> what's ironic though is that its now reasonably well documented that > if the disk drive is in the line of fire when they start to play loud, > it really will be unable to keep up. this has nothing to do with bit > rates, but is (probably) caused by the the vibrations causing read > failures which necessitate a lot of retrys, thus slowing down the > effective streaming bandwidth of the disk. if the disk is kept out the > way of direct incoming sound, the issue goes away. > > yes, really! Really? I've often wondered about that, but despite doing hard disk recording for the past ten years now (And I've run some very loud shows where the whole FOH was shaking) I've never had a hard disk flag trouble with vibration. I've always used notebook dgrade drives though... maybe that's the difference. They all have accelerometers and actively monitor vibration to cancel it out (and detect if the notebook is dropped. 0G == park the heads now!) OTOH, most enterprise grade HDs do this too, as they're designed to be mounted by the hundred in a single rack, and that can shake a rack good just from all the mechanical actuators being shot from one position to another at highest possbile speed. If you've ever held a naked drive in your hand while it's running, those things can kick.. I know my raid box on my personal workstation (8 high speed enterprise drives) shudders hard when all the disks are slamming the heads around full-tilt. I feel it in my keyboard six feet away when the raid is doing a journal flush. Pro drives don't do 'quiet mode' (one reason I'm glad to see SSD becoming affordable! :-) Monty _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
