For your information. Almost all mainboards has PATA IDE
interface. Without an PATA IDE interface, you cannot even install
your internal cd-rom or dvd-rom drives.
PATA = Parallel Advance Technology Attachment
SATA = Serial Advance Technology Attachment
HDD = Hard Disk Drive
Next, you can have both PATA HDD and SATA HDD installed in your
system. My current system has two SATA HDDs and one IDE HDD.
In terms of pefromance, SATA HDDs are slightly faster than the PATA
ones.
In terms of installation, it is much easier to plug and unplug the
SATA cables than PATA cables.
Basically, there is no reason to use PATA HDD anymore unless your
mainboard cannot support SATA HDD.