SCSI
The system can support 4 devices.
IDE
up to two
series is newer in ata like series ata and ata the old one is parallel ata
Serial ATA (SATA) the newer and faster standard. Parallel ATA (PATA) provides for up to four devices, including the hard drive. The serial ATA standard allows for more than four drives installed in a system. by: MGVR
Serial ATA are thin cables that don't hinder airflow inside a case as much as the wide parallel ATA cables do.
Four. A master device and a slave device on each PATA chain.
ATA and EIDE These are the most common terms for the same devices, although they are usually incorrect. According to CompTia's Guide to Hardware, ATA refers to drive interface standards as published by ANSI. IDE refers to the technology used internally by the hard drive. EIDE is used by manufacturers to refer to the parallel ATA (P-ATA) that CD drives, DVD drives, Zip drives, tape drives, and IDE hard drives use to connect to the mothermoard. While IDE is used more commonly abroad, EIDE is a more complete and accurate definition.
IDE
Parallel ATA (PATA), often it is incorrectly referred to as IDE (Integrated Drive Electronics)
A parallel ATA connector can use one data cable for two drives.
The cables are smaller and allow for better airflow Because serial ATA cables are thinner, They do not hinder air flow as much as wider parallel ATA cables