Re: RAIDframe corruption

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Mon, 29 Feb 2016 08:38:31 +0000
    From:        Emmanuel Dreyfus <manu%netbsd.org@localhost>
    Message-ID:  <20160229083831.GF7353%homeworld.NetBSD.org@localhost>

  | I have trouble to find an explanation of how both events occurend.

One way that raidframe might be involved, is that it writes whole
stripes at a time, so it can easily be writing blocks that you never
expected it to write to.   Depending upon your stripe sizes, for example,
it might write to the boot block while updating the filesystem superblock.

If you had bad ram (or dma, or something) one or both of the writes
might go wrong, considering that raid1 has to update both copies on a write.

kre