RAID 1 - quick question

Conrad11 · 23 Jul 2009 at 16:14

If one of the disks gets data corruption, surely that means the second disk does right? Therefore does RAID 1 protect only against complete hard drive power failure?

If not, what is there to protect the second disk from screwing up if the first does?

AbsenceJam · 23 Jul 2009 at 16:38

That's correct. RAID isn't a backup solution, it protects against all-out hardware failure.

HazardO · 23 Jul 2009 at 16:39

It depends how the data was corrupted. If the OS just writes junk to the disks, then 2 copies of junk is what you'll get, but if one drive is on it's way out and giving occasional write errors, or suffers a head crash, then you still have one disk with good data on it which can be used on it's own until a replacement for the other drive is purchased.

Subterranean · 23 Jul 2009 at 17:38

The only way to cope with what you suggest is with well scheduled backups.