Viewing Multipath I/O Status - Novell LINUX ENTERPRISE SERVER 10 SP3 - STORAGE ADMINISTRATION GUIDE 2-23-2010 Administration Manual

5 Use a text editor to add a new alias definition for the device in the
such as
6 Create a partition table for the device by entering
fdisk /dev/dm-8
7 Trigger udev by entering
echo 'add' > /sys/block/dm-8/uevent
This generates the device-mapper devices for the partitions on
8 Create a file system and label for the new partition by entering
mke2fs -j /dev/dm-9
tune2fs -L oradata3 /dev/dm-9
9 Restart DM-MP to let it read the aliases by entering
/etc/init.d/multipathd restart
10 Verify that the device is recognized by
multipath -ll
11 Use a text editor to add a mount entry in the
At this point, the alias you created in
Add the mount entry the
reboot to
LABEL=oradata3
12 Create a directory to use as the mount point, then mount the device by entering
md /oradata3
mount /oradata3

5.12 Viewing Multipath I/O Status

Querying the multipath I/O status outputs the current status of the multipath maps.
The
multipath -l
was run. It does not run the path checker.
The
multipath -ll
current status information. This option always the displays the latest information about the path
status.
1 At a terminal console prompt, enter
multipath -ll
This displays information for each multipathed device. For example:
3600601607cf30e00184589a37a31d911
[size=127 GB][features="0"][hwhandler="1 emc"]
\_ round-robin 0 [active][first]
\_ 1:0:1:2 sdav 66:240
\_ 0:0:1:2 sdr
\_ round-robin 0 [enabled]
\_ 1:0:0:2 sdag 66:0
\_ 0:0:0:2 sdc
72 SLES 10 SP3: Storage Administration Guide
.
oradata3
/dev/dm-9
option displays the current path status as of the last time that the path checker
option runs the path checker, updates the path information, then displays the
65:16
8:32
by entering
multipathd
file.
/etc/fstab
Step 5 is not yet in the
path, then change the entry before the next time you
[ready ][active]
[ready ][active]
[ready ][active]
[ready ][active]
/etc/multipath.conf
.
dm-8
directory.
/dev/disk/by-label
file,