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тАО07-09-2003 06:21 AM
тАО07-09-2003 06:21 AM
I would like to know how I can detect disk errors? Which logfiles should I check? What kind of messages?
Of course when a disk is unavailable (ioscan) it has failed. But how to detect a disk which stills seems to work but already produces errors.
Are the errors of an internal disks logged to a different location than the errors of a disk in a autoraid?
Solved! Go to Solution.
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тАО07-09-2003 06:25 AM
тАО07-09-2003 06:25 AM
Re: disk errors
HTH
Marty
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тАО07-09-2003 06:26 AM
тАО07-09-2003 06:26 AM
Re: disk errors
I'd start with /var/adm/syslog. Most all of your disk errors will get logged there. You can also look at dmesg, but that is a ring buffer and not a file. Also your EMS notification will do pretty good too.
JP
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тАО07-09-2003 06:26 AM
тАО07-09-2003 06:26 AM
Re: disk errors
Pete
Pete
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тАО07-09-2003 06:27 AM
тАО07-09-2003 06:27 AM
Re: disk errors
Most of the errors should get logged into your dmesg and /var/adm/syslog/syslog.log. However, you will get more information if you use EMS that comes with Online Diagnostics. Look at the following document on configuring EMS.
http://docs.hp.com/hpux/onlinedocs/B7609-90022/B7609-90022.html
You can even get it configured to email the errors on various subsystems including disks.
-Sri
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тАО07-09-2003 06:28 AM
тАО07-09-2003 06:28 AM
Re: disk errors
1.You can check with xstm using verify utility;
2. Run the following command, any errors indicate a disk problem:
dd if=/dev/rdsk/device of=/dev/null bs=32K
Elena.
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тАО07-09-2003 06:28 AM
тАО07-09-2003 06:28 AM
Re: disk errors
If looking to syslog.log usual 'bad' events are:
- power fails
- SCSI resets
- SCSI hangs
- SCSI timeouts
for disk arrays use special management software to take logs out of disk array
Eugeny
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тАО07-09-2003 06:29 AM
тАО07-09-2003 06:29 AM
Re: disk errors
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тАО07-09-2003 06:32 AM
тАО07-09-2003 06:32 AM
Re: disk errors
"If the - argument is
specified, dmesg computes (incrementally) the new messages since the
last time it was run and places these on the standard output. This is
typically used with cron (see cron(1)) to produce the error log
/var/adm/messages by running the command:
/usr/sbin/dmesg - >> /var/adm/messages
every 10 minutes."
Pete
Pete
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тАО07-09-2003 06:32 AM
тАО07-09-2003 06:32 AM
Re: disk errors
First and foremost, keep an eye on /var/adm/syslog/syslog.log
Outside of that I would suggest using stm.
If you have a particular disk that you think is whigging out, I would suggest doing an lvdisplay -v on that lvol and looking for stale extents. If you have a small environment, this might be a good practice to do occassionally on all of your lvols.
As for the autoraid units, I don't have a lot of experience with them. They should show up in syslog.log also, just like any other disk. I do beleive however, that some autoraid units do come with special tools for monitoring the array for problems. Like I said, though I don't have a lot of experience with that.
Hope this helps!
-Bryan