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Groups > comp.os.linux.misc > #4119
| Date | 2012-02-05 06:59 -0800 |
|---|---|
| From | John Reiser <jreiserfl@comcast.net> |
| Newsgroups | comp.os.linux.misc |
| Subject | Re: fast method of cloning a hard drive? |
| References | <4f2e7a25$1@x-privat.org> |
| Message-ID | <GaydnWkBsILIBLPSRVn_vwA@giganews.com> (permalink) |
> I try to clone a 250 GB disk PATA to a SATA drive with same CHS. Are the PATA and SATA interfaces native to the same CPU motherboard? > I use dd if=/dev/sdb of=/dev/sda > This is going for hours. In system monitor, I see one CPU going > about 30% for 20 seconds, then another CPU goes 30% for 30 seconds. > Just flip-flop forever. The HD LED is flashing. It should be ON nearly all the time. Any OFF duration should be almost unnoticeable. > System is Core 2 Quad with 6 GiB of RAM. > I think if I copied it to a USB disk it would have taken less time... 250GB in + 250GB out ==> 500GB transferred; @50MB/s ==> 10,000 seconds; about 2.8 hours. Near-perfect overlap of physical read and write still requires almost 1.5 hours. The usual practice is to specify "bs=32k" or "bs=64k" to reduce syscall overhead when using dd for such a large copy. (The default blocksize for dd is bs=512 [bytes].) Or, use ordinary /bin/cp instead of dd. --
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fast method of cloning a hard drive? "Orson Cart" <ex-privat@parts.org> - 2012-02-05 13:46 +0100
Re: fast method of cloning a hard drive? John Reiser <jreiserfl@comcast.net> - 2012-02-05 06:59 -0800
Re: fast method of cloning a hard drive? unruh <unruh@invalid.ca> - 2012-02-06 01:03 +0000
Re: fast method of cloning a hard drive? patrick <0001patrick@gmail.com> - 2012-02-06 21:04 +0000
Re: fast method of cloning a hard drive? The Natural Philosopher <tnp@invalid.invalid> - 2012-02-06 21:50 +0000
Re: fast method of cloning a hard drive? unruh <unruh@invalid.ca> - 2012-02-07 09:43 +0000
Re: fast method of cloning a hard drive? patrick <0001patrick@gmail.com> - 2012-02-21 04:20 +0000
Re: fast method of cloning a hard drive? unruh <unruh@invalid.ca> - 2012-02-21 05:40 +0000
Re: fast method of cloning a hard drive? "Orson Cart" <ex-privat@parts.org> - 2012-02-06 14:11 +0100
Re: fast method of cloning a hard drive? ray <ray@zianet.com> - 2012-02-05 15:15 +0000
Re: fast method of cloning a hard drive? Dan C <youmustbejoking@lan.invalid> - 2012-02-05 16:30 +0000
Re: fast method of cloning a hard drive? Robert Heller <heller@deepsoft.com> - 2012-02-05 10:55 -0600
Re: fast method of cloning a hard drive? Johann Klammer <klammerj@NOSPAM.a1.net> - 2012-02-06 03:17 +0100
Re: fast method of cloning a hard drive? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-02-06 23:38 +0100
Re: fast method of cloning a hard drive? The Natural Philosopher <tnp@invalid.invalid> - 2012-02-06 23:01 +0000
Re: fast method of cloning a hard drive? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-02-07 00:17 +0100
Re: fast method of cloning a hard drive? The Natural Philosopher <tnp@invalid.invalid> - 2012-02-07 01:39 +0000
Re: fast method of cloning a hard drive? Eli the Bearded <*@eli.users.panix.com> - 2012-02-06 23:50 +0000
Re: fast method of cloning a hard drive? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-02-21 21:27 +0100
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