On 2000-Jan-06 10:38:51 +1100, I wrote:
["dd if=/dev/rad0c of=/dev/null bs=64k" dies with an error]
I did some poking around and found that there are two bugs which
conspire together to cause this:
1) diskstrategy() does not detect dscheck() returning EOF, instead
passing a zero-length request to the underlying driver.
2) The ata-disk driver doesn't check for (and ignore) zero-length
requests, instead passing them onto the disk.
See kern/15956 for details and patches.
Peter
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