Friday, April 5, 2013

Why backups if you have a NAS?

I recently bought a Synology DS212j and set up a SHR (RAID1 with extra features). Then - after some toyingthorough feature evaluation - I configured backup tasks using the Time Backup extension.

Why, you might ask, do you really think two hard disks are going to crash at the same moment?

No, I don't. But mirroring doesn't protect us against files being corrupted by faulty applications. Or accidentally deleted. Thanks to Jeff Mitchell for the reminder.

BTW: What IS the probability of two hard disks in a RAID array failing? Two hard disks from the same lot? With the exact same load through all their lifetime? Within the time frame that it takes to rebuild the RAID?

No comments:

Post a Comment