On 2003-06-30T14:34:51,
bmoon <bo@anthologysolutions.com> said:
> Hi Neil & Raiders,
>
> I am not quite sure if we really need to resync the array at the time of
> RAID 1 or RAID 5 array creation. I tried and tested without RESYNC by
> modifying "case1" and "case2" from MDADM source below, I could not notice
> any problems or issues.
It's necessary to ensure consistency of the RAID, so that later, you can
detect whether the RAID has scrambled some of your disk.
Otherwise, you'd never know whether it wouldn't still be an artifact
leftover from the creation of the array.
Another option would be a bitmap of used chunks so you could tell one
from the other, but that wouldn't make as much sense on a heavily used
array. So just initialize it once.
Sincerely,
Lars Marowsky-Brée <lmb@suse.de>
--
SuSE Labs - Research & Development, SuSE Linux AG
"If anything can go wrong, it will." "Chance favors the prepared (mind)."
-- Capt. Edward A. Murphy -- Louis Pasteur
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