[CentOS] 3ware disk failure -> hang

Fri Jan 6 21:41:10 UTC 2006
Bryan J. Smith <thebs413 at earthlink.net>

Les Mikesell <lesmikesell at gmail.com> wrote:
> No, I've had several SCSI drive failures in software
> raid and the kernel will gracefully log the errors,
> mark the drive failed in the md array and go on about
> its business.  This doesn't happen with typical
> IDE devices, but the 3ware isn't a typical IDE
> controller.

Then the 3Ware card must not be doing something that a
typical SCSI card does, and more typical of a "dumb" block
ATA driver, even though it's using the SCSI subsystem.

> If you do everything in the right order, you can replace
> a failed hot-swap scsi drive and rebuild the software
> raid without shutting the machine down.

Again, SCSI cards must have some added notification, or at
least the ones you are using.  I guess that would make sense,
because there _is_ the "host adapter" on-board.

In any case, 3Ware cards do _not_ do it for JBOD.

-- 
Bryan J. Smith     Professional, Technical Annoyance                      b.j.smith at ieee.org      http://thebs413.blogspot.com
----------------------------------------------------
*** Speed doesn't kill, difference in speed does ***