That's exactly what MVS does. But the problem being referenced was the need to have sufficient free space on the volume to allow those "secondary extents" to be allocated. If you have datasets that get extended frequently in this way, you need to keep your volumes at a fairly low utilization so the abends are avoided. Or, you need to run disk defragmentation programs during the off shifts to consolidate multiple extents, which can cause problems with batch jobs needing to access the data, etc.
Mark Post -----Original Message----- From: Don Mulvey [mailto:[EMAIL PROTECTED] Sent: Monday, November 24, 2003 10:16 AM To: [EMAIL PROTECTED] Subject: Re: Linux CDL pack and RVA free space collection. -snip- >Typically, MVS volumes may be run at 50% full because >of the need to expand without abending a process. Dont know anything about mvs. But a format_1 dscb has room for describing multiple extents. Can't mvs automatically grow the dataset till these extent descriptors are used up before abending the process?
