The ThinkPad W541 has a better storage medium than most many processor core portable PCs that are a comparable age to it. This Lenovo laptop has an SSD storage medium, whereas most laptops that were released around the same time as it have an HDD storage medium. Solid State Drives (SSD) store data in semiconductors on a circuit board rather than using magnetic or optical media. Solid State Drives have no moving parts which makes them very fast and reliable.
An SSD storage medium is in fact the best storage medium amongst all similar spec laptops that have been on the market for around the same time as the ThinkPad W541.
An HDD storage medium is the worst storage medium across similar types of notebook PC.
It may also be worth considering one of the other portable PCs that have an SSD storage media currently available including the NP905S3G, or the NP905S3G both from Samsung which has better reviews.