If I currently have a SATA Hard drive can I replace with a SATA II?

Yes you can, and the connecters are the same.

The good thing with SATA is that it will automatically configure itself. The SATA 2 drive will only run as fast as the SATA 1 controller will allow it to, (1.5gbit/s)

I remove all the jumpers, and the drives auto config themselves. Only use jumpers if using it without causes you any problems.

If you need more info, or want to discuss it further, pop into The Other Place, and also have a look at the info on SATA below

Despite its physical incompatibility with other interfaces, SATA is designed to be backwards and forwards compatible with itself.

The Serial ATA working group will work to ensure that future revisions of the Serial ATA specification do not impact interoperability of future generation equipment with present equipment.

Unfortunately, there are already documented incompatibilities between particular first-generation SATA controllers and second-generation drives. In response, drive manufacturers have equipped SATA/300 drives with a failsafe switch or jumper to force SATA/150 operation !

Yes of course! But if your motherboard does not support SATA ll, your new hard drive will just work as SATA like your former HDD.

yes

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