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To: Andre Hedrick <andre@linux-ide.org>
Cc: Andries.Brouwer@cwi.nl, mlord@pobox.com, ole@linpro.no,
        linux-kernel@vger.kernel.org
Subject: Re: Problems with Promise IDE controller under 2.4.1
In-Reply-To: <Pine.LNX.4.10.10101311201390.13711-100000@master.linux-ide.org>
From: Rupa Schomaker <rupa-list+linux-kernel@rupa.com>
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Date: 31 Jan 2001 22:05:08 -0800
In-Reply-To: <Pine.LNX.4.10.10101311201390.13711-100000@master.linux-ide.org> (Andre Hedrick's message of "Wed, 31 Jan 2001 12:03:04 -0800 (PST)")
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Andre Hedrick <andre@linux-ide.org> writes:

> On 31 Jan 2001, Rupa Schomaker wrote:
> 
> > Andre Hedrick <andre@linux-ide.org> writes:
> > 
> > 
> > > > But there is no indication of what the problems could be,
> > > > or what he thinks the geometry should be (and why).
> > > > I see nothing very wrong in the posted data.
> > > 
> > > We agree Andries, but the enduser wants to see stuff the same.
> > 
> > In my case, I have two identical Maxtor drives, but they reported
> > different geometry.  How could that be?  Move the "virgin" drive to
> > the motherboard IDE controller and suddenly the geometry is the same.
> > Use fdisk and partition the disk, write it, and then move to the
> > promise controller and the "correct" geometry was used (that is, it is
> > now the same as when hooked up to the motherboard ide controller).
> > 
> > Why was it important to me?  I'm doing RAID1 and it is really nice to
> > have the same geometry so that the partition info is the same between
> > the two drives.   Makes life easier.
> 
> Please read the above and pass the geometry to the kernel.
> Mother boards have to do a translation to use the drive completely.

Andre,

But now it doesn't matter.  The drive was tainted (fdisk run while
attached to the mainboard controller) and now that geometry is
"stuck".  <shrug>  I was mostly explaining why it is nice to get the
same geometry on two identical drives (RAID1 is easier for the human
to deal with).

-- 
-rupa
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