suspect disk

[TMcB]

Hi folks

Does anyone know of a way I can check to see f one of my disks is faulty
eg by scanning it, etc.

It is mounted OK, but funny things have been hapenning to some files, and I would like to rule out a disk fault.

Thanks

[Patrick Wallek]

A couple of things you can do:

1) Use STM (cstm,xstm) to look at the disk and look at its logs.

2) You can do a dd of the disk, and if the dd doesn't complete successfully then you probably have a problem.

# dd if=/dev/dsk/c?t?d0 of=/dev/null bs=512k

[Sanjay_6]

Hi Terry,

you can do a dd on the disk and check if the disk is having any problem,

dd if=/dev/rdsk/cxtydz of=/dev/null bs=1024k

If this completes with the message so many records in and so many record out, it should be okay. Else you should see some errors.

Hope this helps.

Regds

[Helen French]

Hi,

Several things to try:

1) Run STM and check the disk utilities. Check out the log files.

2) Run dd command:

# dd if=/dev/dsk/cxtxdx of=/dev/null

3) Run fsck - for file system checks, if LVM. Check it for all file systems with full option ( fsck -o full)

4) Check the output of 'diskinfo', 'pvdisplay' and 'ioscan -fnC disk'

5) Check disk through offline diag.

HTH,
Shiju

[TMcB]

Hi

What does dd do?

[Patrick Wallek]

dd will go through the entire disk and read each block, and then discard into /dev/null (ie. bit bucket). If dd runs into a problem reading one of the blocks on the disk, then it will immediately error out.

[Helen French · Accepted solution]

Hi,

This is a guide for dd:

http://www.docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90680/B2355-90680_top.html&con=/hpux/onlinedocs/B2355-90680/00/00/67-con.html&toc=/hpux/onlinedocs/B2355-90680/00/00/67-toc.html&searchterms=dd&queryid=20020212-070303

HTH,
Shiju

[TMcB]

Thanks everyone
It came back with no errors