[TriLUG] Linux Backup and Restore to totally wiped partition

[Brian Henning]

The advantage[1] of using while instead of watch is the while loop will die
automatically when killall returns its "no process killed" status.  Watch
must be stopped manually.

[1] - An advantage if you are just doing one dd'ing.  A disadvantage if
you're doing it a bunch of times.

~B

-----Original Message-----
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On Behalf
Of Joseph S. Tate
Sent: Wednesday, February 27, 2013 1:25 PM
To: Triangle Linux Users Group General Discussion
Subject: Re: [TriLUG] Linux Backup and Restore to totally wiped partition

or

watch -n 3 killall -SIGUSR1 dd

man 1 watch


On Wed, Feb 27, 2013 at 11:53 AM, Brian Henning
<bhenning at pineinst.com>wrote:

> Oh, while we're on the dd topic, a helpful hint everyone might already
> know:
>
> Sending SIGUSR1 to a dd process will cause it to spit out its progress on
> stderr.  When working with images, I often run the following one-liner
bash
> script on a separate virtual terminal after starting dd:
>
> $ while killall -SIGUSR1 dd; do sleep 3; done
>
> (This assumes there's only one dd process running; otherwise, find out the
> PID of your intended dd instance and use kill instead of killall)
>
> That makes dd spit out an update every three seconds, giving me a nice
warm
> fuzzy that it's still working (and giving me some idea of how long the
> process will take).
>
> Cheers,
> ~B
>
> -----Original Message-----
> From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
> Behalf
> Of David Brain
> Sent: Tuesday, February 26, 2013 6:29 PM
> To: Triangle Linux Users Group General Discussion
> Subject: Re: [TriLUG] Linux Backup and Restore to totally wiped partition
>
> I'be used the following for imaging successfully:
>
> dd if=/dev/sda bs=1024k | gzip -c > image.gz
>
> Can save a bunch of space, especially if the source drive isn't full...
>
> David
>  On Feb 26, 2013 4:45 PM, "Brian" <lugmail at cheetah.dynip.com> wrote:
>
> > On 2/26/2013 4:33 PM, Tarus Balog wrote:
> >
> >> Hrm, I have an external hard drive that I could use for the images. So
I
> >> would just boot to some linux with dd and then:
> >>
> >> dd if=/dev/sda of=/path/to/my/harddrive/sys1-**backup
> >>
> >> and then to restore
> >>
> >> dd if=/path/to/my/harddrive/sys1-**backup of=/dev/sda
> >>
> >
> > Indeed!  I'd also suggest messing around with the bs= option; I find a
> > block size around 1M to perform reasonably well.
> >
> > ~Brian
> >
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-- 
Joseph Tate
-- 
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