Hamish Allan wrote:
> First, I partition my hard drive into three partitions:
> Beta
> Production
> Data
I'm just about to proceed with a multi-partition installation like
this, but I'm wondering about how it will interact with Time Machine.
Can I use the same TM volume for both Beta and Production?
Yes, if the TM disk has adequate free space. I've had multiple
partitions on my Leopard machine since long before Leopard. It's
currently 5 partitions (3 bootable, 2 not), and Time Machine has no
apparent difficulties with it.
Time Machine will make a sub-dir for each volume-name it backs up.
This sub-dir is located in the timestamp-named folder, which in turn
is created under the machine-named folder in Backups.backupdb on the
TM disk.
Because TM locates these sub-dirs by name (apparently), you may have
to be careful about renaming the partitioned volumes. I'm pretty
sure a renamed volume will lead to a full backup, which duplicates
data rather than using space-saving hard-links. All my partitions
have lots of data, so I'm reluctant to perform this experiment
myself, but on a partition with very little data, it would be worth a
little experiment.
TM's exclusion list stores alias-data (apparently) for each excluded
volume, so renaming an excluded volume may not cause its data to be
backed up.
As with anything undocumented and only determined experimentally, any
of this may change at any time.
-- GG
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