Randall R Schulz wrote:
On Thursday 14 February 2008 06:18, Greg Freemyer wrote:
...
Per,
I don't know how you measured the load, but it is important to measure very short power surges. In particular, I'm suspicious of that load during raid1 resync. Could your technique catch a 10 msec spike etc?
Surely the capacitors in the power supply and elsewhere would absorb such brief demand spikes, no?
Not so much absorbing spikes as much as to provide extra current needed for the spike demanded by system components -- without the current spike the sudden increase in demand results in voltage spike which sags (i.e. goes to ground instead of higher potential).
And what is their source? Logic circuits active only transiently or the voice coil? Obviously the spindle motors have uniform demand once the drive is spun up (but much higher while starting up, of course).
Motor activation is a big one. They all demand power surges to get moving. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org