Date: Tue, 20 Jan 2004 13:18:00 -0800 From: Julian Elischer <julian@vicor.com> To: SCSI@freebsd.org Subject: CAM//SCSI disk timeouts Message-ID: <400D9B08.70005@vicor.com>
next in thread | raw e-mail | index | archive | help
If we are talkign to a raid array and it discovers that it has to do some maintanance (e.g. declare a physical disk bad or recreate some data on the fly) it is possible that transactions to the raid that are outstanding may tak a lot longer than usual. In particular, we've seen the case where a log entry in teh Raid controller's log that indicates that a drive has been declared bad, is often accompanied in FreeBSD with a set of CAM /scsi-disk timeouts and things degrade from there... Where can I find the timeouts in force fo rscsi disks and teh retry policies? I need to compare the theoretical behaviour of FreeBSD CAM with the theoretical timeouts needed for the raid array, given a disk failure..
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?400D9B08.70005>