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