Ya laptops are slow to save battery

.
The time it takes depends on the speed of the drives, the files you are AV, and the amount of free space.
EX:
I have an 2x 80 gigs in 1 system non-raid on a desktop.
1 with 3-5 meg mp3's @ 70 gigs. (15-20,000 files)
1 with 1k-200k gif,jpg,xml, php files @ 40 gigs (300-500k files)
It will take 30 min for the MP3 drive and 4-5 hours on the other.