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From: "Sergey S. Kostyliov" <rathamahata@ehouse.ru>
Reply-To: "Sergey S. Kostyliov" <rathamahata@ehouse.ru>
To: comsatcat@earthlink.net
Subject: Re: Megaraid random loss of luns
Date: Fri, 8 Oct 2004 11:47:38 +0400
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On Friday 01 October 2004 03:15, comsatcat wrote:
> I'm not sure if this is the correct list or not to ask about this, but
> it seemed proper.  We have a machine running the megaraid module that
> came with vanilla 2.6.7.  Earlier this morning all the luns suddenly
> disappeared for no apparent reason.
> 
> The kernel logged the following messages:
<cut>
> Could someone provide an explanation of what exactly went wrong if
> possible (if the megaraid driver was at fault or the raid controller)? 
> Are there any known bugs with large raid 5 volumes using the megaraid
> driver?  The volumes are each 325G (4 total) in this situation.  We've
> experienced other problems with the megaraid driver such as 1TB luns
> (two per controller) loosing almost all disks in them (I thought this
> was a controller problem at first, but we have 2 different models of
> controllers, 1 LSI PCI 320-4x and 2 LSI PCI 320-2x's, on 3 identical
> hardware configurations and have been experiencing problems on all of
> them).
I've got exactly the same issues for four of my machines under heavy IO load
(all are raid1) with megaraid 320-{1,2} and megaraid 160 (Series 475).
kernel 2.6.8.1. For me it looks like a driver issue rather than  a particular
controller problem ...

-- 
Sergey S. Kostyliov <rathamahata@ehouse.ru>
Jabber ID: rathamahata@jabber.org
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