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Date:      Sat, 20 Nov 1999 02:01:21 -0500
From:      Donn Miller <dmmiller@cvzoom.net>
To:        current@freebsd.org
Subject:   dd and gzip'd files
Message-ID:  <38364741.6443C59F@cvzoom.net>

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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.

-- 
- Donn


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