Hard Drive Cache size confirmation

How can you determine whether a SATA 3.5 disk has its advertised cache?
Seagate ST3750528AS with 32mb advertised cache.

Using a program such as "DiskCheck" shows this disk to have 0 buffers; whereas
my Seagate ST320620AS shows that it has its advertised 16mb buffers.
Is the program not reporting correctly or is the cache acually missing?

I am trying to utilize a free program since it makes little sense to spend $35
for a one time use just to confirm the presence of a vendor cache advertisement.
The 750GB is installed as a 2nd internal disk on a XP Pro SP3 desktop.

Any help is appreciated. So far, no response from Seagate.

Update:
Response from Seagate is that the reporting facility on the drive is disabled from the factory so the reporting of 0 does not indicate the cache is nor working. If the drive passes their utility testing, then the cache is working correctly.
Case closed.

 

Crystal Disk Info
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