[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Raid 1 action on failed disk?



On Wednesday 19 December 2007 07:50, S Scharf wrote:
> I am running a Debian 3.1 (Sarge) server with Raid 1 mirroring on the disk
> drive.
>
> Recently, one of the disks failed. The system sent root a proper e-mail
> notification of the failure. Unfortunately,
> the system seemed to continue to try to use the disk and operations slowed
> to the point that the only thing I could
> do was to power the system down and physically remove the bad drive. I had
> thought to check the mdadm status
> and remove the failed drive from the array by command.
>
> My question is shouldn't the Raid system have removed the drive for me
> after it had failed? Why was the system still
> trying to do operations on it after noticing the failure? Was (is) there
> something wrong with my raid configuration?

I'm assuming IDE drives, since this doesn't sound like a SCSI scenario.  IDE, 
is well, 'not Scottish'[1]  Even if your software RAID is no longer using the 
device it doesn't mean that the device won't try to communicate with your 
system and vice versa (at a hardware level).  If you've got another device on 
the same cable as the failed drive, if the failed drive may try to respond.  
Either way you get issues.

So no, likely there is nothing wrong your raid configuration.  I'd suggest 
scsi drives and, better yet, hardware scsi raid if you can afford them, but 
with standard ide components there's not much to be done.  hdparm _might_ 
allow you to detach the failed device from the ide bus, but I'm not really 
sure.

[1] There a saying, "If it's not Scottish, it's crrrrap!".  Of course as I am 
not, I don't believe it.

-- 
And that's my crabbing done for the day.  Got it out of the way early, 
now I have the rest of the afternoon to sniff fragrant tea-roses or 
strangle cute bunnies or something.   -- Michael Devore
GnuPG Key Fingerprint 86 F5 81 A5 D4 2E 1F 1C      http://gnupg.org
No more sea shells:  Daniel's Weblog    http://cshore.wordpress.com

Attachment: pgpEEBrfCWW9W.pgp
Description: PGP signature


Reply to: