices checked in step 6, create an md device.
When you specify a device name, you must also specify the partition
number that is displayed in step 4.
# mdadm -C /dev/md0 -llinear -f -n1 /dev/sddlmaa1
mdadm: /dev/sddlmaa1 appears to contain an ext2fs file system
size=5238528K mtime=Wed Feb 6 19:17:08 2008
mdadm: /dev/sddlmaa1 appears to be part of a raid array:
level=-4 devices=2 ctime=Wed Feb 6 19:16:07 2008
Continue creating array? y
mdadm: array /dev/md0 started.
8
.
Create a configuration file.
Execute the following command to add an md device definition to the
existing configuration file /etc/mdadm.conf:
# mdadm --detail --scan | grep -w "/dev/md0" >> /etc/mdadm.conf
The following example shows the contents of the created configuration
file:
The underlined part indicates the lines added in this step.
# 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
For details about the contents of the configuration file, see the Linux
documentation or use the man command.
9
.
If the configuration file /etc/mdadm.conf has been recreated, delete the
unnecessary ARRAY line in that configuration file.
3-194
Creating an HDLM Environment
Hitachi Dynamic Link Manager User Guide for Linux ®