I have a 4TB G Drive with Firewire 800 connected to a mid 2010 iMac i7. Regardless of the System preference setting, the drive quickly goes into sleep mode, but is very slow to wake from sleep. When I click on the drive icon, I have to wait several (sometimes 15) seconds for the drive to respond/open. I currently use this drive for my iTunes library, and if I don’t “wake” the drive before opening iTunes - iTunes will give an error, discard the existing library file & create a new blank/empty library. VERY annoying & time consuming.
Is there any means of changing the sleep settings to speed up access time?