[benz]

hi, my external US hard drive is dead and likely from my fault, i had ~80G data in my 160 USB extrenal HD and works perfectly well before till i plan to change the ownership and permission of that external HD with intention of increased security.......
i go to the info. window of the disk, and also open "ownership and permission" then i can't remember what i had clicked , lastly may be clickng "all enclosed items", some error message turn up ,followd by disappearance of the disk image and just can't seen the disk and all files. tried disk utility and check the disk, well, it repaired and final pass the verificaton, but just can't verify /repair the permission from disk utility, and disk utility shows no file in the disk !!!!
after ejecting the disk by utility and remount again , just can't see the disk image, it evaporates completely !!!!
what can i do? and any repair modality greatly appreciated ,
thanks a lot

[Twinkie]

So I'm not to sure if this will work, but it's something that I would try. I don't know if it will help or hinder your problems in this situation, hopefully someone will come along and tell you to go for it or tell you not to, but I would boot into single user mode and run fsck on your external drive and try to repair it like that. Run fsck_hfs -l in terminal on the disk and see what those results are and then go from there.

Another alternative you could do if you don't mind paying is just get Data Rescue II and try to recover the data onto your internal and then reformat the external drive.

I don't know if I helped or not but I tried what I knew to help.

[benz]

thanks a lot for your advice, i did try the demo. version of "data rescue II", and seems work, so buy it and the issue settled

thanks again