Hello (somebody here ?)
What is this -B option exactly ? Where do i find information on this apm-for-HD's ?
Or is it simply a combination of -S and -M ?
has kinda allot of info...google for more!
The -B option simply tells the drive firmware to use a specific power management mode. These are vendor-defined, and often do more than the simpler -S (spindown timeout) does.
-B often also sets a spindown time of it's own choosing, but also powers down parts of the on-drive electronics before / instead / after spindown, giving a more comprehensive power-savings effect.