I will just copy paste a message i sent to a friend about my query:
[08:28] qaz: this is odd
[08:28] qaz: i can burn a full dvd 4.37 gb in under 5mins
[08:29] qaz: and i can copy 4.37gb of data on the hd from one partition to another in under 5mins
[08:29] qaz: but when i copy my burnt dvd to the hd it takes about 24mins
[08:30] qaz: is that normal?
[08:30] qaz: or is it slowly reading the data off the dvd because it wasnt burnt properly and is hard to read?