backup for RAID 0

[runLoganrun]

Can I use a single drive to mirror the raid 0 array, or do I have to get 2 to match the raid array (raid 0+1?)? Next question- If I have to get 2 drives to match the raid 0, do they have to be the same drive, or just matching sizes?
thanks

[AthlonXP]

ok if you like a raid 0 setup but still want the saftey of a backup then get 2 more identical drives and run a raid 10.

[protias]

ok if you like a raid 0 setup but still want the saftey of a backup then get 2 more identical drives and run a raid 10.

Couldn't you also use a syncing program to sync changed data?

[I(illa Bee]

you also need to consider data corruption, like a virus, or borked program, or just being dumb and deleting something.

If you run RAID 1 or RAID 10, (1+0) And a virus wipes out you pictures or whatever, it will be mirrored to the other disk the same way.

Off line backup is the best solution, IMO.

[runLoganrun]

ok if you like a raid 0 setup but still want the saftey of a backup then get 2 more identical drives and run a raid 10.

Do all 4 drives have to be identical, or just each pair? Don't really want to buy 3 more raptors.
Do I want 10, over 01, for raid?

[runLoganrun]

you also need to consider data corruption, like a virus, or borked program, or just being dumb and deleting something.

If you run RAID 1 or RAID 10, (1+0) And a virus wipes out you pictures or whatever, it will be mirrored to the other disk the same way.

Off line backup is the best solution, IMO.

Could I back up the raid 0 onto 1 offline, external drive, would it be bootable? I'm using the raid 0 just for OS and apps.

[Ockie]

Backup your two Raptors on RAID 0 to a nice sata drive and store the backup drive.

[I(illa Bee]

Could I back up the raid 0 onto 1 offline, external drive, would it be bootable? I'm using the raid 0 just for OS and apps.

No, if you make a RAID 0+1 array, all 4 drives will need to be online at the same time. Otherwise the RAID array detection will fail and it will not boot. The RAID 0+1 will cover you form a hardware failure, but not a software failure.

This is how I do it. (Might work for you too)
-RAID ARRAY: OS/apps/Games are all on my raptors in RAID 0
-LARGE DISK 1: I have a larger SATA drive for my DATA (single disk, docs, music, pictures)
-LARGE External Drive: that I backup too manually with synctoy. This drive I shut off, and it goes in my safe when im not using it.
-LARGE DISK 2: This is kind of optional, I have a second data drive in the computer that is on all the time like the machine. You

If a drive fails in my OS array, big deal. I replace the drive and rebuild the OS
If my data drive fails. If one of the data drive dies, I replace it and use the second data drive to restore it. If I get data corruption or a virus wipes me out, or I delete something I didn’t want to, I have the external in the safe with the data.


So if you have 4 drives that you’re thinking about running in RAID 0+1, you might want to consider 2 in RAID 0, one for DATA and one for an external. (Assuming the 2 of the drive by them selves are large enough to hold you data twice)

If you had 5 drives a RAID 0+1, with a external drive might do the job

[markintosh13]

Raid is not backup.

Buy an external HD or another internal HD sufficient to hold a couple of backups and periodically backup to that HD.

[I(illa Bee]

Raid is not backup.

Buy an external HD or another internal HD sufficient to hold a couple of backups and periodically backup to that HD.

RAID 1 is back-up, only from hardware failure, but it is still a form of back-up.

[Ockie]

RAID 1 is back-up, only from hardware failure, but it is still a form of back-up.

It's not considered a true backup for the reason that backup is basically having a duplicate piece of information in another independent area or location, which in raid, if you deleted something, there is nothing to "backup" from.

I believe a good raid system can be a backup, but it doesn't solve the problem of users deleting files or files corrupting... as there is nothing else to backup from.

[I(illa Bee]

It's not considered a true backup for the reason that backup is basically having a duplicate piece of information in another independent area or location, which in raid, if you deleted something, there is nothing to "backup" from.

I believe a good raid system can be a backup, but it doesn't solve the problem of users deleting files or files corrupting... as there is nothing else to backup from.

hence why its a backup from hardware failure only. If one of the drives dies, there is a backup copy made. I think its a good "first" defense against file lost. (you should never relay on the first defense only though

Personally, I think a true backup covers you from hardware failure, and software (ie, deleting something) It also extends to Theft, and fire damage. This takes multiple Drives or other forms of media.