[CentOS] Centos and Software RAID

Sat May 27 03:17:22 UTC 2006
Les Mikesell <lesmikesell at gmail.com>

On Fri, 2006-05-26 at 20:37, Raymond Lillard wrote:
> > 
> > Note that unless it has changed recently, SATA drives don't pass
> > errors up to the software raid layer correctly.  If a drive
> > dies it doesn't get kicked out as it should.
> 
> 
> Would you please elaborate as this seems to run
> counter to my experience?
> 
> I have had 3 drive fail events with software raid (md)
> tools and SATA drives in the last year.  The drive was
> taken off-line and I as the sysadm received a warning
> message via email.
> 
> I downed the systems (after-hours) and replaced
> the failed drive. (These machines don't have hot-
> swappable h/w)  No problems were encountered.

I'm just repeating what I've seen elsewhere - which is that
if you have hot-swaps you can yank a drive and it doesn't
show as failed in the raid.  I don't have any SATA's
myself - mine are all SCSI and they have failed correctly.
Perhaps it depends on the failure mode.

-- 
  Les Mikesell
   lesmikesell at gmail.com