[PATCH] second attempt at DDF1 support for dmraid

[Darrick J. Wong]

Hi all,

Here's a second run of the DDF1 patch:
http://sweaglesw.net/~djwong/docs/ddf5.patch

This patch applies against dmraid 1.0.0rc11-pre1 and includes the fixes
described below.  Note that this patch supersedes last week's.

- The adapter data table offset should be multiplied by the block
  size, else we get zero (or garbage) and we certainly don't get
  what we want.
- A new flag, adaptec_mode, to identify when we should be looking
  out for Adaptec controller quirks.
- (Sketchy) workarounds for strange quirks in Adaptec controllers.
- Working RAID5 support because dmraid 1.0.0rc11-pre1 lets us specify
  the parity algorithm and loads the correct RAID5 device size in
  the dm table.
- Linear concatenation arrays also work.
- #if 0 code removal.

Let me know what you think.  Heinz, are you out there?

--D

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