Alrighty...
I have 3 external Western Digital media center hard drives.
These have twin USB 2 ports and a single Firewire port for connections.
They are hooked up to a Dell Inspiron 6000 notebook, which has
(4) USB 2 slots and one mini FW port.
The drives are typically set up one on FW and the others on USB.
The first one I purchased some time ago and is a 160 GB unit.
Typically that's the FW drive, but I've switched it back and forth to USB
due to moving things around lately. Noticed no performance issues.
Since picking it up it's ran just fine. It's a WD1600B011.
The other two drives are July '06 units, 320 GB ea. Same style/model group and it
would appear software, other than the company logo's been updated on the housing.
Both are WD3200B011's.
Now to the problem -
Up until this last week, I've had one 320 and the 160 hooked up only.
The 320 is just one big partition, the 160 is in three parts.
Since about January the 320 has been giving me problems such as...
Odd shut down/start up pattern (not the usual).
It will sometimes constantly sit and run/click/spin or act like it is seeking data - which
often will cause the computer and any applications (even those unrelated to that drive) to slow down or freeze.
Even when hooked up, it will arbitrarily disconnect itself and disappear from My Computer.
Sometimes when starting the computer - it will not show up; to fix this and the previous
issue you have to cycle the drive's power.
Sometimes you can't even get it to turn back on with the power button after one of these "episodes"
it has to have the power cord removed then reinserted... then it will fire up.
So I've pretty much resolved myself to turning it in to WD support and getting a new one.
Now, besides that - I of course have to get my data off it - so I'm trying to use the second 320 as the backup.
Being that I need to make a backup of the 160 GB drive too - I figured that I would partition this backup drive 4 ways.
After trying a pair of programs off the net to partition it, which either couldn't do anything at all or they would
only partition a 49 GB section... I finally went and got Partition Magic 8 Portable.
When I went to make the 2nd of the 4 partitions - it came up with an error in the creation process and left me
with unallocated space. Doing the process one at a time manually finished the creation of the 4 partitions successfully.
Which for reference are 155, 100, 37, 18 GB.
Now after getting it set up, the drive is starting to exhibit similar symptoms to the other 320 unit...
Frequent running/noises and slowing/freezing Windows XP at times until the drive is turned off.
(In fact, right now the second unit sounds like it's spun up and makes a hard click about every 9 seconds.
The original 320 has a noticeable whir, but not uncommon for a multiplatter drive. The 160 GB unit
is basically dead silent and almost no spin vibration to it at all.)
The original 160 GB unit still is running strong and has yet to give me problems, but I don't feel that
it's wise to make this backup if the "backup unit" is already getting irritable and there's not a single file on
it yet. I've ran 2-3 versions of WD's drive recovery diagnostic/support inspection tool... it can't find anything wrong on any
of the drives. I've switched between Firewire and USB to see if that had any effect on the problem - nothing.
The drivers are up to date as far as I can tell for both the PC and the drives. All the drives are plugged into the same
power strip, so it's not "dirty" power causing fluctuations.
So I'm pretty much at my wit's end with these things,

I know my way around a PC's organs - but
this is getting beyond me. The only common factor seems to be the software and model of the two new units.
I've scanned with 4 sets of antivirus/spyware tools - to make sure I don't have a single piece of oddball
software or a virus causing this...
So any ideas? I'm fresh out.