Thunderbolt Drives won't spin down and sleep in Mountain Lion

In Lion when I put my iMac to sleep, the external Thunderbolt Drives would spin down and sleep as well. In Mountain Lion, when I put my iMac to sleep, the external Thunderbolt drives do NOT spin down and sleep. Can anyone confirm or duplicate this issue?

I have the same behavior, however I'm using the TB to FW800 adapter. I have 6 FW800 drives in a chain. All would sleep when MBP was put to sleep under 10.8.5 (ironically fixed after 10.8.4, now broken in 10.9).
Seeing the same issue with native TB drives makes me think it's a problem with TB software in general.

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Thanks for those diagnostics & remedies. Those are good to know. Performed all of them but the problem persisted. I tried swapping out different drives and discovered that it was one particular Seagate drive that wasn't spinning down. So that was the culprit. Going to check out the Seagate discussions here or on Seagate and see what can be done, probably nothing.
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It's a known issue for many many brands of FW800 drives. I've been reporting this to apple for a while. With 10.9.2, my particular drives will spin down if they are mounted and unmounted but if my system wakes from sleep which will spin up all drives, they stay that way until I mount and unmount again. So....10.9.2 is a little better but FW is still borked.
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Hi,
Last week my ipod started giving me this problem, which started by it just stopping in the middle of a song (possibly because of lack of battery power).
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If you can open up the case, you can try reviving the hard drive one last time. some people have had luck with sealing the drive in a plastic bag (to keep out moisture) and putting it in the freezer, and then firing it up.
Also you could try giving it a good sharp shock, which sometimes gets you one more spin-up.
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Replace it with WD or Hitachi. My guess is it is firmware problem, though to be honest, those were all SATA drives last year (7200.9).

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Boot up holding command-r keys into your Recovery Volume.
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My Mac Pro won't wake from sleep after it is in sleep mode for several hours at a time. It will wake if the sleep period is short. But if it sleeps overnight it will not wake the next morning. Nothing seems to work. It requires a hard restart. I am running OS X 10.8.2. I read in another site that this problem was fixed for Macbook Air and Macbook Pro by turning off hibernate mode in Terminal. But I doubt this would help with my Mac Pro.
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John

https://discussions.apple.com/message/19939004#19939004

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did you ever find a fix for this?
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I have two of the LaCie 2big Thunderbolt devices (I hesitate to call them 'drives' because each device has two disk drives in the enclosure) and when I put my MBP to sleep (which is seldom) the drives 'sleep' (no spinning sounds).
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tt2

External hard drive won't shut down after switch from OS10.5 to OS10.4.11

i recently chanded my OS from 10.5 to 10.4.11 (as a programme i want to use is not compatible with leopard), but since i have done this my external hard-drive won't shut down automatically when i shut down my mac. i have to switch it off at the plug instead.
can anyone suggest how i can get it to do this again?
i'm a little concerned that i'm damaging the external drive by turning it off manually all the time..
thanks

Some hard drives shut off with shutdown, some don't. Sometimes hard drives that did shut off with one system will not do the same with a different system. My hard drives which did shut off, prior to 10.5 now stay on.
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-mj
[email protected]

Have just down loaded Yosemite over Mountain Lion, Indesign CS5 does not work ( Am dependant on it) although Bridge , Light Room and Elements operate OK How do I solve this rapidly. Can any one help on this issue. Thanks

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Hard drive packed up, but had Time Machine backup. I installed new sad and upgraded to Mountain Lion., but I can't find iPhoto library and photos or iTunes songs? Is there an answer to this? Graham

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Thank you for your help and replying to this. Guess I made my own issue!

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Thunderbolt Drives won't spin down and sleep in Mountain Lion

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