Paul Eggert wrote: > "Dat Head" <[EMAIL PROTECTED]> writes: > >> dd if=/dev/zero of=/dev/null count=100 bs=1024k >> 100+0 records in >> 100+0 records out >> 104857600 bytes (105 MB) copied, 0.00933139 seconds, 11.2 GB/s >> ---------------------------^^^ should be 100 MB > > No, "MB" means megabytes (i.e., 10**6 bytes). I guess you want > mebibytes (i.e., 2**20 bytes), but the standard abbreviation for that > is "MiB", not "MB". See <http://physics.nist.gov/cuu/Units/binary.html>. > > It might be reasonable to add support for binary multiples to "dd", > but for media the decimal numbers are probably more useful. As you > mentioned, most media are measured in decimal multiples nowadays.
There is support for binary multiples in dd, as I've summarized in the help output from my truncate util¹ <size> is a number which may be optionally followed by the following multiplicative suffixes: b 512 KB 1000 K 1024 MB 1000*1000 M 1024*1024 and so on for G, T, P, E, Z, Y > My favorite was the old "1.44 MB" floppy, which contained 1.44 * 1024 > * 1000 bytes. Almost anything is better than that sort of confusion! cool! You learn something new everyday. cheers, Pádraig. ¹ http://www.pixelbeat.org/scripts/truncate _______________________________________________ Bug-coreutils mailing list Bug-coreutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-coreutils
