On Sat, 20 Nov 1999, Donn Miller wrote:
> I recently tried using dd to transfer a binary image to floppy.
> It was the Linux root disk image, color.gz. Basically, dd works
> ok with non-gzipped files, but with files in gzip format, it
> chokes:
>
> root@lc186 floppies# dd if=color.gz of=/dev/rfd0
> dd: /dev/rfd0: Invalid argument
> 2453+1 records in
> 2453+0 records out
> 1255936 bytes transferred in 42.665771 secs (29437 bytes/sec)
>
> Notice the line that says:
>
> 2453+1 records in
> ^^^^^^
>
> For some reason, it is offsetting to 1 before writing to disk.
> Rawrite.exe does this correctly. I tried with net.i, and it gave
> me no problems:
>
> root@lc186 floppies# dd if=net.i of=/dev/rfd0
> 2156+0 records in
> 2156+0 records out
> 1103872 bytes transferred in 39.172698 secs (28180 bytes/sec)
>
> I tried skip=0, but that didn't work. Apparently, dd has some
> limitations with what kinds of files you can transfer to
> floppies. I downloaded the files in binary format, so there's no
> problems there.
no, you must write in block sized chunks when writing to raw
devices or it'll get mad at you, try figuring a way
to use a blocksize of 16k and padding it to a 16k boundry.
if that doesn't work, then please tell us what you tried.
-Alfred
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