hello,
i'm using ddrescue-1.7 in order to backup lots of old 3.5" floppy disks
and i'd like to make the process as efficient as possible.
as far as i know:
- high-density 3.5" floppy disks have 2 sides, 80 tracks per side, and
18 sectors per track; each sector holds 512 bytes
- double-density 3.5" floppy disks have 2 sides, 80 tracks per side, and
9 sectors per track; each sector holds 512 bytes
that said, i imagine i should use --block-size=512 --cluster-size=18 in
the first case and --block-size=512 --cluster-size=9 in the second one.
is this correct?
i'm asking because the info manual says a little different thing:
`--block-size=BYTES'
`-b BYTES'
Hardware block size of input device in bytes (usually 512 for hard
discs, *1024 for floppies*, and 2048 for cdroms). Defaults to 512.
`--cluster-size=BLOCKS'
`-c BLOCKS'
Number of hardware blocks (sectors) to copy at a time. Defaults to
64KiB / hardware_block_size. Try smaller values for slow drives (*18
is a good value for floppies*).
thanks.
p.s. do you suggest me to use the --direct option too? i run gentoo
linux (kernel version: 2.6.23)
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