Date: Fri, 28 Sep 2001 15:46:43 +0930 (CST) From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Edwin Culp <eculp@EnContacto.Net> Cc: freebsd-mobile@FreeBSD.ORG, kjerste soderberg <kjerstes@yahoo.com> Subject: Re: cloning laptop drives Message-ID: <XFMail.20010928154643.doconnor@gsoft.com.au> In-Reply-To: <1001642875.3bb3db7b8c24b@Mail.SavvyWorld.Net>
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On 28-Sep-2001 Edwin Culp wrote: > AFAIK, the default for dd is one block at a time and that can take for ever. > You need to define the block size to something much larger. I have seen > some > cool formulas based on disk geometry but I never seem to remember them when > I need them.:-( You might try something like > > dd if=/dev/ad0 of=/dev/ad1 bs=8192 > > Hopefully someone will give you a better number. I usually pick 64k when doing this.. Also, if those drives are on the same chain the performance is going to suck really hard.. If you hit 'ctrl-t' you will get some info on dd's progress, and if you run 'systat -vmstat 1' and look at the bottom section you'll see the transfer speeds. --- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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