ISOSIZE(8) SG_UTILS ISOSIZE(8)
isosize - outputs the length of a iso9660 file system
isosize [-x] [-d <num>] <iso9660_image_file>...
This command outputs the length of an iso9660 file system that is con-
tained in given file. That file may be a normal file or a block device
(e.g. /dev/hdd or /dev/sr0). In the absence of any switches (or errors)
it will output the size of the iso9660 file system in bytes. This can
now be a large number (> > 4 GB).
-x output in humanly readable form the block count and the block
size. Output uses the term "sectors" for "blocks".
only has affect when "-x" is not given. The number output (if no
errors) is the iso9660 file size in bytes divided by <num>. So
if <num> is the block size then the output number will be the
The size of the file (or block device) holding a iso9660 file system
can be marginally larger than the actual size of the iso9660 file sys-
tem. One reason for this is that cd writers are allowed to add "run
out" sectors at the end of a iso9660 image.
sg3_utils-0.91 December 2000 ISOSIZE(8)
Man(1) output converted with