Switchover to CAM ATA?

Alexander Motin mav at FreeBSD.org
Tue Apr 27 14:00:16 UTC 2010

Dag-Erling Smørgrav wrote:
> Maxim Sobolev <sobomax at FreeBSD.org> writes:
>> Richard Tector <richardtector at thekeelecentre.com> writes:
>>> Could I also add that the removal of ataraid would affect those
>>> users who dual-boot with Windows and rely on the psuedo-raid
>>> provided by most Intel chipsets to be able to share the same pair of
>>> disks.
>> Well, this won't be a problem if we have GEOM classes that can
>> understand metadata created by the ATA RAID BIOS(es).
> Most pseudo-raid kit has nifty features like checksum offloading,
> composite writes etc. which can improve performance considerably.  You
> can't access those from GEOM.

Have you ever seen them documented? Does the need to specifically handle
dozens of incompatible implementations with limited resources worth
those (probably not major) benefits?

Alexander Motin

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