John Rowe wrote:
I'm about to create a RAID1 file system and a strange thought occurs to
me: if I create a two-disk RAID5 array then I can grow it later by the
simple expedient of adding a third disk and hence doubling its size.
Is there any real down-side to this, such as performance? Alternatively
is it likely that mdadm will soon be able to convert a RAID1 pair to
RAID5 any time soon? (Just how different are they anyway? Isn't the
RAID4/5 checksum just an OR?)
I think it works, I just set up a little test case with two 20MB files
and loopback mount. The mdadm seems to work, the mke2fs seems to work,
the f/s is there. Please verify, this system is a bit (okay a bunch) hacked.
--
bill davidsen <davidsen@xxxxxxx>
CTO TMR Associates, Inc
Doing interesting things with small computers since 1979
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