Time Machine acting strange on MBP. Advice sought

[kdum8]

So something strange has happened to my time machine backup. The backup repeatedly was reported as having being "delayed" and would not backup even if I told it to manually do so. I then tried to "change disk" and re-select the existing drive in case that fixed it.

Unfortunately my mac doesn't seem to recognise that it is a time machine drive and wants to erase everything and start again. The problem is that I have months and months of back records on the TM drive so I would rather not have to erase everything and just have the current backup.

There is nothing wrong with my drive as fas as I know. I did just get the mac back from the apple store (logicboard was replaced) and had to re-authorize iTunes. It is my first attempted backup since then. I don't know if that is related.

Has anyone else had similar problems or is aware of a fix? I am not sure what to do. Any advice would be most gratefully received.

 

[MacDawg]

My experience has been when you have the logic board replaced "yes" you will need to restart a new Time Machine backup. Your computer is seen as a different machine in some ways.

 

[Hal Itosis]

Here is the corresponding tip at macosxhints:

10.5: Repair Time Machine after logic board changes + 106 comments!!!

[not having done it myself, i can't really comment much further just now.]

 

[kdum8]

My experience has been when you have the logic board replaced "yes" you will need to restart a new Time Machine backup. Your computer is seen as a different machine in some ways.

Here is the corresponding tip at macosxhints:

10.5: Repair Time Machine after logic board changes + 106 comments!!!

[not having done it myself, i can't really comment much further just now.]

Thanks both of you for diagnosing the problem and suggesting a solution. Much appreciated. In the end I just deleted the drive but it is good to know that there is an alternative possibility for a future occasion.

Cheers.