External HD keeps turning on and off after Leopard install

Since I've installed Leopard, my external HD seems to keep turning on and off at random times (i.e. the disk starts spinning for a little while, then stops, then starts again) when I'm not doing anything to access the HD. Any ideas if this is an issue with Leopard or something wrong with my HD? It wasn't an issue before Leopard.

Glad to know that I'm not the only one and that I'm not going crazy!
At least in my situation, TM has never been turned on. It might be Spotlight, but my guess is that after being installed for several days now, that most anything needing to be indexed would have been indexed. No virus checkers installed. Also, my external HD is only for backup (not saving stuff or autosaving stuff on the external HD).
I've noticed it a bit more when using Safari, but that may be purely a coincidence. The solution I've basically used has been to eject my HD and then re-mount it when I need to use it.
If anyone knows of anything, please let us know!

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Try:
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Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
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- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
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- Restore from backup. See:
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- Restore to factory settings/new iOS device.
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- Make an appointment at the Genius Bar of an Apple store.
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Hi Wottawiz,
Thanks for visiting Apple Support Communities.
If your iPhone is turning off and on unexpectedly, I recommend these troubleshooting steps:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Will not turn on, will not turn on unless connected to power, or unexpected power off
Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
After at least 30 minutes, if:
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The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
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If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
If the display turns on, go to step 4.
If the display remains black, go to next step.
Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
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- Yes. Restoring the iPod erases the iPod.
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rb power wrote:
im having the same problems but once i get my ipod into disk mode i cant seem to restore it..
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HT1766 Hi my phone keeps turning on and off

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iPhone: Hardware troubleshooting
http://support.apple.com/kb/ts2802
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Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
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Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
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Issue not resolved
My issue is still not resolved. What do I do next?
Contact Apple Support.
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External HD keeps turning on and off after Leopard install

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