[5583] in linux-scsi channel archive
Software RAID & hotplug doesn't work on Compaq (Re: Swapping on raid)
daemon@ATHENA.MIT.EDU (Ola Sigurdson)
Wed Jan 13 21:48:17 1999
Date: Thu, 14 Jan 1999 03:43:04 +0100
From: Ola Sigurdson <Ola@Sigurdson.SE>
To: Louis Mandelstam <louism@man8.com>
CC: linux-raid@vger.rutgers.edu, linux-scsi@vger.rutgers.edu
This is a multi-part message in MIME format.
--------------D567F2E47F2299DA2C1BE5DF
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Don't rely on software RAID on the Compaqs!!!!
Unplugging active disks causes a 100 % repeatable kernel crash (total
lockup).
As far as I can tell it's caused by bugs in the NCR driver
This is with kernel 2.0.36 & Compaq Proliant 1600.
--
Email: Ola@Sigurdson.SE Office tel: +46 46 37 01 24
Cellular tel: +46 707 30 37 36 Fax: +46 46 13 12 72
Louis Mandelstam wrote:
>
> On Wed, 13 Jan 1999, Russell Brown wrote:
>
> > >Reasons TO USE RAID for swap - if the darn swap partition goes bad,
> > >the kernel chokes. With a raid swap partition, a bad disk will not
> > >bring down the system. Guess how I found out!!!
> >
> > Except that the lower level SCSI drivers* seem to croak when a disk goes
> > bad and lockup the system anyway :-(
> >
> > * - aic7xxx in my case.
>
> It seems some Linux SCSI drivers handle this, and some don't.
>
> I've a Proliant 6500R using the SCSI hot-swap tray and onboard NCR53C875,
> and hot-removing/adding seems to work just nicely.
>
> I didn't have opportunity to test by actually pulling drives out of the
> SCSI tray yet however, but echoing to appropriate command to
> /proc/scsi/.. had the desired effect of shutting down a disk, causing md
> to rebuild onto a hot spare. Removing the shut down drive at this point
> works fine, and I can re-add it later, spin it up using echo ... >
> /proc/scsi/... and make it part of the RAID again.
>
> -------------------------------------------------------------------------
> Louis Mandelstam # man 8 consulting -o)
> email: louism@man8.com System administration contracting /\\
> Mobile: +27-83-289-0310 'whois LM497' for current contact info _\_v
> ---------------------[ Penguin Cloning Specialist ]----------------------
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@vger.rutgers.edu
--------------D567F2E47F2299DA2C1BE5DF
Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf"
Content-Transfer-Encoding: 7bit
Content-Description: Card for Ola Sigurdson
Content-Disposition: attachment; filename="vcard.vcf"
begin: vcard
fn: Ola Sigurdson
n: Sigurdson;Ola
adr: Warholmsväg 8A:3;;;Lund;;S-224 65;Sweden
email;internet: Ola@Sigurdson.SE
tel;work: +46 46 37 01 24
tel;fax: +46 46 13 12 72
x-mozilla-cpt: ;0
x-mozilla-html: FALSE
version: 2.1
end: vcard
--------------D567F2E47F2299DA2C1BE5DF--
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
