On Mon, Sep 30, 2002 at 03:55:36PM -0500, Jack L. Stone wrote: > At 03:50 PM 9.30.2002 -0500, Pranav A. Desai wrote: > > > >Hi all! > > > > Can I use something like > > > >dd if=/dev/ad0 of=/dev/ad1 > > > >to copy every thing from first drive to the second and be able to boot > >from the second drive? Do I need to specify block size ? The second drive > >doesnt have anything on it (filesystem or slices). > > > >Thanks > > > >-Pranav > > > > You would use this for IDE HDs: > # dd if=/dev/ad0 of=/dev/ad1 bs=8192 #Change the "bs" switch to something > that works best for you. > > Of importance is that ad1 be equal to or larger than ad0. If larger, then > that larger portion will be unusable. >
To make the new disk bootable you want to copy the disklabel and bootstrap code -- but then you probably also want to do that on a slice rather than the disk device (e.g., "ad0s1" rather than "ad0") -- check your setup. So you might do something like this: # example only, don't cut & paste dd if=/dev/ad0s1 of=/dev/ad1s1 bs=128k # for ata disklabel /dev/ad0s1 > disklabel.ad0s1 disklabel -R -B /dev/ad1s1 disklabel.ad0s1 - Rob -- Rob Ellis <[EMAIL PROTECTED]> System Administrator, Web Networks To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
