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Date: Thu, 08 Feb 2001 11:00:15 +0900
From: "A.Sajjad Zaidi" <sajjad@vgkk.com>
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To: Mark Hahn <hahn@coffee.psychology.mcmaster.ca>
CC: linux-kernel@vger.kernel.org
Subject: Re: Promise, DMA and RAID5 problems running 2.4.1
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Mark Hahn wrote:

> > drives (all IBM-DTLA307045 s) that I realised that the cylinder/head
> > translation is different and I cant use the whole drive unless its
> > partitioned while attached to the other IDE ports.
>
> no, it's just that the bios doesn't perform the LBA geometry lie
> outside the hd[abcd].

Hmm, thats weird, because hd[abcd] were the ones without the LBA geometry.
Maybe it was because ide was reversed (ide=reverse lilo parameter).

> boot with hde="6666,255,63" (or whatever).

Thanks, I was searching for something like that.

> > Second, I set up raid mirroring for 4 drives(2 raid, 2spare).  Since one
> > drive isnt available yet, one of the 2 raid partitions are set as
> > 'failed-disk'. All drives are connected to the ATA-100 controller. This
>
> do you understand that you can't really have raid on ide involving
> two drives on the same channel?

Is that just because of performance or are there other problems? Its working
fine as it is, but Im considering setting up all drives as masters (2x
ATA-100, 2x ATA-66).

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