[Novalug] OT: Disk cloning - new hard drive in workstation [IBM/Fujitsu]
jhart at kevla.org
Tue Sep 9 13:25:01 EDT 2008
I think this topic would be great for a NovaLUG demo doing the meeting.
Couple of dummy drives with iso files, for using to dd stuff between drives
> The last time I used dd for cloning was about 4 years ago, when I was moving
> installations between partitions on a G5 XServe, and I think I was using a
> blocksize of 1M. The
> partitions were the same size.
> I was doing some googling a few weeks ago and did see some references to using
> dd as a
> cloning tool, and how to handle cases where the drive being cloned was
> damaged, or where
> an incomplete buffer was read.
> -------------- Original message ----------------------
> From: Jon LaBadie <novalugml at jgcomp.com>
>> On Tue, Sep 09, 2008 at 12:34:58PM -0400, Nick Danger wrote:
>> > Ken Kauffman wrote:
>> > > I use dd. If you want to clone over the network from one machine to
>> > > another, use dd piped to netcat on the push side and netcat piped to
>> > > dd on the pull side.
>> > I used DD once, and it took an insanely long amount of time to move a
>> > partition over. I chalked it up to dd and never used it since, but maybe
>> > I was doing something wrong if people are using it regularly to move
>> > partitions around?
>> Typically dd defaults to copying 512 byte size "blocks" at a time.
>> Nice that it matches the common sector size of a disk, but so slow
>> for large transfers.
>> Things often speed up nicely by using a larger blocksize, say 8k.
>> I've not used it for disk cloning. What blocksize do those that
>> do use dd for disk cloning recommend?
>> Jon H. LaBadie jon at jgcomp.com
>> JG Computing
>> 12027 Creekbend Drive (703) 787-0884
>> Reston, VA 20194 (703) 787-0922 (fax)
>> Novalug mailing list
>> Novalug at calypso.tux.org
> Novalug mailing list
> Novalug at calypso.tux.org
More information about the Novalug