Posted Jun 22, 2009 7:05 UTC (Mon) by neilbrown
In reply to: RAID rebuild
Parent article: What ever happened to chunkfs?
It shoulds to me like you need to discover write-intent bitmaps.
Such a bitmap is effectively a set of 'dirty' bits, one for each
chunk of the array (and you can choose the chunk size).
So if you set the chunk size to 50GB (I would probably set it a bit
smaller) you get the same functionality as you describe, only with
much less hassle.
So just create a raid1 or - if you have more than 2 drives - raid10,
mdadm --grow /dev/md0 --bitmap=internal --bitmap-chunk=1000000
and you will be much happier.
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