CHECKFIRST: Allowing connected set to be recycled sooner

Explanation: CHECKFIRST is an optional parameter that allows connected sets to be recycled sooner. In determining whether to recycle a connected set, DFSMShsm requires the first tape within the connected set to meet the PERCENTVALID specification before continuing on with the calculation for the entire connected set's. You can bypass this first volume check by using the CHECKFIRST(N) parameter of the RECYCLE command. If CHECKFIRST(N) is specified, the entiredconnected set's percentage of valid data is calculated regardless of the percent of valid data on the first volume.

Notes:
  1. If you enter the RECYCLE command with the VOLSER parameter, the system ignores the CHECKFIRST parameter.
  2. Be aware that CHECKFIRST(N) causes reccyle processing to always determine the percent valid for the entire connected set, which can slow recycle performance if you have many connected sets.

Defaults: If CHECKFIRST is not specified on the RECYCLE command, then recycle performs as if CHECKFIRST(Y) had been specified.

Parent topic: Optional parameters of the RECYCLE command