Your disk can fill up. The Control Data Backup is started when the disk is 80% full. Concurrent access is allowed while the backup is running; however, if activity causes it to reach the 95% level, all LUWs are suspended. That is why having a separate monitor that kicks off the backup at a lower level is desirable. Having the activity suspended affects ever user that is actively using SFS. The documentation also says that backing up to a different filepool instead of to dasd or tape will cause less interference with the users. It will take longer, but the users will not be affected as much.
Regards, Richard Schuh > -----Original Message----- > From: The IBM z/VM Operating System > [mailto:[EMAIL PROTECTED] On Behalf Of Rob van der Heij > Sent: Monday, July 21, 2008 1:03 PM > To: IBMVM@LISTSERV.UARK.EDU > Subject: Size of SFS control backup > > I was rather surprised to see my disk for the control backup > of the filepool fill up. > I understand the backup file can only be as large as half of the disk. > But my log disks are 20 cyls, and the backup disk is 100 > cyls. So that should fit, no? > > -Rob >
