Bug in aac?

[Cstdenis]

Yes the system does recover. I have not been actively using the system 
when this happens so I'm not sure how long, but it looks like a few to 
several minutes.

Its a dedicated server at a hosting company -- I don't have physical 
access to the hardware so I don't know the exact details. The info I 
gave was a combination of dmesg and what I ordered.

Here is what the web control panel says I have

    Motherboard    SuperMicro PDSMI+ Intel Pentium DualCore SingleProc 
Sata [1Proc]
       
    Processor    Intel Xeon 3060-Dual Core [2.4GHz]
       
    Drive Controller    Adaptec 4800SAS SA-SCSI RAID-1 Controller 
Available upgrades
       
    Hard Drive 1    Fujitsu MAX3073 SAS 3073 [73GB] Available upgrades
    Hard Drive 2    Fujitsu MAX3073 SAS 3073 [73GB] Available upgrades


I will try requesting a firmware upgrade. If that doesn't work is there 
more information I can provide to help get the bug fixed? I tried 
compiling AAC_DEBUG=3 into the kernel but it made the system unusable 
with the constant flow of debug data. I worry that AAC_DEBUG=1 will also 
be too much for the system to be usable, but I'm not sure.


Scott Long wrote:
> Cstdenis wrote:
>   
>> I am running 6.1-p11 with a Adaptec SAS RAID 4800SAS running a mirror of
>> 2 15k rpm SCSI drives.
>>
>> Under heavy IO load (Its a database server) I get the following
>> accompanied by serious system lag:
>>
>>     
>
> The system recovers after this?  Strange.  What the messages mean is
> that I/O has been sent to the controller, and the controller has not
> responded in a reasonable period of time.  Usually this is a sign of
> the controller has died and will not recover.  So if it is recovering
> then either there is a firmware bug that is making the controller pause
> for a long period of time, or there is some sort of yet-undiscovered
> driver bug.  Of course you should make sure that you're running the
> latest firmware from Adaptec.  These cards are new and SAS in general
> is relatively new, so bugs are not unlikely.  One question, though, how
> are you running SCSI drives on a SAS controller?  Are you going through
> some sort of converter?
>
> Scott
>