[X4U] disk size for Time Machine

[B. Kuestner]

> I guess the space needed will vary a lot depending on the  
> configuration. But do you know whether there are any already any  
> recommendations out there, 2x the hard-disk? 3x?

I would be surprised if it's anything other than "as much as you can  
afford". Even with differential backups and compression or whatever  
other tricks, having a lot of storage space available will facilitate  
the job of fine granularity in your versioning with long retention.

With Time Machine working on the same drive I expect that disk  
fragmentation might become a whole new issue. The way I understand  
Time Machine, it will always try to use as much of the disk as  
possible to invisibly store old. Here, too, a large drive will be  
beneficial.

Björn