External Hard Drive won't spin down...

[imofean]

My hard drive won't spin down even it's idle for a while.
When I put my iMac into sleep, the hard drive will spin up every 15 - 30 mins and then goes back to sleep.

I keep getting this message in Console while the mac was sleeping. Are they the cause of this problem?

Thanks!

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished.config
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.signature3: 1
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished.pv
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.signature3: 0303
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished.cs
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.signature3: c030
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished.key_type
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.signature3: rsa
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished.kxSigAlg
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.signature3: 05_01
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished.curve
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.signature3: p256
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:23.813 PM syncdefaultsd[1084]: com.apple.message.domain: com.apple.coretls.client_finished
com.apple.message.signature: tls
com.apple.message.signature2: com.apple.syncdefaultsd
com.apple.message.value_events: 1
com.apple.message.value_alpn_received: 1
com.apple.message.summarize: YES
SenderMachUUID: DD127F23-3398-3802-A227-EE5CE809CCAA

25/5/2016 3:44:24.152 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:25.261 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:26.376 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:27.473 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:28.567 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:29.672 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:30.787 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:31.889 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

25/5/2016 3:44:33.011 PM apsd[80]: OSActivityID: 0x0000000000000f8a
com.apple.message.domain: com.apple.apsd.15918893
com.apple.message.signature: 1st Party
com.apple.message.signature2: N/A
com.apple.message.signature3: NO
com.apple.message.summarize: YES
SenderMachUUID: 5F6A4FB9-8243-3F61-B414-F74D87A45F85

 

[fisherking]

i bought 2 new external drives recently, was suprised they did not have on-off switches. they would spin up when i put my macbook pro to sleep. so...i got one of these:
http://smile.amazon.com/GE-25511-Gr...1&redirect=true&ref_=oh_aui_search_detailpage

i let them spin down (after ejecting them), then turn the power off.

 

[richard2]

What is the manufacturer and model of the disc drive?

 

[Shirasaki]

HDD from some manufactures does not sleep after a while if it is being disconnected from computer. Turning off computer would cause HDD stop spinning in moments. I think this is due to HDD firmware and controller not able to let disk spinning down and turning off entirely.
I have bought a lot of WD My Passport HDD and all could auto spin down after disconnecting from computer.

But you say your HDD spins up every 15 -30 min and goes back to sleep. Then I think this might relate to Mac OS X. I don't know more detail about this though.