Explanation: ABARSBUFFERS(n) is used to specify the number of I/O buffers to be used by ABARS when DFSMShsm is used to read or write data sets during aggregate backup and recovery processing. This parameter does not affect the number of buffers used when DFSMSdss is invoked to DUMP or RESTORE data sets.
n specifies a number in the range of 1 to 9 indicating the number of buffers used for I/O processing. This number is internally multiplied by two (a buffer for input and a buffer for output).
SMS relationship: Parameter has the same meaning when applied to SMS-managed or non-SMS-managed DASD volumes or data sets.
SETSYS default: If the number of buffers is not specified by the SETSYS ABARSBUFFERS(n) command, the default is one.