I am not very conversant with all the electronic hardware. I wanted to upgrade hard disk for my laptop (Compaq Presario R3310US, 3 yr old). The original disk it came with was Hitachi
DK23FA-60 60GB, which I found on the net to be listed as ATA-6. So I ordered "Western Digital Scorpio WD1600BEVE 160GB 5400 RPM ATA-6 Notebook Hard Drive" from newegg.com. But it
turned out that the interface is totally different. Please see the images below the text to see how the hard disk interface on my laptop, as well as the interfaces on the old and new hard disks. I requested an RMA from the vendor as the hard disk is incompatible.
Please help me with:
How do I select a new hard disk to fit the interface on my laptop? Was I wrong to specify the interface as ATA-6?
Did the vendor send me a hard disk with pin interface different from ATA-6? In that case I can take this case up with the vendor.
Thanks.
Images:
Hard disk goes here:


Original Hard disk:

New hard disk:


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