Great tutorial! By way of thanks I thought Id add an account of my experiences upgrading my HDD in the hope that maybe itll help someone else.
Software:Hddhackr 0.91
Hddss.bin (seemingly from a FUJITSU MHW2120BH)
Hex Workshop (6.01)
Xplorer360 Extreme 2 build
Windows Vista Ultimate
I didnt use any of the other software listed at the start of the tutorial.
Hardware:WD1200BEVS drive (model WD1200BEVS-00UST0)
PC using ASUS A8N-E (nForce4 Ultra chipset)
Xbox Arcade (Falcon chipset)
The boot disk I used I just created by formatting a floppy through Windows and checking the
Create an MS-DOS startup disk option.
Steps 1-4: Since I was using a PC with an nForce4 Ultra chipset (evidently not supported by hddhackr auto-detection), when I came to flash the WD drive it was not auto-detected. I followed the instructions on how to edit hddhackr.com (using Hex Workshop) from the hddhackr readme.txt (the values for my PC were 09 70 09 e0) and retried. It failed again but I realised that Id edited hddhackr.com to use ports 3 or 4 but the drive was attached to port 1. I attached the drive to port 3 and retried and this time it worked.
Steps 5-7: I set it formatting on the Xbox 360.
Steps 8-12: I connected the old 20GB drive to my PC. Using Xplorer360 Extreme 2 I copied the contents of partition 3 to my PC (I didnt clear the cache beforehand) and backed up partition 2 to a .bin file (a 256MB file in my case). Copying the contents of partition 3 was a bit of a pain because of repeated errors and having to kill the app but I ploughed on and got it all copied. I then skipped all the hex editing stuff gambling that the Extreme 2 version of Xplorer360 would work without it it did.
Step 19: I connected the now formatted 120GB drive to my PC and opened it with Xplorer360 Extreme 2.
Step 20: Unfortunately, I couldnt expand Partition 3 because there wasnt one all I had was partition 1. So I decided to skip to step 21 and come back to the copying.
Step 21: I restored partition 2 after which partition 1 had disappeared and partitions 2 and 3 had appeared.
Step 20 revisited: Now equipped with a partition 3 I went back to step 20 and copied the data backed-up in step 10 to it.
I then fitted the 120GB HDD into the Xbox 360 HDD enclosure and attached to the Xbox to do some tests. I dont have a great deal of downloaded content but the few game videos I have work OK. I then tried the following games:
Guitar Hero II
Guitar Hero III
Guitar Hero World Tour
Rock Band
Gears of War
Fable II
Mirrors Edge
Of these, all worked OK apart from Rock Band and Fable II as expected and I can confirm that the method of moving their savegames to a MU and back worked OK.
All done now and working fine,
Thanks again to hobartrus, TheSpecialist et al.