... Option (see XPO)extents, physically contiguous, 355 instancesbackups, 409storing on server, 366logical log, 373Online Backup and Recovery (onbar), 204recovering, 428- 454 rootdbs, loss of, ... 123minirootbooting system to, 254 IRIX, bare-metal recovery with, 3 15 IRIX, copying to system disk, 306IRIX system, booting from, 318mirroring, 462control files, 486importance of, 52 9database ... 167Page 688log groups, 462damaged (database recovery) , 50 4damaged, restoring, 51 5 -51 7logging (Informix databases), 3 85- 387logging modes (logical log), 382logging write operations (journaling...