Re: RAID controllers?

[root <lists@gecko.math.ualberta.ca>]

On Wed, 14 Mar 2001, Russell P. Sutherland wrote:

> * Louis Bertrand (louis@bertrandtech.on.ca) [14 Mar 2001 22:46]:
>
> > Help, I'm looking for recommendations for hardware RAID controllers that
> > are known to work under OpenBSD (RAID-1/mirroring). I just tried a Compaq
>
> I've had success with the 3ware Escade products. Specifically
> the 6200 card (two channels, RAID 0&1) and the 6400 (RAID0,1&5).
>
> These work only with IDE disk drives.

agreed. the magic happens on the card, and openbsd just sees a TWE scsi
controller and as many scsi disks as you configured arrays. the 3w-6400
supports raid 0, 1, 5 and "10" (0+1)

the 3w-6400 is working beautifully - my new snort box has a 4 port and 4
80 disks, and it's even bootable off the array!

after some goofing around i've got some working 8-port cards. the 4 and 8
port cards both work reasonably well - same board, just missing a few
sockets. i haven't had a chance to do any real testing, but it seems
faster than using the CCD driver to stripe disks...

the  8-port has issues regarding timeouts while the kernel detects the
arrays.  there was a fix committed for this on tuesday... watch out for
stray interrupt 7's: if you get one, you may as well reboot since your
disk will fail to detect. i know of no solution for this (nothing useful
in the list archives.)

CK

-- 
Chris Kuethe:  System Administrator  -   U of A Math Dept.

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