On Fri, Feb 27, 2009 at 11:41 AM, Brian Lloyd <brian-wb6...@lloyd.com> wrote: > On Fri, Feb 27, 2009 at 9:17 AM, Ray Andrews <k9...@rnacs.com> wrote: >> Brian, >> >> Watch your disk activity light. My old XP machine had very spikes each time >> the disk was accessed. Only solution was new PC. > > It is not happening every time there is disk I/O. I did consider that > it might be the system stopping the disks for power saving but even > that has been disabled.
Well, it turns out I lied. Turns out windows WAS stopping the disk. Somewhere along the line something, probably the upgrade to SP3, turned the power-save feature back on and set the hard drive to spin down and shut off. When something caused a disk access later and the drive was off, DPC latency went through the roof. Now that the disk is set to never turn spin down the DPC latency peak is only 2320 us. That seems within reason and works fine in Safe Mode 1. Regardless, thank you Ray for putting the bug in my ear to go back and check again. Several times now a software update has changed settings on me so I need to remember that Microsoft *will* change settings away from what the user has set. 73 de Brian, WB6RQN/J79BPL _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
