7.1, mpt and slow writes

[Peter C. Lai]

On 2009-01-29 11:43:46AM +0000, Richard Tector wrote:
> Charles Sprickman wrote:
>> Hello,
>> 
>> I think this needs a few more eyes:
>> 
>> http://lists.freebsd.org/pipermail/freebsd-scsi/2009-January/003782.html
>> 
>> In short, writes are slow, likely do to the write-cache being enabled on 
>> the controller.  The sysctl used in 6.x to turn the cache off don't seem 
>> to be in 7.x.
>
 
I am guessing this is only related to SATA drives on SAS controllers?
The only mpt hardware I have is LSILogic 1030 Ultra4 and it writes
sustained 40MB/s to my LTO-2 drives out of the box without any tweaking.

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Peter C. Lai                 | Bard College at Simon's Rock
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