On Sun, 2002-06-09 at 20:33, Alvin Oga wrote: > if you have a nearly full 80GB disks ... it wont matter > if you have 1x 80GB or 4x 20GB( stripping )
No, it does matter. You can expect at least one of four 20GB drives to
fail much sooner than one 80GB drive, assuming same MTBF numbers on all
drives.
The MTBF for one 50,000hr MTBF disk is 50,000hr. For four of them, it is
13,500Hr.
[ And, if you operate the four for a year, you can expect 1 to fail. ]
> best best...
> ===
> === backup data regularly to DIFFERENT systems ..
> ===
Or tape. But whatever you do, make sure you:
1) Test your ability to restore data. Do this regularly. You'd hate
it if you couldn't.
2) Verify your backups. Very important for tape.
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