In message , Michael
Salem writes
nospam wrote:
"Sideshow" wrote:

A raid0 or raid5 array is the most suitable option for long term backup, as
if one drive fizzucks you can just replace it with a new one without any
data loss.

Sure, a small company I know decided a raid array on their server meant
they didn't need to backup. The sever fell over one day and trashed the
whole array, they lost everything. Hard drives inside an active machine are
a very bad idea for long term backup.

Also, FILES get corrupted or otherwise damaged without affecting the
hard disc. It's very nice to have a week's daily backups and a month's
weekly backups on tape (9 tapes).

Pretty much essential. In my experience the main use for backup tapes is
to restore files that users have deleted. A RAID array doesn't protect
against that. In fact I haven't ever needed to use a backup tape for any
other purpose, and I've been working with computers for 25 years.



--
Bernard Peek
London, UK. DBA, Manager, Trainer & Author. Will work for money.