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Old 06-21-2007, 05:32 AM   #1
dylan.goh
LQ Newbie
 
Registered: Jun 2007
Posts: 3

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Local filesystem automatically unmounted


Redhat 4 U4
SUN V40z server
Running Veritas Cluster and Volume Manager on shared disk.

On one of the node, local filesystem (hardware raid, local, EXT3) /boot and /oracle often unmount automatically without any messages in /var/log/messages file.

Sometime it happen after 1 hour the system reboot, so time it will stay still for 2 days.

The following are messages that i not sure it related to my problem:

Jun 14 13:03:44 xxx kernel: mtrr: type mismatch for fd000000,800000 old: write-back new: write-combining

Jun 14 12:51:56 xxx kernel: SCSI error : <0 2 0 0> return code = 0x40000
Jun 14 12:51:56 xxx kernel: SCSI error : <0 2 1 0> return code = 0x40000

Jun 14 12:47:19 xxx kernel: vxfs: disagrees about version of symbol struct_module
Jun 14 12:47:19 xxx kernel: vxportal: no version for "vx_free" found: kernel tainted.

Jun 14 12:47:19 xxx kernel: kjournald starting. Commit interval 5 seconds
Jun 14 12:47:19 xxx kernel: EXT3 FS on sda1, internal journal
Jun 14 12:47:19 xxx kernel: EXT3-fs: mounted filesystem with ordered data mode.
Jun 14 12:47:19 xxx kernel: kjournald starting. Commit interval 5 seconds
Jun 14 12:47:19 xxx kernel: EXT3-fs warning: maximal mount count reached, running e2fsck is recommended
Jun 14 12:47:19 xxx kernel: EXT3 FS on sdb2, internal journal
Jun 14 12:47:19 xxx kernel: EXT3-fs: mounted filesystem with ordered data mode.

Jun 14 12:47:15 xxx kernel: vxdmp: module license 'Proprietary. Send bug reports to support@veritas.com' taints kernel.
Jun 14 12:47:15 xxx kernel: VxVM vxdmp V-5-0-34 added disk array OTHER_DISKS, datype = OTHER_DISKS
Jun 14 12:47:15 xxx kernel: VxVM vxdmp V-5-0-34 added disk array 14383, datype = TagmaStore
Jun 14 12:47:15 xxx kernel: VxVM vxdmp V-5-0-34 added disk array 1437C, datype = TagmaStore


Thanks in advance if you are looking at it now.

Regards,
Dylan
 
Old 06-21-2007, 05:33 AM   #2
dylan.goh
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Registered: Jun 2007
Posts: 3

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fstab:
# This file is edited by fstab-sync - see 'man fstab-sync' for details
LABEL=/ / ext3 defaults 1 1
LABEL=/boot1 /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults 0 0
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
/dev/sdb2 /oracle ext3 defaults 0 0
LABEL=SWAP-sda2 swap swap defaults 0 0
LABEL=SWAP-sda3 swap swap defaults 0 0
/dev/hdc /media/cdrom auto pamconsole,exec,noauto,managed 0 0
/dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0


mtab:
/dev/sda5 / ext3 rw 0 0
none /proc proc rw 0 0
none /sys sysfs rw 0 0
none /dev/pts devpts rw,gid=5,mode=620 0 0
usbfs /proc/bus/usb usbfs rw 0 0
tmpfs /dev/vx tmpfs rw,size=4k,nr_inodes=2097152,mode=0755 0 0
tmpfs /dev/vx tmpfs rw,size=4k,nr_inodes=2097152,mode=0755 0 0
tmpfs /dev/vx tmpfs rw,size=4k,nr_inodes=2097152,mode=0755 0 0
none /dev/shm tmpfs rw 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
nfsd /proc/fs/nfsd nfsd rw 0 0


thanks.
 
Old 04-10-2008, 01:37 PM   #3
cepal
LQ Newbie
 
Registered: Jan 2008
Posts: 7

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got a solution?

Hello,
have you got a solution for this? As I am having the same problem.

Thanks,
CePal
 
Old 04-14-2008, 10:50 PM   #4
dylan.goh
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Registered: Jun 2007
Posts: 3

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no clue on actual problem.

However, after change the root password, no more occurance.

possibly human error, but no evidence on tat.

good luck.
 
Old 04-15-2008, 03:52 AM   #5
cepal
LQ Newbie
 
Registered: Jan 2008
Posts: 7

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Quote:
Originally Posted by dylan.goh View Post
no clue on actual problem.

However, after change the root password, no more occurance.

possibly human error, but no evidence on tat.

good luck.
Well maybe I should tell more of "my story". On RH4 / VxVM 4.1 I needed to refresh space optimized instant snapshots on couple of boxes. I knew how to do it via VEA (the java GUI for Veritas Volume Manager) but I was told "just to use the 'vxsnap refresh' command".

So I did so on a production box, not explicitly requesting "not to start syncing", which is by default on.

As a result, the command got stuck, the system load went high and the VxVM subsystem got stuck by not implementable request. Of course, ^C didn't solve that out and commands like "df" started to getting stuck, while the original VXFS filesystem was still working well.

After reboot which had to have been forced at the end as the VxVM subsystem would not unmount the volumes waiting for nonsense synchronization, during boot the VXFS mounts would not have mounted and boot got stuck on "Mounting filesystems". Luckily, this could have been canceled by ^C.

Strange was this: I was now able to start VEA, remove the broken snapshots, then mount the VXFS filesystems, and of course, last but not least, recreate the instant snapshots.

So a little lesson for me and anyone who wants to use vxsnap: be careful about the synchronization implicitly on.

Pavel

update: After reboot I had to run FSCK on the VXFS filesystems before I was able to mount them, even though no problems found during fsck...

Last edited by cepal; 04-15-2008 at 11:05 AM.
 
  


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