preparing for Time Machine

[Kevin Callahan]

On Oct 15, 2007, at 6:50 AM, Ashley Aitken wrote:

>
> On 15/10/2007, at 12:36 AM, Kevin Callahan wrote:
>
>> "It is possible to set up multiple disks for use with Time  
>> Machine, making it easy to create an offsite archive. It only  
>> backs up to one drive at a time however. "
>
> Unfortunately, I think this means you can backup volume A to volume  
> B and also backup volume A to volume C (so you can rotate one off- 
> site etc.)

ah ..
that's probably the best interpretation

>
> Again, due to sizeof(Volume) <= sizeof(disk) and the way Time  
> Machine works I think a backup will not be able to span multiple  
> drives, i.e. generally volume being backed up needs to be << backup  
> volume.
>
> So if you have filled up that 500GB drive and you touch quite a few  
> MBs each day, Time Machine isn't going to be very helpful.


if I add up my current data set, I have about 900 Gig  (including the  
cloning of my system)


>
> At least, not until ZFS comes along.

yeah


>
> Cheers,
> Ashley.
>
> PS Sorry about the duplicate post.
>
>