Okay I installed YDL 3.0 on my second hard disk last night. I chose only to use the drive on my MDD DP 1ghz's ATA66 bus. THis was definately the right drive because it was quoted as being around 80gigs in size whereas my main boot disk is 120 gigs. The install went swiftly and easily, I checked the partition tabels, and it was set to leave the HFS+ partition on the second drive intact and create new partitions for linux. So, when I restarted to boot linux, it went straight to booting the main OS X drive with the big grey apple logo. After about o minute of the spinning thing wiht the apple logo it chages to a big no entry sign, with the spinning thing still going. I've reinstalled OS X on the linux drive, ( which BTW does not work at all as a linux installation, well done YDL,) Started UP, and my other drive does not mount. This drive has all my files, 40gb of songs all my programs, all my music work over the years, thats why I told the Linux installer to specifically leave the drive alone. I think its still there however, because it does try to start up on it, and it can start up half way in single user mode, but it gets stuck after about 20 lines have appeared on the screen. I can only guess that linux screwed up something on the disk but I feel all the data is still there! So waht can I do? I don't give a damn abou getting linux back, I just want my data back! I know I should have backed up, but I used this drive as a backup for the drive I was installing linux on, thats why i didn't Use it for installation. One thing to note, journalling was enabled in this drive. AN dI had just installed 10.2.6 before trying out the linux installer.