Shared Tape Allocation Manager (STAM) Facility › Considerations for Sharing Tape Drives

Considerations for Sharing Tape Drives

STAM Record

Specify either the CMS or DISK parameter on the STAM configuration file record when sharing tape drives among VM systems:

• When you use the CMS parameter, the STAM control file resides in a reserved area on the CMS disk that contains the TMC. The STAM record looks like this:

  STAM AUTO CMS

• When you use the DISK parameter, the STAM control file resides on a dedicated disk. For example, the following STAM record causes CA VM:Tape to maintain the STAM control file on device 1AA:

  STAM AUTO DISK 1AA

The disk must not contain CMS files because CA VM:Tape uses a special format to maintain the control file. Format the disk before using it with the VMTSTF utility.