Re: [PATCH] sata_mv: Fix broken Marvell 7042 support.

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On Mon, 03 Dec 2007 18:33:10 -0500
Mark Lord <liml@xxxxxx> wrote:

> Alan Cox wrote:
> > On Mon, 03 Dec 2007 23:48:44 +0100
> > Hein-Pieter van Braam <hp@xxxxxxxxxxxx> wrote:
> > 
> >>> Man, what a quirky BIOS!
> >> Hum... I can pvcreate on the md device just fine, but after that, pvscan
> >> won't find it... 
> >>
> >> I have a suspicion that there's a BIOS doing some sector hiding or
> >> replacement of sorts... 
> >>
> >> *facepalm*
> > 
> > That would make sense. However we have weapons to make it surrender. See
> > the "dmraid" tool - you should be able to use that as an example of how
> > to set up device mapper mapped linear mappings to "unshift" partitions.
> ...
> 
> Ahh.. So dmraid is a way to work with using the HighPoint BIOS to define RAIDs.
> But not so advisable for maintaining adaptor-neutral pure Linux s/w RAID.

dmraid is a tool which knows large numbers of vendor "secret so the
customer can't swap vendor easily" type disk formats. It then translates
them into logical mappings using the dm layer, just as LVM2 does.

http://people.redhat.com/~heinzm/sw/dmraid/readme
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