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

[Vince]

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?
>>

Not following the rest of the thread so sorry if a duplicate answer.

you can easily dump to a file across a network if you have ssh configured.
something like
dump -f - /dev/ad1s1 | ssh user at remotehost "cat >
/path/to/dumpfile.ad1s1.oldhost"


Dump can also talk to remote tape devices using rmt apparently but I've
never tried this.


Vince

>> 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
> 
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