This section describes the formula for estimating the size of a DAM file.

The maximum size of a DAM file is determined as follows:

Maximum size of a DAM file = maximum value satisfying F - D > 0

• F = Msize x 1048576 - [4096 + 2 x {64 x Fnum / Ssize x Ssize + (12 x Fnum + 28) /Ssize x Ssize + 16008 / Ssize x Ssize}]
• D = (Blen + 8) x (Bnum + 1)

Legend:

Msize: Value specified in the -n option of the filmkfs command

Fnum: Value specified in the -l option of the filmkfs command

Ssize: Value specified in the -s option of the filmkfs command

Blen: Length of a DAM file block to be created (unit: bytes)

Bnum: Number of DAM file blocks to be created

: Decimals are rounded up to a whole number.

For the command arguments of the damload command, specify values of Blen (block length) and Bnum (number of blocks) that satisfy the above formula.

In a DAM file, the size available to users is determined by Blen (block length) x Bnum (number of blocks) (unit: bytes).