Now my external firewire drives won't sleep on 2012 iMac

I have WD Mybook Studio and a Lacie2big hard drives. Now they won't sleep when the iMac is put to sleep. I guess I'll have to look for firmware updates. I checked on the WD this morning and didn't see anything new. I'll check on the Lacie tonight.
Has anyone else run into this?

Hey Guys... I was having the same spinning issue with my externals hard drives and this firmware update seemed to fix the problems. The update for the WD drives available on the WD support page.
Pick your drive on: http://support.wdc.com/product/download.asp?level1=4&lang=en
Under "For Mac" select: My Book (your drive trpe) Firmware Update - Mac
I also installed the "Turbo" software... don't know if it helped or not.
I'll try to post this info around for others to fins as well... additionally, if the problem persists I'll let you guys know.

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