Problem: Delay construction of multipath device (/
dev/dm-3)
I have a server and all works well at the beginning
and I have no problem with multipath:
- Server SunX4100
- Sun Storage Sun Storage Teck 2540
- Redhat Enterprise 5.2 (2.6.18-128.1.16.el5)
- 1Seul fiber card (Dual Port) optical Qlogic
(qla2xxx)
-
2 Qlogic Fiber Switch 5600
�
# multipath -v2 -ll
mpath2 (3600a0b80004946b80000083b4a4a0137) dm-3 SUN,LCSM100_F
[size=305G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
�\_ 3:0:0:1� sdf 8:80� [active][ready]
\_ round-robin 0 [prio=0][enabled]
�\_ 4:0:0:1� sde 8:64� [active][ghost]
mpath1 (3600a0b8000493fb6000008674a4a0130) dm-2 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][enabled]
�\_ 4:0:0:0� sdd 8:48� [active][ready]
\_ round-robin 0 [prio=0][enabled]
�\_ 3:0:0:0� sdc 8:32� [active][ghost]
�
My fstab�:
/dev/VolGroup00/LogVol00 /���������������������� ext3��� defaults������� 1 1
LABEL=/boot������������ /boot������������������ ext3��� defaults������� 1 2
tmpfs��������� ���������/dev/shm��������������� tmpfs�� defaults������� 0 0
devpts����������������� /dev/pts��������������� devpts� gid=5,mode=620� 0 0
sysfs������������������ /sys������������������� sysfs�� defaults������� 0 0
proc������������������� /proc������������� �����proc��� defaults������� 0 0
/dev/dm-2���������� /home��������������������� auto�� defaults���� 0 0
/dev/dm-3���������� /data��������������������� auto�� defaults���� 0 0
/dev/VolGroup00/LogVol01 swap������������������� swap��� defaults������� 0 0
# df -h
Filesystem����������� Size� Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
���������������������� 64G�� 20G�� 42G� 33% /
/dev/sda1������������� 99M�� 24M�� 71M� 25% /boot
tmpfs���������������� 2.0G���� 0� 2.0G�� 0% /dev/shm
/dev/dm-2������������ 240G� 148G�� 93G� 62% /home
/dev/dm-3������������ 305G� 115G� 191G� 38% /data
�
After a while, the boot I got the message that
displays:
Mounting local filesystems: mount: special device /
dev/dm-3 does not exist
/ sbin / mount.gfs gfs_controld not running error mounting
lock proto lock_dlm
�
After starting the server I do:
# multipath -v2 -ll
mpath1 (3600a0b8000493fb6000008674a4a0130) dm-2 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
�\_ 4:0:0:0� sdd 8:48� [active][ready]
�
And
# df -h
Filesystem���� �������Size� Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
���������������������� 64G�� 20G�� 42G� 33% /
/dev/sda1������������� 99M�� 24M�� 71M� 25% /boot
tmpfs���������������� 2.0G���� 0� 2.0G�� 0% /dev/shm
/dev/dm-2������������ 240G� 148G�� 93G� 62% /home
�
I tried to solve the problem
When I do:
# service multipathd restart
Then
# multipath -v2 -ll
mpath2 (3600a0b80004946b80000083b4a4a0137) dm-3 SUN,LCSM100_F
[size=305G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
�\_ 3:0:0:1� sdf 8:80� [active][ready]
\_ round-robin 0 [prio=0][enabled]
�\_ 4:0:0:1� sde 8:64� [active][ghost]
mpath1 (3600a0b8000493fb6000008674a4a0130) dm-2 SUN,LCSM100_F
[size=240G][features=1 queue_if_no_path][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][enabled]
�\_ 4:0:0:0� sdd 8:48� [active][ready]
\_ round-robin 0 [prio=0][enabled]
�\_ 3:0:0:0� sdc 8:32� [active][ghost]
�
I have a good result and I do mount-a.
I made the upgrade to Redhat 5.4 (2.6.18-164.el5) but I
have not solved the problem. It must be done at boot
How I can do. I can give you my "sosreport" if you want.
Thanks
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