[tempestn]

"Technical support informed me that my first HD died 20 days into my contract. The backup HD hummed along for a year."

That sounds more like RAID than a backup HD.

[gregd]

This doesn't sound like RAID at all. How are you guys coming to this conclusion? At best it sounds like a server with a master/slave hard drive setup...you know, something from the early 2000s.

[ams6110]

Two mirrored disks is technically a RAID level that can survive failure of one disk. I worked at a company in the late 1990s that had mirrored disks, they would "split" the mirror at the end of the business day, backup to tape from one disk and run nighttime batch jobs on the other disk. Before start of next business day they would backup the batch disk to tape, then resync the mirror.

[Brandon0]

A master/slave hard drive setup would have data loss. If the main hard drive died and it wasn't a RAID, surely they would have noticed.

[underwater]

Mirrored disks are RAID 1: http://en.wikipedia.org/wiki/Standard_RAID_levels

[marcosdumay]

Looks like RAID 1.

You probably expected something like RAID 5, well, you are right, it's not.

[gregd]

Where did it say these were mirrored drives?