disk error

[Daniel Gizaw]

Is the below error message from dmesg serious? how can I fix it?

Thank you

Daniel

SCSI: Write error -- dev: b 31 0x043000, errno: 126, resid: 262144,
blkno: 67072, sectno: 134144, offset: 68681728, bcount: 262144.

SCSI: Write error -- dev: b 31 0x043000, errno: 126, resid: 26624,
blkno: 774, sectno: 1548, offset: 792576, bcount: 26624.
LVM: Failed to automatically resync PV 1f043000 error: 5

SCSI: Read error -- dev: b 31 0x043000, errno: 126, resid: 2048,

SCSI: Read error -- dev: b 31 0x053000, errno: 126, resid: 2048,
blkno: 8, sectno: 16, offset: 8192, bcount: 2048.
blkno: 8, sectno: 16, offset: 8192, bcount: 2048.
LVM: Recovered Path (device 0x1f043000) to PV 1 in VG 2.
LVM: Recovered Path (device 0x1f053000) to PV 1 in VG 2.
LVM: Restored PV 1 to VG 2.
LVM: Recovered Path (device 0x1f043000) to PV 1 in VG 2.
LVM: Restored PV 1 to VG 2.
LVM: Failed to automatically resync PV 1f043000 error: 5

[PIYUSH D. PATEL · Accepted solution]

Daniel,

Unmount the filesystem and run fsck on the filesystem and check for any errors.

Seems to be some problem with the disk media. Good option is to replace the disk but for the timebeing you can format the disk and reuse it.
Take proper backup and then restore the data after formatting.

Good luck,
Piyush

[A. Clay Stephenson]

Yes, it's almost certainly serious. At the very least /dev/dsk/c4t3d0 has problems (disk is probably failing)and /dev/dsk/c5t3d0 may have problems as well. Did a drive enclosure suffer a momentary power failure? Were cables unplugged? The system seems to have recovered but VG2 has some stale PE's. Try a vgsync /dev/vg02. If VG2 is mirrored then this is no big deal but if not then I hope you have recent/reliable backups.

[Daniel Gizaw]

Piyush,
Thank you very much for your fast response.
How can I identify the disk?

ioscan does not show me any error.

Daniel

[James R. Ferguson]

Hi Daniel:

The disk(s) in question are c4t3d0 and c5t3d0.

They are identified in hexadecimal notation (0x) with the device kind (a SCSI disk) noted as the first two hex-digits ('1f' or decimal 31) or as 'dev: b 31' for a block device, kind-31.

The general device format is:

MMBBTLFF

Where: MM = Major number
BB = Bus number
T = Target
L = LUN
FF = Flags

Hence, the major number = 0x1f = 31 in decimal (a disk);
...and the Bus is the card instance number = 04
...and the Target = 3 or the device???s SCSI ID
...and the LUN = 0 or the logical unit number
...and therefore the device is /dev/dsk/c4t3d0

Regards!

...JRF...

[PIYUSH D. PATEL]

Daniel,

You may have two or more disks in your volume group vg02.

The device names for the disks are /dev/dsk/c3t4d0 and /dev/dsk/c3t5d0.
#vgdisplay -v /dev/vg02

ioscan would not give you any errors since the system can still access the disks but the system is having problems reading/writing to these disks. You may have temporary problems but you can get the system checked up by a HP engineer if you are getting these errors repeatedly.

Thanks,
Piyush

[PIYUSH D. PATEL]

Daniel,

You may have two or more disks in your volume group vg02.

The device names for the disks are /dev/dsk/c3t4d0 and /dev/dsk/c3t5d0.
#vgdisplay -v /dev/vg02

ioscan would not give you any errors since the system can still access the disks but the system is having problems reading/writing to these disks. You may have temporary problems but you can get the system checked up by a HP engineer if you are getting these errors repeatedly.

Thanks,
Piyush

[PIYUSH D. PATEL]

Daniel,

You may have two or more disks in your volume group vg02.

The device names for the disks are /dev/dsk/c3t4d0 and /dev/dsk/c3t5d0.
#vgdisplay -v /dev/vg02

ioscan would not give you any errors since the system can still access the disks but the system is having problems reading/writing to these disks. You may have temporary problems but you can get the system checked up by a HP engineer if you are getting these errors repeatedly.

Thanks,
Piyush

[Daniel Gizaw]

Thank you all for the good education I got. I will do fsck first and call HP to replace the disk.


Thank you agian

Daniel

[Dario_1]

Daniel:

You got good answers, but check this post. It has very good answers regarding your situation.

Good Luck!!

DR

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xf84063f96280d711abdc0090277a778c,00.html