dd for err recovery

From: Raymond Moyers <rmoyers_at_nop.org>
Date: Fri May 3 02:42:44 2002

cat /dev/floppy > /test1
cat: /dev/floppy: Input/output error

-rw-r--r-- 1 root root 18432 May 3 02:09 test1

 Bad floppy right ?

So time for dd, noerror tells it not to quit
sync tells it not to aggregate a short read with the good
ones, but to fill the remainder of the short read with zeros

 so ...

 dd conv=sync,noerror if=/dev/floppy of=/test2 ( bs=defaults to 512)

-rw-r--r-- 1 root root 1474560 May 3 02:18 test2

 and we have the whole image of the proper size
 but including bad sectors filled in with zeros

 Raymond
Received on Fri May 03 2002 - 02:42:44 BST