Disk Mirroring Commands

The disk mirror, disk unmirror, and disk remirror commands control disk mirroring. You can issues any of these commands while the devices are in use. In other words, you need not stop databases to set up or modify disk mirroring.

Note: disk mirror, disk unmirror, and disk remirror alter the sysdevices table in the master database. After issuing any of these commands, dump the master database to ensure recovery in case master is damaged.