Sony PCV-L620 - Manual (Page 54)

VAIO Computer Reference Manual 46
IDE Connectors
There are two IDE (Integrated Drive Electronics) connectors: a Primary
IDE and a Secondary IDE connector.
The Primary IDE connector is a 40-pin 2.54mm pitch header-type
connector for the 3.5 inch hard disk drive.
The Secondary IDE connector is a 50-pin 2mm pitch header-type
connector for the slim notebook-type CD-ROM drive.
OM04701G.VSD
Primary IDE
Secondary IDE