Dell SAS5 Performance Issue

[Scott Long]

dmose wrote:
> 
> 
> Scott Long-2 wrote:
>> dmose wrote:
>>>
>>> Bjoern A. Zeeb wrote:
>>>> On Tue, 27 Mar 2007, Ivan Voras wrote:
>>>>
>>>>> Richard Tector wrote:
>>>>>> Is there any information I could obtain that would be of use to you in
>>>>>> tracking this one down?
>>>>> You could maybe contact the driver's author(s) directly and ask them.
>>>>> See the AUTHORS section of the man page for details.
>>>> you should have done your homework before saying this and you might
>>>> have noticed something;-)
>>>>
>>>> To just add a "me too"; same kind of machine.
>>>>
>>>> I have been in contact with people the last three days mostly
>>>> gathering information for them. And yes, the integrated curses based
>>>> controller utility you can start during boot does not seem to have
>>>> options to adjust "caching behavior". At least I had not seen and
>>>> option for that either.
>>>>
>>>> Unfortunately this machine will be shipped of the day after tomorrow
>>>> so I won't be able to test anything new. I'll follow this thread and
>>>> in case I can help with anything - let me know.
>>>>
>>>> /bz
>>>>
>>>> -- 
>>>> Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT
>>>> _______________________________________________
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>>>>
>>>>
>>> Hey guys any updates on this?  I'm experiencing the same issue win2kx64
>>> environment slow I/O write (read about 65MB/sec) in RAID 1.
>>>
>>> There is no way to enable caching in the boot BIOS ... anyone hear plans
>>> for
>>> them to update a version that will allow us to configure these options?
>>>
>>>
>> Are you asking about FreeBSD or Windows 2000?
>>
>> Scott
>>
>> _______________________________________________
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>>
>>
> 
> Either or (actually Windows2003server x64)
> 
> I figured the write cache is not an OS specific setting, but rather
> controlled via the host adapters internal BIOS.
> 
> So I can't see any way to enable this via the bios..
> 

It's not controllable through the BIOS.  There are Windows apps that
will allow you to control it, but you should contact Dell and LSI about
those, not FreeBSD.  FreeBSD now has an option for handling it as well.

Scott