ZFS ATA vs. ZFS CAM ATA performance on 8.1

[Zane C.B.]

On Tue, 27 Jul 2010 09:41:51 +0000
Alexander Best <arundel at freebsd.org> wrote:

> hi there,
> 
> i just stumpled upon this article over at phoronix which benchmarks
> ZFS ATA vs. ZFS CAM ATA on freebsd 8.1 [1]. it seems read
> performance is really low when CAM ATA is enabled. i remember
> phoronix being famous for posting stupid benchmarks (RELASE vs.
> HEAD and such). however their benchmark results in this example
> seem to be valid.
> 
> any comments on that? has performance of ATA CAM increased in HEAD?
> would a UFS2+S+SUJ ATA vs. UFS2+S+SUJ CAM ATA also show equal
> results?

Not sure about any speed increases with ATA_CAM, but I for one
controller I have in this system I did get a massive boost and a end
to annoying disk issues with AHCI.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-chat/attachments/20100803/55cd19ea/signature.pgp