hi, my new imac, which i've only had for about 5 months, is always needing disk repair. i find it running a bit sluggish sometimes, so i go onto disk utility and run verify disk. it then lets me know that it needs disk repairing. why is it always needing this? it is pretty annoying since my 2008 macbook doesn't do this much. my macbook usually needs a disk repair every few months, possibly 1 time a month if not at all. today i used the techtool deluxe, and apperantly the video ram failed the test. what is wrong with this imac?