Yes the adaptor will. The HDD usage is not dependent on network setup.
Originally Posted by ixitwistedixi
All Sony (or compatible clone) network adaptors should plug into the back of the PS2, with IDE connectors 'pointing' into the drive bay at the bottom of the PS2 and with a special connector mating with the one above the drive bay. (Once you open the 'back door' of your PS2 you'll see what I mean.) All such adaptors will support an HDD (unless broken).
Do all the network adapters support HDD?
The one with a 56K modem connection was only sold in the US I think, and only for a limited period I think. Apart from that connector they are mutually compatible.
Ive done some searches and there seem to be only 2 versions of the adapter that i can find, one with the 56K Connection and The 10/100 Connection (the one i have) and One with just the 10/100 Connection (im assuming to be a newer version that what ive got)
Yes, they do.
But in the pictures they all say HDD, im assuming all versions of the adapter support HDD?
No. The original setup disc is only relevant to networking.
If that is the case, wouldn't the original setup disc also setup the HDD function?
There is nothing to enable. All you need do to gain physical access to an HDD is to connect it.
Or if the Network Settings have been setup, does that automatically enable the HDD settings?
Getting software access is another story, as a stock PS2 has no software whatever installed for using an HDD. But homebrews and some commercial utilities can do so without problems.
Most people prefer to format the HDD either in HDLoader or in uLaunchELF or connecting the HDD to a PC and format it for PS2 with WinHiip. The latter is a good idea if you also plan to install many games for HDLoader in the same session. Once you have the drive formatted and mounted properly in the PS2, you can use it with most modern homebrews and even with a few commercial tools. (eg: HDAdvance, CodeBreaker)
Best regards: dlanor