[ale] Best command to copy a mounted filesystem?

[Joe]

David Corbin <dcorbin at machturtle.com> writes:

> I want an image because I'm putting it on an identical disk....

"cp -a /mntpoint1/* /mntpoint2/*" seems to work OK. I've used it
to copy a filesystem when installing a new disk drive.
Alternatively, you can do the tar-and-untar-on-the-fly trick:

cd /mntpoint 1 ; tar -P -c * | tar -C /mntpoint2 -P -xvf -

This creates a tarfile to standard output and then immediately
untars it into the dest dir. You may want some additional
options in order to fully preserve all file attributes;
-P does permissions, but you might want other options too.
man tar.

Cheers,

-- Joe

> Robert L. Harris wrote:
> 
> >You want an image of the filesystem/partition or the contents such with
> >permissions, etc?  If you go with the image you may be sorry, what if
> >you can't get an identicle replacement disk?  You'll loose out.
> >
> >Use tar or cpio.  If you don't want a tarball but want to copy /usr to
> >/mnt/backups/usr then my prefered method is:
> >
> >"find /usr -mount -print | cpio -pdmu /mnt/backups/usr"
> >
> >
> >Robert
> >
> >
> >Thus spake David Corbin (dcorbin at machturtle.com):
> >
> >
> >> I want to copy (as in "mirror") a mounted file system for the
> >> purposes of backup.   I can think of a handful of approaches (my
> >> first, dd, doesn't seem to work). What's the best way to do this.
> >> Note: I'm not talking about make a .tar file or anything of the
> >> sort.   I want to duplicate the filesystem.  True mirroring is not
> >> an an acceptable solution.
> >>
> >>
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> >>
> >
> >:wq!
> >---------------------------------------------------------------------------
> >Robert L. Harris                     | PGP Key ID: E344DA3B
> >                                         @ x-hkp://pgp.mit.edu
> > DISCLAIMER:
> >      These are MY OPINIONS ALONE.  I speak for no-one else.
> >
> >Diagnosis: witzelsucht  	
> >
> >IPv6 = robert at ipv6.rdlg.net	http://ipv6.rdlg.net
> >IPv4 = robert at mail.rdlg.net	http://www.rdlg.net
> >
> 
> 
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-- 
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