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Re: (OT) Storage (8*IDE HDs) any experiences?

On Sunday 29 April 2001 06:48, Brandon High wrote:
> On Sat, Apr 28, 2001 at 11:50:26PM +0200, Andreas Bombe wrote:
> > The IBM SCSI disk I have here has a jumper to delay spin up depending on
> > SCSI ID so that an array of those would spin up sequentially if they all
> > had those jumper set (and different IDs, which they need anyway).  Maybe
> > there are IDE drives built with RAIDs in mind offering some similar
> > option?
> I doubt it, but with a sufficiently large case (or small power supply) it
> may be possible to stick a 2nd (or 3rd) power supply in. Drives could be
> plugged into the second PS while the MB is powered off of the primary PS.

That sounds like a really bad idea to me.

In a regular setup the IDE controller and the drive get power from the same 
source.  So if the signals on the cable have more current going one way than 
the other then the difference will be made up on the 0V line on the PSU.  If 
you have separate PSU's then the difference will go through other lines of 
the data cable.  This is something that is likely to be fatal to drives and 

But if you try it please let me know how it works.  ;)

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