Subject: Re: putting disks to sleep
To: Michael <>
From: Miod Vallat <>
List: tech-kern
Date: 04/14/2005 17:05:34
> > And something else - the SPARCbook contains circuitry to slow down the CPU
> > clock, Solaris uses it to keep the unit cool but the 3GX technical manual
> > doesn't even mention it - has anyone figured out how to use it?
> It was my understanding that only the earlier models did this... at least
> from what the SPARCbook FAQ says, the 3GX is incapable of slowing down the
> CPU.

Only the initial SPARCbook 3 (i.e. SPARCclassic in a black case) can do
this, with fixed 25, 33 and 50 MHz settings. Other SB3 models have a
dummy entry in the device tree but no actual clock control hardware.