Due to a total loss of display (which I'm hoping will turn out to be
<http://support.apple.com/kb/TS2377>) I've had to migrate from one MacBook Pro
to another.
All (well, most) went pretty smoothly. However, I then plugged in the
external drive that I use for Time Machine, and got the message:
Would you like to reuse the backup
"/Volumes/MyTMbackup/backups.backupdb/Foo" with this computer?
The backup was created on a different computer. If you reuse
this backup it can no longer be used by the original computer.
[Do Not Backup Now] [Create New Backup] [Reuse Backup]
I selected "Do Not Backup Now" and settled back to think about it.
Here's what I'd like to happen:
_TM adopts the backup, notices that most stuff on it is identical, and does an
incremental. When I go into TM, I see the changes I've made on the new
machine, and as I scroll back through time, I'm seeing what I had on the old
machine. If I get my old MBP repaired and migrate back to it, I'll get the
same dialog again, but will then find I have a TM backup that stretches back
smoothly through the three incarnations._
Here's what I'm scared might happen:
_TM deletes the old backup and starts a new one. If I make some hideous
mistake before it's managed to complete a new global backup, I'm screwed.
Even assuming I don't do that, I lose the ability to go back to a file that I
deleted or modified a month ago and only now realise that I need. Time will be
restarted at today. History will be erased._
Has anyone else been in this situation - do you know what will happen if I use
either "Create New Backup" or "Reuse Backup"?
The internal drive on my old machine was named "Foo". The internal drive on
this machine is named "Bar". Would things be improved if I renamed it to
"Foo" before venturing near TM again?
TIA for any advice,
Ben
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