RAID-1: Mirroring

RAID-1: Mirroring

If your answer was RAID-1, you are correct!

RAID-1: Mirroring. All of the data on one disk is copied exactly onto a second disk. Neither disk is the master or primary -- the disks are peers. For writes to be deemed complete, they must make it to both disks. If one disk fails, its partner keeps right on running, without interruption. The good news with this level is that it's very easy to manage and it does not require significant levels of CPU for normal operations or for recovery. The downside to this level is the expense -- for every gigabyte of disk you wish to protect, you need a second, matching gigabyte. In other words, this requires twice as much disk space as unprotected disks.

Back to the quiz!
This was last published in April 2005

Dig Deeper on Disaster recovery planning - management

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.