Date: Thu, 6 Dec 2007 10:01:47 -0600 From: Eric Crist <mnslinky@gmail.com> To: Konstantinos Pachnis <kpachnis@freemail.gr> Cc: Jerry McAllister <jerrymc@msu.edu>, jamesh@lanl.gov, Steve Franks <stevefranks@ieee.org>, User Questions <freebsd-questions@freebsd.org> Subject: Re: copying just / (not /tmp, /usr, etc) (rsync -x failed) Message-ID: <985805C2-2026-4705-9D21-EA31FB9CF65F@gmail.com> In-Reply-To: <47580BC8.6050205@freemail.gr> References: <539c60b90712041638s78b4e40fn67434f2dce5e27e7@mail.gmail.com> <20071205154148.GB21074@gizmo.acns.msu.edu> <1196874620.32615.15.camel@p25dual1.lanl.gov> <47580BC8.6050205@freemail.gr>
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On Dec 6, 2007, at 8:48 AM, Konstantinos Pachnis wrote:
> James Harrison wrote:
>> On Wed, 2007-12-05 at 10:41 -0500, Jerry McAllister wrote:
>>
>>> On Tue, Dec 04, 2007 at 05:38:20PM -0700, Steve Franks wrote:
>>>
>>>
>>>> I have / on one slice, and [usr,tmp,var] on others. I want to move
>>>> just / to a new disk, which seemed to be what rsync -x ("do not
>>>> cross
>>>> filesystems") was intended for. It failed, however, as df shows
>>>> 20k
>>>> blocks in /, and rsync filled up the target slice with 50k
>>>> blocks, so
>>>> obviously it blew right past the 'end' of / - did I miss
>>>> something? Is
>>>> there no other way except to umount [tmp,usr,var]?
>>>>
>>> I would use dump/restore.
>>>
>>> Build the filesystem in the new disk partition with fdisk, bsdlabel
>>> and newfs as needed. Then mount the new partition somewhere -
>>> example:
>>> mkdir /newpart
>>> mount /dev/ad1s1a /newpart
>>> (presuming new disk is ad1, slice is 1, partition is a)
>>> Doesn't hurt to do an fsck on it here before writing to it, but it
>>> probably isn't really needed.
>>>
>>> Then, run the dump/restore
>>>
>>> cd /newpart
>>> dump 0af - / | restore -rf -
>>>
>>> This will get all of / as you want. The other mountpoints for /
>>> tmp, /usr
>>> and /var will be copied, but not the contents of those
>>> filesystems. You
>>> probably want that.
>>>
>>> ////jerry
>>>
>>>
>>>> Thanks,
>>>> Steve
>>>>
>>
>> Everyone's recommending dump/restore for copying file systems, and
>> there's something that I've never really been clear on.
>>
>> The nice thing about rsync is that it's network aware. Can dump
>> dump a
>> file system across a network?
>>
>> James
>>
>> _______________________________________________
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>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
>> To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org
>> "
>>
>>
> Hi,
> If you want to perform network backups, you should consider using a
> network aware backup solution such as Bacula or Amanda.
>
> Konstantinos
We do this little trick when we're moving an OS to a new system, and
don't want to reinstall:
https://www.secure-computing.net/wiki/index.php/Dump_Over_SSH
HTH
-----
Eric F Crist
Secure Computing Networks
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