WD claviar - the number of platters

Hello everybody,

I am a bit disappointed about the support that is privided by WD at this website. I am buying  WD3200AAJS 8MB cache RPM7200

I can’t find info on this product. The thing I wanna konw is hom many platters does is have:womanmad:

At online-shops  at one time they say 2 another time they say 3 platters. I have come here at WD website and I can’t find info on this DRIVE!! 

As far as I know the fewer platters, the better - I mean a disc is less likely to break down, is more quite. Now I am wondering if it is worht buying if it has more than 1 platter! WHat do you think? Are discs with 2-3 platters worth buying?

Can anybody please tell me how many platters does this drive have?  

whats the full model number?

Caviar blue a single platter, single head.

FWIW, the following HD Tune benchmarks show single-platter, two-head drives:


That said, the above may be older versions. HDDRS may be aware of differences in current models. Current technology is at 1TB per platter (ie 500GB per head), so a single-head drive is quite feasible. One way to tell would be by the transfer rate. A maximum sustained data transfer rate of 180MB/s would be what you would expect of a non-Advanced Format version of such a drive.

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Thanks, but I don’t understand those pictures. Do they show well?

Isn’t it strange that we can’t find info on a drive at a manufacturer’s website? As for me, it is a must! They provide everything, but not what people want to know… I used to have seagate once, they provided a better website. You could find what you wanted… and even wright an e-mail to a support team. Simple! 

I dont have the drive yet. It has been sent and I am awaiting it. I thount all the details were sufficient. Weren’t they? All I know about the drive is:  WD Caviar SATA II 320GB/8MB/7200RPM   Model WD3200AAJS

So you say this drive is one-plattered? Right? If it is one-plattered there can only be two heads. Right? 


I am using OPERA and formatting buttons don’t work… terrific, just great :slight_smile:

To answer your questions, your drive undoubtedly will have a single platter, and a single plattered drive can have either one or two heads, at least with current technology. Platter densities are currently at 1TB per platter (500GB per surface), so your drive could just as easily be built with 1 head as with 2.

For example, here is the performance graph for a 500GB drive with a single 1TB platter and a single head:

Here is the graph of a 500GB drive with a single 500GB platter and two heads:

Notice the big difference in the data transfer rates, 180MB/s (max) versus 127MB/s (max).

Similarly, if your drive has a single head (as suggested by HDDRS), rather than two heads (as suggested by the graphs I have found), then you would expect that it would have a much higher transfer rate than any of my examples.

BTW, I share your concern regarding the lack of adequate technical documentation on WD’s web site. It’s next to useless. What little documentation exists is mostly marketing pap, eg stuff like “IntelliPower is a fine-tuned balance of spin speed, transfer rate and caching algorithms blah blah blah”.

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