Douglas Allan Tutty wrote:
To protect users from their own errors, you could just backup to
/var/local/backup on your existing raid5 array.
To protect the raid5 array, add a spare drive on a different controller
if possible to provide some failover. Add two for raid1.
If you have a spare computer, backup to that. This could be your
workstation. Add a drive or two (for raid1 there). Have it on a
separate power supply/UPS/whatever.
You mean separate power supply for additional drive(s)? Is it to
switch it off after backup is finished?
Then, external USB makes sense. Get three: one hot, one on-site cold,
one off-site cold for disaster. Have you found an external USB drive
that takes 270 GB or will you have multiple drives and use your backup
software for volume management?
I found an external USB drive with 320GB. I was thinking to buy one
for beginning. But now I might buy more.