Re: I'm about ready to do SW-Raid5 - pointers needed

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On Tue, 28 Oct 2003, maarten van den Berg wrote:

> On Tuesday 28 October 2003 09:26, Gordon Henderson wrote:
> > On Mon, 27 Oct 2003, berk walker wrote:
>
> > Good luck with your promise board (what type is it?) I've had a lot of
> > problems with them (kernels 2.4.20-22) They seem to work, but under heavy
> > load, I see processes getting stuck in "D" state (eg. nfsd or anything
> > doing lots of disk IO) Most of the time they recover, but I've load a disk
> > partition on more than one occasion (saved by raid, and it re-built OK
> > after a reboot). I've seen this in 2 different servers and tried both
> > Intel and AMD CPUs. Tonight I try a set of different PCI IDE controllers
> > in one server to see if that helps it.
>
> Promise cards do suck somewhat -albeit I use them- but what else is there ?
> The highpoint-equipped cards are even more sucky in many cases.

Hm. I'm just about to try a pair of HighPoint cards tonight...

> > It's hard to tell if it's a real hardware problem or a software one (the
> > Promise driver being fairly new, patched in at 2.4.20, included in 2.4.22)
>
> Ehm, what ???  You're probably talking about the driver for the fasttrack
> cards who are -in their own respect- raid cards. But if you use a 'plain'
> card like the ultra it's just used as an additional IDE channel. That has
> worked long long before 2.4.20 and it is what I use.  No sense in buying a
> pricey fasttrack if you're not going to use the raid but use the md tools
> instead.

The cards I have identify in /proc/pci as:

  Unknown mass storage controller: Promise Technology, Inc. 20269 (#2) (rev 2)

They aren't RAID cards (as far as I'm aware!) and I needed to apply the AC
patches to 2.4.20 to get them to be recognised. (These patches are
integrated into 2.4.22)

Gordon
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