Western Digital Hard Drive Platter Sizes

Good morning. I am in need of clarification on how many platters each of the western digital drive models below contains. I've been unable to locate the information on the WD website or via google searches. Most of the information I've found is contradictive, as some sites say one thing and others say another. Any platter information for any of the models below would be greatly sppreciated; particularly the desktop models and velociraptors. Thanks in advance!

UPDATE 10/9/08 @ 1pm EST: According to Western Digital pre-sales support, all current drives of theirs being manufactured follow a general guideline:

40GB - 320GB = 1 platter
400GB - 640GB = 2 platters
750GB - 1TB = 3 platters

The raptors from what I understand use 150GB platters however. I thought I'd mention this for anyone else who is curious about this, as I thought they had 4 platter models such as the TB drives but they said those are 3 platters now.


Desktop Models:

WD5000AACS
WD6400AACS
WD7500AACS
WD10EACS
WD10EADS

WD1600AAJS

WD2500AAKS
WD3200AAKS
WD4000AAKS
WD5000AAKS
WD6400AAKS
WD7500AAKS

WD5001AALS
WD6401AALS
WD7501AALS
WD1001FALS


Enterprise Models:

WD5000ABPS
WD7500AYPS
WD1000FYPS

WD1601ABYS
WD3201ABYS
WD4001ABYS
WD5001ABYS
WD7500AYYS

WD2502ABYS
WD3202ABYS
WD5002ABYS
WD7502ABYS
WD1002FBYS

WD1500HLFS
WD3000HLFS
WD3000GLFS



-- MaSoP

It is for personal and business reasons. I keep a spreadsheet current with the proper specs as well as pricing for myself and for potential system builds. I'll try contacting them, though seeing that the web site is empty of any useful information, there must be a reason why they are deliberately excluding that particular specification. Strange if you ask me. Thanks for the reply. :-)

-- MaSoP

UPDATE: I have been unable to find a support # that doesn't require a serial # or a fee for support. I suppose I will have to send an email. Hopefully I will get the information I need that way, though it could take forever.