[NTLUG:Discuss] backing up a full disk image to external disk

[Ed Leach]

Sorry, I should have been more specific.

This is a default Ubuntu install, so ext3.

I'd prefer a full disk image of some kind as this is a one-time snapshot 
of the hard disk.

David Stanaway wrote:
> Using the dump utility for the filesystem might be a better option.
>
> What filesystem are you using?
>
> If you want to re-sync the data from time to time, perhaps rsync.
>
> Another option is to create a filesystem on the external filesystem and
> do incremental dumps.
>
> EG, with an xfs filesystem, you could create a full dump
>  and then run differential dumps using xfs_dump to a file on the
> external filesystem
>
>
>
> Ed Leach wrote:
>   
>> What is the best way to backup a full disk image to an external hard 
>> disk that is bigger than the disk being backed up?
>>
>> On my desktop I have two identical internal hard disks. I just boot to a 
>> live distro and do a dd from one to the other.
>>
>> This time I need to backup an 80 gig laptop hard disk to an external 120 
>> gig disk. Do I create an 80 gig partition on the external disk and then 
>> do something like:
>>
>>    dd if=/dev/sda of=/dev/sdb1
>>
>> I think there is a better way but don't know what it is.
>>
>> Thanks,
>>
>> Ed
>>
>>
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>
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