Edit: I solved this myself. okay let me begin by saying hello and introducing myself then explain what my setup is before i get into my issues and what i tried. hello, i am known as mer2329, if i could change my username i would change it to Overlord_Laharl. i have used many tools to hack many sony systems. i am not a developer. i have hacked my ps2 slim, PSP phat (using GTA: LCS, eventually i used a pandora mod to dual boot multiple different firmwares), my PSP lite (using the soft mod apps) my PS3 using a teensy++ 2.0) and my psvita (and vita tv) using henkaku, then i added adrenaline. i also am a fan of cyanogen mod (and its derivative roms like resurection remix) and have added it to 2 LG g4's and my samsung galaxy tab 3 (original not the slim variant) all on tmobile i am a big fan of viper4android. and consider myself a budding audiophile. now onto my setups my previous setup was a slim ps2 booting with FMCB. i never really used FMCB much so im still a n00b. my current setup a system: Fat PS2 (model: SCPH-39001) accessories: a genuine sony memory card for FCMB (it came form my slim ps2) a memor32 memory card for my saves a gamestar "network adapter" with a sata sonnecter. (it has no network port but the solder pads are there for a SMD ethernet connecter. a brand new Toshiba p300 2 TB drive (https://www.newegg.com/Product/Product.aspx?item=N82E16822149632) a random USB drive to add things to FMCB now my issues. when i use winhiip, my drive is directly attached to my computer using my internal SATA cabling. the drive is detected as having negative GB (i dont know the exact count because im trying to format using HDloader on my PS2 right now) im only offered HD loader 28bit in the format window. (i have 1, 1TB drive that offers me the 48 bit hd loader but thats my c drive). now my attempts. i tried to go through the format process. (it went at about 60 mb/s). and i got a bunch of errors and couldn't select a drive. i wasnt running it as a admin. at this point i set it to run as a run as a administrator by the compatibility settings so it will always run in administrator mode from now on. now i reopen winhiip and select my drive (at this point its fresh from the box) and i go to format it leaving all settigns as default. and get a bunch of other errors. things like not enough space and about 5 others i dont remember. so at this point i try and change my settings, i set full format, application is HDloader 28bit (i was only offered this and toxic OS, but im on FMCB so toxic os wont work for me.) and run the format again and wouldnt even start. at this point i figure i might as well as initilize it on my computer, i did this and tried again. same results. now i format it it into ntfs and try again, error not enough space. next i delete the NTFS particion and try again. progress, it starts the format and runs at about 30 mb/s i run it all night. and it failed @ 100% so i change my SATA cable and try again. its more of the same, -GB, and it fails at 100% at this point i added HD loader 0.8c on my FMCB setup, and added the drive to the PS2 and decided i would try and format it with HDL so i start up HDL and no suprise it was detected as a non formatted drive. so i let HDL do its thing and... fairly quickly i get "fatal error: failed to format HDD" what im going to try next. im going to image my c drive to the 2 tb drive and restore my windows bootloader, then i am going to try and formay the 1 tb drive for my PS2 using winhiip (winhiip detects this drive with the proper capacity and offers me HDL 48bit for this drive. so hopefully it will work) TL;DR: i tried all i could think of to get this drive working but all i am given is errors. so my question is this drive not compatible or am i just missing something. Edit: this is solved. The 1 TB drive i mentioned in my post is working well. With opl and Winhiip.