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From: Bitzer on 20 Apr 2010 13:56
Running SL 10.6.3 on a 21.5" iMac.

When my Time Machine USB drive (Samsung S2 640 GB) is attached either
directly to the computer or to a powered hub, the computer hangs at the
white screen (no Apple logo) and won't cold boot until I unplug the
drive at which point it boots normally.

I've tried different USB jacks on the computer and a different cable
without success. There is another USB drive and a flash drive attached
to the hub. Plugging/unplugging them makes no difference-- and System
Preference shows the Mac HD as the startup drive.

Interestingly, the iMac will boot normally on a restart however with the
Time Machine drive attached.

Other Macs cold boot normally with that same USB drive attached.

Ideas-- other than unplugging the drive before every cold boot?
From: Bitzer on 22 Apr 2010 17:48
Bitzer wrote:
> Running SL 10.6.3 on a 21.5" iMac.
>
> When my Time Machine USB drive (Samsung S2 640 GB) is attached either
> directly to the computer or to a powered hub, the computer hangs at the
> white screen (no Apple logo) and won't cold boot until I unplug the
> drive at which point it boots normally.
>
> I've tried different USB jacks on the computer and a different cable
> without success. There is another USB drive and a flash drive attached
> to the hub. Plugging/unplugging them makes no difference-- and System
> Preference shows the Mac HD as the startup drive.
>
> Interestingly, the iMac will boot normally on a restart however with the
> Time Machine drive attached.
>
> Other Macs cold boot normally with that same USB drive attached.
>
> Ideas-- other than unplugging the drive before every cold boot?


No ideas on this one, eh?
From: Bitzer on 23 Apr 2010 08:32
Jolly Roger wrote:
> In article <hqqg6o$4nm$1(a)news.albasani.net>, Bitzer <bitzer(a)spam.net>
> wrote:
>
>> Bitzer wrote:
>>> Running SL 10.6.3 on a 21.5" iMac.
>>>
>>> When my Time Machine USB drive (Samsung S2 640 GB) is attached either
>>> directly to the computer or to a powered hub, the computer hangs at the
>>> white screen (no Apple logo) and won't cold boot until I unplug the
>>> drive at which point it boots normally.
>>>
>>> I've tried different USB jacks on the computer and a different cable
>>> without success. There is another USB drive and a flash drive attached
>>> to the hub. Plugging/unplugging them makes no difference-- and System
>>> Preference shows the Mac HD as the startup drive.
>>>
>>> Interestingly, the iMac will boot normally on a restart however with the
>>> Time Machine drive attached.
>>>
>>> Other Macs cold boot normally with that same USB drive attached.
>>>
>>> Ideas-- other than unplugging the drive before every cold boot?
>>
>> No ideas on this one, eh?
>
> I would examine the system log to look for messages with a time stamp
> that matches the time you booted and had the problem.
>

Great suggestion. I'll do a normal boot-- and an abnormal one, print out
the log and take it over to the service people at the Apple store.
From: Jolly Roger on 22 Apr 2010 22:59
In article <hqqg6o$4nm$1(a)news.albasani.net>, Bitzer <bitzer(a)spam.net>
wrote:

> Bitzer wrote:
> > Running SL 10.6.3 on a 21.5" iMac.
> >
> > When my Time Machine USB drive (Samsung S2 640 GB) is attached either
> > directly to the computer or to a powered hub, the computer hangs at the
> > white screen (no Apple logo) and won't cold boot until I unplug the
> > drive at which point it boots normally.
> >
> > I've tried different USB jacks on the computer and a different cable
> > without success. There is another USB drive and a flash drive attached
> > to the hub. Plugging/unplugging them makes no difference-- and System
> > Preference shows the Mac HD as the startup drive.
> >
> > Interestingly, the iMac will boot normally on a restart however with the
> > Time Machine drive attached.
> >
> > Other Macs cold boot normally with that same USB drive attached.
> >
> > Ideas-- other than unplugging the drive before every cold boot?
>
>
> No ideas on this one, eh?

I would examine the system log to look for messages with a time stamp
that matches the time you booted and had the problem.

--
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