Hard drive upgrade problem with my Archos Studo 20

[strycer]

I am trying to upgrade the Hitachi harddrive in my Archos Studio 20, to a Western Digital WE1200VE.  I have upgraded in the past to a 60 gig Toshiba harddrive without problems, but the drive failed after I accidentally dropped my jukebox, I must have crashed the heads for something, I put the original hard drive back in the AJS20, and everything came right back up without issue.  This time when I swapped drives, and power up the ajs20, the drive spins up, the display says that the drive is empty, when its loaded with about 30 gigs of music.  When I hook the ajs20 to the USB port the computer sees the whole drive.  I also tried the process to make 160gig drives work, that didn't work either.  Does anybody have any ideas?
Thanks,
Tom

[jusbv]

Read wiki page http://www.rockbox.org/twiki/bin/view/Main/BigDisk
To make it work you have to make two partition with non archos disk adaptater. One 128go and one 24go...Copy your music one the small one after you can acces it only from rockbox.
To see the two partition on rockbox you have to use special LB48 firmware wich is on wiki.
http://forums.rockbox.org/index.php?topic=7788.0

[strycer]

Intially I tried to reduce the partition size to 60 gigs, but that didn't work as I doing the process through the USB port on the AJS20. I then resized it again outside the AJS20, reduced the first partition to 20 gigs and the second partition to the remainder of the drive.   Reinstalled it in the AJS20, and got the same result.  "Drive Empty"  Any other ideas, other than this drive is not compadable with the AJS20?
Thanks,
Tom

[jusbv]

Make two Primary partition LBA48 with one of 127GiB. Paragon works.
Copy  on your little one. Download the LB48 firmware on Docs.

[strycer]

127go = 127gigs?

Both partititions are primary partitions, I am going to low level format the drive and download paragon, and try creating the partition with that instead of partition magic.

[jusbv]

It's 137Go, so about 128Gib. Make sure your partition are LBA48 and you're firmware is LBA48 too. You should have the big one without the special firmware. To test it in your archos don't reassemble all of it. It doesn't work the first time.
Two Primary LBA48 (0x0C) FAT32 partitions with paragon should works.
Wiki says to put the small at 0x1C, same but hidden because hardware limitations make some errors to copy.