Ick. /dev/zero is so much quicker and even faster with a larger block size. dd if=/dev/zero of=file1 bs=4096 count=254592 254592+0 records in 254592+0 records out 1042808832 bytes (1.0 GB) copied, 21.6826 seconds, 48.1 MB/s -jhs On Wed Aug 29 20:57:25 EDT 2007, Raymond Page <[log in to unmask]> wrote: > What about just popping in your favorite music cd and pulling > data from that? > > Personally I'd use dd to get the right file size (if block size > will > take you over, make it short and then append) > > On 8/6/07, Edward Allcutt <[log in to unmask]> wrote: >> On Mon, 2007-08-06 at 08:51 -0400, Allen S. Rout wrote: >> > So, for debugging purposes (long story) I want to create a >> couple of >> > files which are precisely >> > >> > 1042808832 >> > >> > bytes long. We were musing about optimal ways to do this.