On Sun, 2009-08-02 at 14:38 -0400, Robert P. J. Day wrote: > On Sun, 2 Aug 2009, Patrick O'Callaghan wrote: > > > On Sun, 2009-08-02 at 12:54 -0500, Mikkel L. Ellertson wrote: > > > Bazooka Joe wrote: > > > > Is there a way to combine these 2 commands to cut my time in half? > > > > > > > > VBoxManage internalcommands converttoraw file.vdi file.raw > > > > then I have to run > > > > dd if=file.raw of=/dev/sdb > > > > > > > > -thx > > > > > > > You can can command on the same command in several ways. It depends > > > on what you put between the command. > > > > > > ; - always run the next command. > > > && - run the second command only if the first command is successful. > > > || - run the second command if the first one fails. > > > > How is this going to reduce his total time? The commands are still > > running sequentially. > > i'd bump up the blocksize of that dd command. IIRC, the default > blocksize for dd is 512 bytes -- painfully small and resulting in lots > and lots of little writes. crank up the blocksize significantly and > that second command should speed up noticeably. That's often true, but it depends a lot on the natural blocksize of the target device. Also, if it's something like a pendrive it doesn't seem to make any difference, given as most of the time is spent in kernel buffers anyway (even the fastest are a lot slower than RAM and they don't use DMA). poc -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
