What is this error?

[¿what is this error?]

Jan 28 03:51:22 cespp01 vmunix: SCSI: Read error -- dev: b 31 0x020000, errno: 126, resid: 1024,
Jan 28 03:51:22 cespp01 vmunix: blkno: 8, sectno: 16, offset: 8192, bcount: 1024.

[Geoff Wild]

Could mean a failing disk...

Check these links:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=945029

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=946406

How to decode those device numbers?

e.g 0x1f0d0700

The first 2 hex digits (1fhex - 31decimal) indicate the major device number. Do an lsdev and look for "31". You will find that major block device 31 is SCSI disk. Thus this is a /dev/dsk device node.

The next 2 hex digits (0dhex - 13 decimal) indicate the bus "instance" number or controller number; "c13" in this case.

The next hex digit (0) indicates the SCSI ID or target. "t0" in this case.

The next hex digit (7) indicates the LUN (d7) in this case.

The remaining 2 hex digits are device driver specific.

In summary, 0x1f0d0700 decodes to
/dev/dsk/c13t0d7.


So for yours, 0x020000 - should be c2t0d0

Try a dd:

dd if=/dev/rdsk/c2t0d0 of=/dev/null bs=64k

If it fails, then you may need to replace it.

Rgds...Geoff

[Arunvijai_4]

Hello,

This could be due to corrupted disk among your disks. You can easily find it out by,

# dd if=/dev/rdsk/cXtYdZ of=/dev/null bs=64K count=1000

and # fsck -F vxfs -o full -y /dev/vg01/<>

-Arun

[HGN]

Hi

The error maybe because of bad sector on the disk. you can try to do a dd and find out the response

# dd if=/dev/rdsk/xxxxx of=/dev/null

If you get more errors you need to open a case with HP if it a internal disk or a disk on the enclosures.

Rgds

HGN

[Dan Maul]

here's a good site to convert Hex and Dex numbers

http://www.hypersolutions.org/pages/hex.html

[Sivakumar TS]

Hi,

Simply it is time to take a full backup !

One of you hard drive is Failing and developed badblocks.

For the above error, the c2t0t0 has got come bad blocks and system is unable to read data from that.

do a "dd" read test by, #dd if=/dev/rdsk/c2t0t0 of=/dev/null and ensure the disk errors.

AND do the needful to replace the disk.

With Regards,

Siva.