So.
I’m working on repairing a co-worker’s laptop. Seems he ran a disk utility to defragment the drive, and it didn’t update the catalog file correctly. Part of the OS got overwritten. Then the catalog file got overwritten. This is a bad thing.
Normally, I’d do up a post at this point warning folks off and recommending against that particular software. Unfortunately, he doesn’t remember the name of the utility, apart from it being “Disk Something”.
So here’s my warning to you all: If you find a program called “Disk Something”, DON’T USE IT. It will eat your hard drive.