Use the CHANGEDATASET TSO subcommand to update information about data sets defined to DFSMSrmm.

BLKCOUNT(number_of_blocks)

Specifies number of data blocks used by the data set. The value corresponds to that recorded in the data set's End of File label. The minimum allowable decimal value is 0; the maximum allowable decimal value is 99999999. DFSMSrmm uses BLKCOUNT together with BLKSIZE to calculate the data set's approximate size and the sum of all data set sizes to set the volume usage.

Note: The total block count cannot be set or changed by subcommand. It is set based on information recorded during CLOSE processing.

BLKSIZE(block_size)

Specifies the data set's block size. The minimum allowable decimal value is 0; the maximum allowable decimal value is 999999. DFSMSrmm uses BLKSIZE together with BLKCOUNT to calculate the data set's approximate size and the sum of all data set sizes to set the volume usage. If the volume is OCE recorded, you can only specify this operand if you are authorized to use the FORCE operand.