Re: [patch] ext2/3: document conditions when reliable operation is possible

From: Chris Adams
Date: Tue Aug 25 2009 - 10:07:08 EST

Once upon a time, Theodore Tso <tytso@xxxxxxx> said:
>I'll note, BTW, that AIX uses a journal to protect against these sorts
>of problems with software raid; this also means that with AIX, you
>also don't have to rebuild a RAID 1 device after an unclean shutdown,
>like you have do with Linux MD. This was on the EVMS's team
>development list to implement for Linux, but it got canned after LVM
>won out, lo those many years ago.

See mdadm(8) and look for "--bitmap". It has a few issues (can't
reshape an array with a bitmap for example; you have to remove the
bitmap, reshape, and re-add the bitmap), but it is available.
Chris Adams <cmadams@xxxxxxxxxx>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.
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