Specs for Dell Latitude E6410 HDD - which SATA disk to buy ?

I'd like some advice about which SATA disk to buy for a Dell Latitude E6410. It would be used on the eSATA port of this machine. I'm going to buy w/o caddy/case so it can bought as internal. I have lead for connecting from eSATA port to a SATA HDD.

My problem is this (at the moment). There seemsto be three SATA specs, SATA, SATA II and SATA III, which to get for this PC ? And there are three transfer speeds, 1.5, 3 or 6 Gb/s, and don't what's compatible with the laptop. It's not clear from the PC (I looked in the BIOS and that didn't give any info on the internal HD aside from its size).

Ignorantly,
Dumb_Question
18.October.2011

Old PC -> Compaq Presario S5160UK DT261A (2.7GHz Celeron) - MSI MS-6577 v2.1 - XP/SP3

 

To my knowledge they are backward compatable so get a SATA3 6gb/s drive. if your system is ony SATA2 it will still work but at the slower speeds

 

Look in wickipedia for moe explanation- Your laptopwill most likely work in sata 11, but asTeur says, the sata3 will be backwards compatable. Be careful if just using a lead without an enclosure, as you can easily kill the hard drive with static, in time, unles it is in some sort of csddy, or docking station.
If you note with the wickopedia page, thedifference in voltage (+5 for laptops/12v for pc).
Quite honestly with my power supply and cable it has not given me a prlem, but I only use it for repairing, or, geek work, and note that if not protected with a caddy, or, dock, then do not touch the hard drive without antistatic precautions within about 15-30 seconds , as the hard drive can be damaged.I assume you have a seperate power suply for the sata drive ?

 

Any current SATA 2.5" drive should work.

Personally, I've had the best luck with Western Digital's Scorpio Black series: 7200 RPM and a lower failure rate than other drives in this price range.

http://www.directron.com/wd2500bekt.html

(lower price than Newegg, plus a vendor I use often and trust)

Hope this helps.