Date: Tue, 18 Jun 2002 16:51:51 -0500 From: Bob Willcox <bob@immure.com> To: John Nielsen <stable@jnielsen.net> Cc: stable list <freebsd-stable@freebsd.org> Subject: Re: the new ATA driver vs. vinum Message-ID: <20020618215151.GB9829@luke.immure.com> In-Reply-To: <0fb301c2170c$df665ff0$0900a8c0@max> References: <DBEFLLCPEGLPEAGOPLIHIEEODKAA.patrick-fbsdstable@mindstep.com> <0fb301c2170c$df665ff0$0900a8c0@max>
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On Tue, Jun 18, 2002 at 03:12:36PM -0600, John Nielsen wrote:
>
> Bear in mind that atacontrol is a utility to interact with a hardware ATA
> raid controller, and doesn't do RAID itself. Vinum allows you to do RAID
> without any special hardware. ATA RAID was possible in 4.5, you just had to
> rely on the RAID controller's BIOS to set it up and manage it if there was a
> problem.
Actually, with the new ata driver and atacontrol you can do raid w/o an
ata raid controller with some restrictions. From the atacontrol man page:
Allthough the ATA driver allows for creating an ATA RAID on
disks on any controller, there are restrictions. It is only pos-
sible to boot on an array if its either located on a "real" ATA
RAID controller like the Promise or Highpoint controllers, or if
the RAID declared is of RAID1 or SPAN type, in case of a SPAN
the partition to boot must reside on the first disk in the SPAN.
So as long as you don't want/need to boot from the RAID, any IDE
controller should work.
I have several systems here runing both a RAID0 and a RAID0+1 array
using a standard non-RAID promise IDE controllers (TX2's as I recall).
Works fine! :-)
Bob
--
Bob Willcox Dealing with failure is easy: work hard to improve.
bob@vieo.com Success is also easy to handle: you've solved the
Austin, TX wrong problem. Work hard to improve.
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