Re: megaraid_sas waiting for command and then offline

["Brett G. Durrett" <brett@imvu.com>]

The machines are Dell 2900s, so the mobo is custom.  From a Dell SE, 
"Dell uses a custom mobo that is Dell branded with the Intel chipset 
Greencreek.".

B-




Dave Lloyd wrote:

> 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.
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