Date: Tue, 29 Oct 2002 13:18:55 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Mike Hogsett <hogsett@csl.sri.com> Cc: "Mr. Darren" <darren780@yahoo.com>, freebsd <freebsd-stable@FreeBSD.ORG> Subject: Re: copy harddrive image Message-ID: <200210292118.g9TLIt49010760@apollo.backplane.com> References: <200210292048.g9TKmG1J015723@axp.csl.sri.com>
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:> I have had a harddrive which is doing the SMART imminent failure thing
:> for the last little while. I had western digital send me a new drive so
:> I could copy all my data over. I am wondering what the best way to do
:> this is? "dd if=ad0 of=ad1" doesn't seem to be like a good method..
:> any input?
:
:That method has worked great for me in the past. But I have usually done
:this with brand new disks (source being freshly installed). Also no
:partitions on either disk were mounted.
:
:I would add the argument bs=131072
:
: - Mike
What I usually do is fdisk and disklabel the new disk, which gives
me a chance to adjust the size of the partitions. I then dd each
partition across (e.g. dd if=ad0s1a of=ad1s1a) for those partitions
whos sizes didn't change, fsck them after I'm done, and use 'cpdup'
(/usr/ports/sysutils/cpdup) to copy the rest via mounts.
The advantage of using cpdup is that you can do it on a live system,
take the system down to single user, do cpdup again to catch
whatever changes from the first run (usually very little, so cpdup
only takes a few seconds the second time), then power off, swap the
drives, and reboot. Total actual down time: 5 minutes or less.
DDing the entire disk works too, at least if the system is idle. Be
sure to fsck the destination drive though before mounting it.
-Matt
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