On 9/19/17, Thomas Schmitt <scdbac...@gmx.net> wrote: > > (If you aren't subscribed to the debian-user list, then better do. > Normally replies are sent without Cc: to individual mail addresses.) > > Tibor Mate wrote: >> >> Disclaimer: I am just a user.
Self-incriminating admission: Me, too. :) > The noise timing which you describe and the behavior with old systems > gives the suspicion that it has something to do with the "power mode" > of the disk. I.e. when it gets into power saving mode, it begins to sing. > > Some info can be seen at > https://www.smartmontools.org/wiki/Powermode > > I would try to verify the suspicion by having a little loop which reads > some random block from hard disk every 15 seconds. > But probably you can already verify by > > not_yet_read_file=...some.freshly.chosen.path... > > dd if=$not_yet_read_file of=/dev/null > > whether the singing ends when the disk becomes busy. My apologies that a reboot to test my memory and get specifics will... create too much upheaval just this second, BUT... in the last couple days, I saw something that I can't quite completely remember. Whatever I'm remembering is in BIOS. It was about a setting specifically related to the hard drives. It referenced older hard drives (am highlighting that to help nail down the right feature). One of that feature's settings was about letting the manufacturer's design within the hard drive itself have its own head to control things. I may be remembering wrong, but my take at that second was that it might have been about the drive spinning up and down AND that it was something standalone within that component. It was one of those "Wow, I had NO idea all THAT was going on inside those bricks". :D Seems reasonable to mention it here. My memory recall is that it might have been something about efficiency which is the feel I'm getting about this thread. I'd never heard of that BIOS setting nor seen it before. Whatever it was is an intended #toDo to dig up more details. Cindy :) PS I was just verifying Tibor's name (for the email address field) before sending and now see Alexander's reply. Maybe "Advanced Power Management " is what I saw if that's something's that completely within the hard drive and is something the hard drive can do by itself with no outside intervention.. AND is something that can be affected by a BIOS setting, to boot. :) Or not. :D -- Cindy-Sue Causey Talking Rock, Pickens County, Georgia, USA * ARRRGGHHH! Still need to feed the fishes! #toDo. Literally :D *
