Re: [BLUG] Large RAID config suggestions? (This e-mail explains RAID for newbies)

On Tue, Jul 14, 2009 at 07:29:39PM +0000, Mark Krenz wrote:
> On Tue, Jul 14, 2009 at 04:51:04PM GMT, Steven Black said the following:
> > I mean, with a hotspare, the array is rebuilt on to the hotspare when a
> > drive fails. That's one major I/O operation.
>
> Just to make sure its clear. Technically, the array isn't rebuilt (as
> in the data that didn't fail stays put), it just writes the missing data
> onto the spare drive based on parity calculations of what is on the
> other drives.

You are correct. I used the wrong language. The correct term for the
reconstruction of the data on a single drive is just that. The drive
gets "reconstructed", not rebuilt.

Cheers,

--
Steven Black <blacks@indiana.edu> / KeyID: 8596FA8E
Fingerprint: 108C 089C EFA4 832C BF07 78C2 DE71 5433 8596 FA8E