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Re: [Logic_Cafe] defrag by booting off another computer.

2005-02-10 by amgmamgma

GAmoore@... <GAmoore@...> wrote:
: Regarding sustained rates : Wouldn't you get more throughput if you had two 
: drives hooked to firewire - so that the delays in head repositioning on one 
: drive allow the bandwidth for the other.

Well, the drives won't coordinate their efforts exactly, but sure. The bottom
line is that you won't get more total throughput than the bus allows, so
the bus will eventually become a bottleneck as you add more devices do it.

If I have two drives that are capable of putting out 30 MB/s each, and I
read from both of them simultaneously at the same priority across 400Mb
Firewire, the throughput on each will be capped at somewhere below 25 MB/s
average (allowing for protocol overhead). My total throughput will be
greater than that of either drive individually, though. You could build a
RAID-0 array out of external firewire drives and probably get pretty close
to pushing the max throughput of the bus.

: Regarding defragging : I think I am in the situation now where i have various 
: gigs free but there might only be 50mb free space chunks. So what happens 
: when I go to record 6 minutes of stereo audio that takes up 60 mb? Couldn't that 
: cause a click or glitch at the point it needs to stop fragment the incoming 
: file?

Stereo audio requires so little speed that it can be fragmented all over
the place with no glitches. Now, once you start accessing multiple files
simultaneously that are fragmented randomly all over the drive, it may
start to have an effect on performance.

-- 
 agreenbu @ nyx . net                             andrew michael greenburg

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