Hello, The man page did not say bs has to be a power of 2.
On a very old macppc openbsd box: vince@mini:~$ dd count=1 bs=123456789 < /dev/zero > zero.bin 1+0 records in 1+0 records out 123456789 bytes transferred in 9.833 secs (12554493 bytes/sec) On a much more recent core i7 linux: vince@dell:~$ dd count=1 bs=123456789 < /dev/zero > zero.bin 1+0 records in 1+0 records out 123456789 bytes (123 MB, 118 MiB) copied, 0,0703818 s, 1,8 GB/s This may not work with huge bs though... -- Vincent Legoll
