What type of 2.5" drive is this, is it ide?

Solution 1:

Judging by the product code MK3021GAS:

Interface Type: DMA/ATA-100 (Ultra)

a.k.a IDE

Solution 2:

Although it is IDE, the edge connector you can see at the top of the drive isn't, it is probably an adapter to a specific computer (or other device).

I suspect its something like this:

http://www.amazon.com/Original-Foxconn-Dell-Drive-Connector/dp/B000MMFPQU

If you wiggle it a bit it will probably come free and show the usual IDE double row of pins below it. Watch you don't bend the pins doing that wiggling, or when putting it back!

Solution 3:

A quick search (Google) usind HDD2181 brought up these specs along with many other sites.

You are correct, it is an IDE drive, specifically an ATA-100 interface.