Re: How can I speed up a dd copy?
On Thu, Jan 13, 2005 at 04:38:14PM -0800, Drumslayer2 wrote: > > Hello > When I am performing a dd between (2) 36 Gig 160 > disks (to duplicate them) it takes about 2.5 hrs. Is > there any way I can speed this up? Is there any better > way I can clone a bootable main disk? > > Thanks > > NH. Using dump(8) and restore(8) works well for me and it eliminates the need that the disks should be the same size. It may seem like a lot of work at first, but once you have done it a few times it can be done very fast. The benefit being that you don't waste massive amounts of time copying null blocks from disk to disk. A few months ago I wrote up a quick howto for the guys where I work. I make no guarantee that the directions are perfect for everyone, but they work fine here. It also assumes you are booting to a good installation of 5.x whose version of dump supports the dumping of "live" filesystems (I don't think the version with 4.x supported this, or at least not 4.8 - someone correct me if I'm wrong). However, you could just as easily boot to one of the FreeBSD install disks and eliminiate the need for a "live" dump in the first place. For reference, you can take a look at the short instructions I wrote up at: http://206.27.244.136:8080/ub/cloning.txt Nathan pgpFf6C3kZpou.pgp Description: PGP signature
Re: How can I speed up a dd copy?
In the last episode (Jan 13), Matt Emmerton said: > > When I am performing a dd between (2) 36 Gig 160 disks (to > > duplicate them) it takes about 2.5 hrs. Is there any way I can > > speed this up? Is there any better way I can clone a bootable main > > disk? > > A larger blocksize (bs=) will help dramatically. Also try double-buffering with ports/misc/team or ports/misc/buffer. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How can I speed up a dd copy?
> Hello > When I am performing a dd between (2) 36 Gig 160 > disks (to duplicate them) it takes about 2.5 hrs. Is > there any way I can speed this up? Is there any better > way I can clone a bootable main disk? A larger blocksize (bs=) will help dramatically. -- Matt Emmerton ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
How can I speed up a dd copy?
Hello When I am performing a dd between (2) 36 Gig 160 disks (to duplicate them) it takes about 2.5 hrs. Is there any way I can speed this up? Is there any better way I can clone a bootable main disk? Thanks NH. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
