Effects on System Tables

The mode parameter of the disk unmirror command changes the status column in sysdevices to indicate that mirroring has been disabled.

See System Administration Guide: Volume 1 > Initializing Database Devices and Reference Manual: Commands.

Its effects on the phyname and mirrorname columns in sysdevices depend on the side argument also:

		side
		primary	secondary
mode	remove	Name in `mirrorname` moved to `phyname` and `mirrorname` set to null; `status` changed	Name in `mirrorname` removed; `status` changed
	retain	Names unchanged; `status` changed to indicate which device is being deactivated

This example suspends the operation of the primary device:

disk unmirror 
  name = "tranlog", 
  side = "primary"