From: James Jolley on
On 2010-04-28 12:31:38 +0100, usenet(a)alienrat.co.uk (Woody) said:

> James Jolley <jrjolley(a)me.com> wrote:
>
>> On 2010-04-28 12:25:55 +0100, usenet(a)alienrat.co.uk (Woody) said:
>>
>>> James Jolley <jrjolley(a)me.com> wrote:
>>>
>>>> On 2010-04-28 10:31:36 +0100, usenet(a)alienrat.co.uk (Woody) said:
>>>>
>>>>> So the iMac is fixed and good with its new disk. Problem is, as soon as
>>>>> I switched time machine on, it wants to back up the whole disk again,
>>>>> even though the only files on it were the files it put there in the
>>>>> first place, becsue the disk has changed.
>>>>>
>>>>> I found a hint on MacOSXHints.com, but it relates to 10.5 and doesnt
>>>>> seem to work on 10.6.
>>>>> I thought I would let it back up the disk anyway as it was a faff
>>>>> otherwise, but after leaving it 7 hours last night it had still only
>>>>> done a quarter of it.
>>>>>
>>>>> Anyone know how to tell it to treat the disk the same as the last one?
>>>>
>>>> No I actually don't but i'm amazed it would take 7 plus hours. When I
>>>> was testing this at the time, Time Machine was always fast at backing
>>>> up the install but I wonder if the drive is full? The backup one I mean.
>>>
>>> It is trying to backup 189 GB, and it has about 275GB free, so it
>>> shouldnt' have too much of a problem.
>>
>> No. Something's really gone wrong then because on my system here,
>> there's a good 57 GB of audio dramas on there, plus the system and
>> apps. It's only 100 or so GB of space used but that's not much of a
>> difference. I'm not sure where this 7 plus hours comes from either. Is
>> the drive internal?
>
> No, it is an external firewire drive. It has worked fine all the time
> until now, and it only took 2 hours to recover the whole disk when the
> disk was changed.

I'm at a loss then. That's far too long a wait for a single backup. I
have tried TM on external firewire 400s and internal drives and it's
been obviously quicker with the internals but not much in it.

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