linuxaudio.org

> what's ironic though is that its now reasonably well documented that

quoted text
> 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

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