topic Re: Hardrive missing suddenly in Operating System - HP-UX

Hardrive missing suddenly

Henry Chua — Thu, 16 Jun 2005 21:07:15 GMT

Hi Guys,

Something seems to have happened to my server hardrives.. I could not access it suddenly.. when i tried to see the status using "ioscan -fnCdisk" .. nothing comes out of it i.e. just idling... but when i reboot, i can see the drives again.. after awhile the drives disappears again. What could have caused this?

Best regards
Henry

Re: Hardrive missing suddenly

Joseph Loo — Thu, 16 Jun 2005 21:12:39 GMT

hi,

could be loose connection between drive bay or loose cable, anything could have happen.

u may like to view /var/adm/syslog/OLDsyslog.log for any unusual activity that happens since u have rebooted.

regards.

Re: Hardrive missing suddenly

KVK — Thu, 16 Jun 2005 21:23:44 GMT

I am suspecting it may be a connection issue .

Can you check the disk SCSI controller is at claimed state in #ioscan -fn ==>if the state is unclaimed or No_HW such things will happen

Are you finding any error at #dmesg &
any disk EMS critical event at
# /var/opt/resmon/log/event.log

if u find the error please post the same

Re: Hardrive missing suddenly

Henry Chua — Thu, 16 Jun 2005 21:45:29 GMT

Thanks guys,

I have attached a section of the OLDsyslog.log before the event. What do u guys make of it. But I couldn't seemt to find
"/var/opt/resmon/log/event.log" in my system. Thank u

Best regards
Henry

Re: Hardrive missing suddenly

Henry Chua — Thu, 16 Jun 2005 21:46:11 GMT

Re: Hardrive missing suddenly

Joseph Loo — Thu, 16 Jun 2005 22:05:39 GMT

hi,

looking at the OLDsyslog, the important info from that log is the b_dev:

bp->b_dev: cb039002
cb(hex)=203(dec) where lsdev indicates 203 is 'sctl' and pointing to /dev/dsk/c3t9d0

bp->b_dev: 1f039000
1f(hex)=31(dec) where lsdev indicates 31 is 'sdisk' and pointing to /dev/dsk/c3t9d0

looks like some problem with the disk, /dev/dsk/c3t9d0.

regards.

Re: Hardrive missing suddenly

KVK — Thu, 16 Jun 2005 22:23:00 GMT

Seems to be /dev/dsk/c3t9d0 device is having a problem .
In the syslog SCSI: First party detected bus hang -- lbolt: 106022734 ==>Error generated .

The above error may appear due to a SCSI ID
(7) clashing . Example two scsi adaptor in one scsi bus with the same SCSI ID .. & also by improper SCSI termination .

Can you post the #ioscan -fn ==> output that would be helpful

Re: Hardrive missing suddenly

Suraj Singh_1 — Thu, 16 Jun 2005 23:20:25 GMT

Hi,

The disk at /dev/dsk/c3t9d0 is probably loading the whole SCSI bus, due to which the SCSI bus stops responding.

You may want to call HP representative to have a look at this problem. Hopefully you have the backups handy!

~Suraj

Re: Hardrive missing suddenly

Henry Chua — Fri, 17 Jun 2005 01:09:44 GMT

Thanks for the advise guys, anyway here is the "ioscan -fn" log. The problem seems to be intermitten, all I have to do is to reboot the system and everything will be back to normal, but after awhile, the same hang will come back again...

Hope there is something I can do..

Re: Hardrive missing suddenly

Henry Chua — Mon, 11 Jul 2005 18:35:06 GMT

Hi Guys,

Base on the info provided, are there nothing i can do to rectify the problem?

regards

Re: Hardrive missing suddenly

Deepak.R — Mon, 11 Jul 2005 19:55:42 GMT

Hi,

Is it an external disk??? if yes, check and ensure proper aonnection and termination.

also, try running diskinfo -v /dev/rdsk/c#t#d# on the suspected disk.

you ca try dd ing te disk to /dev/null to detect disk issue.

thanks

Re: Hardrive missing suddenly

A. Clay Stephenson — Mon, 11 Jul 2005 20:38:49 GMT

This is rather typical of a failing disk. The very first thing you should do is make sure you have a good backup. It's also wish to check connections and you could even have missing or bad termination but much more likely is a disk that will soon fail completely.

Re: Hardrive missing suddenly

Henry Chua — Tue, 12 Jul 2005 00:49:22 GMT

thanks folks,

I have ran diskinfo, didn't show any problem, however when i did "dd" one of the disk give i/o error while the other 2 disks take forever to return a value i.e. nothing after hours.. is there anyway to know which of them is faulty.. or do I have to change all of them?

Best regards
Henry

Re: Hardrive missing suddenly

Fabio Ettore — Tue, 12 Jul 2005 02:01:07 GMT

Hi Henry,

I see you opened this thread since a month.
By now it is clear your system has hardware problems. I suggest you to open an HW call by HP and they will help you to know if one or more disks have to be replaced.

Anyway it sounds like a problem on SCSI bus or controller connection which produces errors on more disks randomly connected to it.

Open an HW call by HP and you should quickly solve these problems.

Best regards,
Fabio