[Avid-L2] Saturday Night Drive?

Why is it I find myself spending an exciting Saturday night voltage checking drive enclosures?  Never mind that but here's my quandary.  I have to NexStar 3 FW/Esata/USB2 drive enclosures.  One model has FW 800 the other FW 400 everything is identical even the Wall wart power supplies 34W +12V, +5V 2amp max for each.  One drive is Hitachi and the other Wester Digital.  I've tried every combination of enclosure and drive and one of the power supplies won't work with the Western Digital no matter which enclosure.  Pinning out the voltage on the power supplies are within .01 volt on both the 5 and 12 Volt outputs.  Testing under load conditions the Western Digital peaks up to 15 ish volts before the drive spins up then it drops down to 12.10 Volts.  At the same time the 5 volt starts at about 4.77volts until the drive spins up then rides at 5.1 volts.  With the one suspect power supply the Western digital doesn't spin up so the 12 volt side spikes
up to 15 and stays there and simultaneously the 5 volt hangs around 4.7 volts.  The Hitachi drive works on all power supplies and enclosures.  These power supplies are identical according to the part number etc.  Just curious what other might think is different about the Western Digital drive.  It seems to need a little more umph to spin up.  Is this a marginal Western Digital.  Nothing critical on it, probably still under warranty if I could find the paper work.  Anybody know how strict WD is about warrantying drives?  I sure don't see anything obviously different in the power supply level on start up using the VOM.  I had expected to see one of the power legs drop significantly under load but that's not the case.  Sure seems strange a drive would notice a difference of .1 volts to keep it from spinning up but S#$@ happens.  This is more of an academic question but I'm tempted to return the weaker power supply but I think it's the drive more
than the power supply.  Neither drive is more than 6 months old.  I welcome any speculation from the collective wisdom.

John Moore

Barking Trout Productions

Studio City, CA

bigfish@pacbell.net

[Non-text portions of this message have been removed]

------------------------------------

Please donate to the Red Cross to help those in earthquake ravaged Chile: http://tinyurl.com/y8pgceq

Search the offical complete Avid-L archives at: http://archives.bengrosser.com/avid/

Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Avid-L2/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/Avid-L2/join
(Yahoo! ID required)

<*> To change settings via email:
Avid-L2-digest@yahoogroups.com
Avid-L2-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
Avid-L2-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/