Timing on a 4.9 gig partition
# time dd if=/dev/rwd0d of=/dev/rwd1d bs=64k conv=noerror
time dd if=/dev/rwd0d of=/dev/rwd1d bs=64k conv=noerror
81956+1 records in
81956+1 records out
5371101184 bytes transferred in 90.720 secs (59204871 bytes/sec)
1m30.75s real 0m0.07s user 0m6.12s system
# time dd if=/dev/rwd0d of=/dev/rwd1d bs=64m conv=noerror
time dd if=/dev/rwd0d of=/dev/rwd1d bs=64m conv=noerror
80+1 records in
80+1 records out
5371101184 bytes transferred in 177.356 secs (30284285 bytes/sec)
2m57.44s real 0m0.00s user 0m6.80s system
time dd if=/dev/rwd0d of=/dev/rwd1d bs=1m conv=noerror
time dd if=/dev/rwd0d of=/dev/rwd1d bs=1m conv=noerror
5122+1 records in
5122+1 records out
5371101184 bytes transferred in 98.884 secs (54316759 bytes/sec)
1m39.01s real 0m0.01s user 0m6.15s system
# time dd if=/dev/rwd0d of=/dev/rwd1d bs=32k conv=noerror
time dd if=/dev/rwd0d of=/dev/rwd1d bs=32k conv=noerror
163913+0 records in
163913+0 records out
5371101184 bytes transferred in 92.276 secs (58206851 bytes/sec)
1m32.42s real 0m0.11s user 0m9.71s system
# time ( dd if=/dev/rwd0d bs=64k | dd of=/dev/rwd1d bs=64k conv=noerror )
time ( dd if=/dev/rwd0d bs=64k | dd of=/dev/rwd1d bs=64k conv=noerror )
81956+1 records in
81956+1 records out
5371101184 bytes transferred in 91.064 secs (58981483 bytes/sec)
81956+1 records in
81956+1 records out
5371101184 bytes transferred in 91.063 secs (58981662 bytes/sec)
1m31.20s real 0m0.07s user 0m11.44s system
