I am using a 3.5" SATA HDD from the eSATA port of my laptop. The HDD is powered with another ATX power supply. Each time I unplug the eSATA, I cannot make the HDD spindown before I power off the ATX.
So, any tool to do this?
Have you tried savely removing it (perhaps only for USB) or unmounting the drive?
You can treat the eSata like a HDD you're trying to hot swap, thus turning it off. But instead of swapping it, you just leave it off.
I just find hdpram have win edition. The check function works under Win7 x64, set function not tested as my extHDD is at home.
HotSwap! is good and the UI is good too.
hdparm will not work with all SATA controllers, (for example, I have Promise FastTrak TX2300 and hdparm issues an error message).
I think there are other utilities that may work, for example sdparm and sg3_utils, both have a Windows port. I will try them.
Hard Disk Sentinel at www.HDSentinel.com is a good tool that lets you adjust your Advanced Power Management of each individual hard drive. It allows a range of settings that effect the spindown (or not). It also lets you adjust the AAM (Advanced Acoustic Management) - how loud the hard drive sounds vs the tradeoff of increased seek performance.
The free version has a nag screen but lets you adjust all these indefinitely.