Re: megaraid_sas waiting for command and then offline

[Dave Lloyd <dlloyd@exegy.com>]

Brett G. Durrett wrote:
>
> I have the same or a similar issue running 2.6.17 SMP x86_64 - the
> megaraid_sas driver hangs waiting for commands and then the filesystem
> unmounts, leaving the machine in an unusable state until there is a hard
> reboot (the machine is responsive but any access, shell or otherwise, is
> impossible without the filesystem).  While I do not have much debugging
> information available, this happens to me about once every 6-7 days in
> my pool of seven machines, so I can probably get debugging info.  Since
> the disk is offline and I can't get remote console, I don't have any
> details except something similar to Dave Lloyd's post, below.
>
> The only thing that the machines with these failures seem to have in
> common is the fact that they are almost exclusively writes - they are
> slave database machines with large memory and pretty much just
> replicate.  The read/write machines seem to have less failures.
>
> I am happy to help provide debugging information in any reasonable way.
> In the mean time, if there are any known suggestions or workarounds for
> the problem, I would be grateful for the guidance.
>
> Here are what details on the controller.  If you want additional info,
> let me know exactly what you need and I will do what I can to get it to
> you.:
>
> Product Name    : PERC 5/i Integrated
> Serial No       : 12345
> FW Package Build: 5.0.1-0030
> FW Version      : 1.00.01-0088
> BIOS Version    : MT23
> Ctrl-R Version  :1.02-007
>
> B-

Which motherboard are you using?  We believe that this may be a
motherboard specific issue.  It appears to happen on a SuperMicro
motherboard but not a Tyan motherboard.

--
Dave Lloyd
Test Engineer, Exegy, Inc.
314.450.5342
dlloyd@exegy.com
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