Number of blocks
The required number of blocks is calculated according to the following formula:
tf_num_blks = (tf_num_rcds / x1) + 10
where
- x1 is (blk_size - 10) / (660 + 58)
- x2 is the average number of data sets per volume
- x3 is the number of volumes mounted per day
- x4 is the number of volumes scratched per day
- x5 is the number of volumes changing location (that is, vault) per day
- x6 is the number of days to retain the information in the Trace file
- tf_num_rcds = ((6 * x2 + 6) * x3 + 2 * x4 * (x2 + 1) + 2 * x5) * x6