> On 25 Nov 2014, at 2:08 pm, Stephen Chape <[email protected]> wrote:
> 
> Hi Ronni,
> The problem I have with that is that my USB portable HD ejects if iMac is put 
> to sleep.

That is the fault of the USB portable HD not the iMac going to sleep.
The USB Drive is not entering 'standby mode' when the iMac is placed in sleep.

> That HD is my Time Machine Backup.
Time Machine won't do a backup while the iMac is sleeping.
> 
> So since I replaced my large mains HD with this one about a year ago, I no 
> longer sleep my iMac.
> I shut down every night and re-start each morning.

That is your choice, which is fine.
But it really doesn't have anything to do with Alan's issue with a 'suspect' HD.

Cheers,
Ronni
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