scsi parity error in windows 2008 with Quantum px500 library

Posted on 2009-05-27
Medium Priority
Last Modified: 2013-11-14
I have connected a Quantum px500 library to my windows 2008 IA64 client. When I am taking a backup of less then 1 gb data everything is fine. When I am taking backup of 8 gb data the backup fails. I am using HP Data Protector backup software. When I am seeing the logs for it, the acs and acsq values are 40h and 00h which means scsi parity error. If I install Linux on the same machine and take backup of bigger files everything is fine.

Can you please tell what could be the error?
Question by:sukantapalo
LVL 22

Assisted Solution

dovidmichel earned 200 total points
ID: 24493556
The one thing that comes to mind is the 64k buffer size limitation with Windows for controller drivers.

Still a parity error is kind of unique. Unlike the common NT SCSI Port Errors that come up and can be caused by just about anything, parity errors are specific.

Are you sure the Linux install is doing parity checking? If not the error could still be happening and just going unreported. Was the backup done with a compare tape to disk to verify the integrity of the data?

In spite of the fact that the backups work under Linux I still recommend doing the standard checking.
verify the bus is properly terminated
replace the terminator
replace the cable


Accepted Solution

sukantapalo earned 0 total points
ID: 25077349
Thanks for the answer. The windows driver and the hardware combination may be not working. I changed the system it works fine. So it seems to me as an hardware error only.

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