Making notes here.
I just pulled two drives from my old hp m380n:
Seagate Barracuda 7200.6 160 GBytes Ultra ATA
Model St3160021A
S/N: 3JS21D4J
P/N: 9W2001-030
HDA P/N: 100275532
Config Level: 98MA1
Config Code: D1H-02
Firmware: 3.06
Maxtor DiamondMax Plus 9 160 GB ATA / 133 HD
Mfg. Date 07 Feb 2003
I'm almost certain the Seagate drive was my main C: drive and the Maxtor was K: and L:. Assuming the "2001" in the Seagate part number is the year, that would make the Maxtor the younger drive.
Now to see if this motherboard supports ATA drives. I might have to see if I can find an empty external drive case.