New VOLUME command (performance) options
Ingolf24 120000DRN3 Comment (1) Visits (1959)
The VOLUME command displays on the console a short summary of the volumes on disk or tape devices. The output shows volume usage, volumes that are shared with other systems, device capacity, device type and more.
You may use the OFFLINE command to avoid the subchannel scan for dummy devices and ONLINE before you want to use them.
With z/VSE 6.2 we introduced new parameters to reduce this impact. Now you can limit the output of devices to DISK, VDISK, ECKD, FBA (and SCSI), TAPE, VTAPE or USED / UNUSED devices.
The VOLUME command is described in the z/VSE System Control Statements book. It can be downloaded from the z/VSE Documentation page - here.