[Bug 372170] Re: intel isw raid metadata at odd offset

[Robert Collins]

2113 in hex is 841, so the 0x4108  at bytes 0x206-0x207 (=518-519) could
be a dereference (-2113 sectors from here) except that it should be 842
as those bytes are in the -1 sector, not the -2.

If so, then this is definitely a new ISW metadata format; I'd have to
guess that the $GAFR is a new signature for it Note too that the first
sector is totally blank, it appears to only need the last sector now in
terms of bootstrapping.

I can whip up a generic probe based on this, but whats mostly likely to
be accepted into the package.

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intel isw raid metadata at odd offset
https://bugs.launchpad.net/bugs/372170
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