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[school-discuss] Re: use on Dell

on Fri, Mar 25, 2005 at 02:47:24AM +0200, Michael Shigorin (mike@xxxxxxxxxxx) wrote:
> On Thu, Mar 24, 2005 at 04:55:44PM -0700, cdmiller wrote:
> > Current Poweredge 2650's use an adaptec RAID card for which the
> > Linux 2.6 drivers are unstable and slow.
> Hm, all the specs a quick search turned up seem to tell it has
> "Adaptec 7899" which is perfectly a hardware controller albeit not
> RAID-capable on itself IIRC.  Maybe Dell stacked something on top of
> that or did a different controller (most likely "HostRAID" junk or
> 79xx series), if that's the case then just turn off HostRAID option in
> its BIOS.
> Building software RAID on top of those worked just fine for me even
> with 2.4.2x kernels (three years ago 7899, last fall 79xx).  (I still
> look forward to build the first production server using 2.6.x series
> but that will be done this year if things go right)

A friend suggests that Dell's "PERC" RAID controllers may be an issue.
In part on account that 'PERC' (not sure what it stands for -- 'CERC'
was "cheap electronic raid controller") covers a multitude of sins.

I've suggested Dean provide additional HW data on the kit in question,
and suggested several tools for doing same.  Barring that, we're largely
left to speculation.


Karsten M. Self <kmself@xxxxxxxxxxxxx>        http://kmself.home.netcom.com/
 What Part of "Gestalt" don't you understand?
    Let sleeping dogs lie.

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