> After you've put together this beast, keeping it up will be a big job
> (budget an hour or 2 a day). It will fail, with so many drives in such
> a small space, it will probably fail often.

This becomes a non-trivial task as some of my friends at work will attest -=
 they are looking after large arrays of disk with so many disks that they r=
eckon on a disk failure every week, almost "without fail" as the saying goe=
s. With the number of disks in these arrays the manufacturers MTBF figure a=
bout matches the number of failures they see.

These arrays are petabyte arrays for data streams coming from satellites an=
d tier 1 data storage from the Large Hadron Collider. But the size of your =
array, even if built with 1TB or larger drives will still have a notable im=
pact on the MTBF rate, so you do need to budget in a couple of spare drives=
, possibly set up as hot spares.


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