[smartmontools-support] Bad block HOWTO: Thanks!

[Frédéric B. <fb...@fb...>]

I'd like to thank everybody who had a hand in writing the Bad block
HOWTO, especially the LVM section.

A week ago, one of the two drives in my RAID-1 array started returning
random crap for some sectors (I thought they were supposed NOT to do
that), which obviously made the whole array unreliable.  Thanks to the
HOWTO, I was able to use a "cmp -l" of the two devices to work out which
(few, unimportant) files were affected, before yanking out the faulty
drive.  This saved me a lot of grief.

If I may make one small suggestion: the HOWTO does not talk about
md/RAID, so I figured I would have to take into account the size of the
md header myself.  I eventually discovered that, by default, md stores
its superblock near the *end* of the block device; therefore, it does
not interfere with any of the sector number calculations.  (Well, unless
the bad sector is *in* the md superblock.  That's gotta hurt.)  Anyway,
I just thought there could be a short mention of this.

Again, thanks to you all!


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