Sorry to sound like a broken record - but I've been preaching disk redundancy for the past 2 years on the Hog.
I guess what I've done is a bit unique - since I did build it - but:
-
System Drive = 2 x 500GB HDD in RAID-1 (Mirror - 500 GB available)
Data Drive = 3 x 2TB HDD in RAID-5 (4TB available)
Network Attached Storage (NAS) = 4 x 3TB in RAID-5 (9TB available)
. . . . I back up my computer data drive to the NAS on a regular basis.
-
In each drive cluster - any SINGLE drive may fail with NO data loss.
The failed drive may be replaced with a NEW drive - and the array will rebuild itself (MAY take 2 days for the 9TB array).
The ONLY time I will lose stuff is if 2 drives simultaneously fail, OR a SECOND drive fails during the re-build.
-
Best idea: Fault Tolerant hard drive arrays - that you ALSO back up (and store at a separate location)!!
-
Carbonite - on line backup: OK if you have a SMALL amount of data - when you get upwards of 100GB - it slows waaaayyyyy down.
-
Optical media are slow, difficult to index, and take up a huge amount of space - compared to even a 1TB HDD ! To archive 3TB onto current optical media would take nearly a lifetime {figuratively - or maybe it would just seem that way} and require a dedicated librarian and storage room to house them.
-
I CAN see a use - possibly for the M-Disk:
http://millenniata.com/perhaps for the pro photog who shoots events: once the images had been processed, and the clients package produced in final - then producing an M-Disk burn of the entire related folder (RAW, pre processed, post process, etc) files could permit deletion from the working HDD without much fear (other than natural disaster) that if needed, those images would be available for reprinting or edits.
M-Drive does require $pecial di$k$ and a $pecial di$k burner. Then can be read on any optical drive.