K Class Loses Same Drive After System Is Brought To A Halt.

[Rob Smith]

Hi,

I have a K360 box that has a very strange problem. Everytime, and I mean everytime, this system is brought to a halt and turned off, it loses a drive when the box is turned on again. And it is the same drive! This has happened around 5 times in the last year and a half.

Just looking on some guidance on where to start. Patches are not completely up to date but not a disaster either. This drive is internal to the K, one of 2, and not in an external array. Any thoughts or ideas are appreciated.

Thanks,
Rob

[paul courry]

I could start guessing at what "loses" means

does not spin up
is fried and must be replaced
is not recognized
etc.
etc.

but I can give you a better answer if you are specific and give me as much information as you can. Sorry. :(

[Vincenzo Restuccia]

Diagnostics what say? STM,EMS,ioscan -nf

[Denver Osborn]

After the system is brought back is the drive lost as in not seen with ioscan or couldn't activate vg lost? ie/ could'nt query pv then you have to vgcfgrestore to get it back.

[Rob Smith]

Sorry guys more details are in order. I can see the drive with an ioscan but the usual checks, diskinfo, dd etc, show the drive to be dead. It is part of a mirror set so I usually break quorom and bring the VG up with the surviving drive. Thanks, I will assign points.

Rob

[Denver Osborn]

If ioscan sees it but diskinfo shows it as zero bytes and dd gets read errors, I'd replace the disk.

[A. Clay Stephenson]

This one is strange. Have any of the other devices on the internal bus failed? The only things that occur to me are possibly bad termination (I once saw a terminator where one of the data lines was terminated with too small of an impedance due to component failure) and it caused really wierd problems);
and possibly a bad SCSI connector. I thing I would move the drive connection and make sure that there are no terminators installed on the drive itself.

[Michael Francisco]

We had a similar problem on a D class server. I'm not sure about the K360, but on a D350, the SE SCSI port on the back is on the same channel as the internal drives, so having a bad cable, terminator or SCSI device on the external bus may affect the internal drives.

Michael