Mirroring allows fast recovery from a disk failure while the database server remains in online mode. When mirroring is active, the same data is stored on two disks simultaneously. If one disk fails, the data is still available on the other disk. Use the following parameters to describe mirroring of the root dbspace.
| Configuration Parameter | Description |
|---|---|
| MIRROR | Defines whether mirroring is enabled or disabled. For more information, see Using Mirroring. |
| MIRRORPATH | Specifies the full pathname of the chunk that mirrors the initial chunk of the root dbspace. |
| MIRROROFFSET | Specifies the offset into the device that serves as the mirror for the initial root dbspace chunk. For more information, see Specifying an Offset. |