copying just / (not /tmp, /usr, etc) (rsync -x failed)

[Konstantinos Pachnis]

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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>   
Hi,
If you want to perform network backups, you should consider using a
network aware backup solution such as Bacula or Amanda.

Konstantinos