Do you have the iMedia B2218? That's the only iMedia I saw with a 160GB hard drive and 1GB of RAM, anyway.
That model, as well as all other iMedia models shown on PB's web site use SATA drives, so you should be good. If you want to be sure, open up the case and have a look. SATA cables are small, about 3/8" wide (I'm in the US and we use inches
). PATA/ATA/IDE cables are wide and flat, about 2.5-3" wide. The power connector for a SATA drive is small and flat, while a IDE drive uses a molex connector.
SATA II is completely backwards compatible with SATA I connectors. The maximum theorectical throughput is different, but even SATA I drives do not fully saturate the bandwidth available to them.