Legacy Storage Connections: PATA (Parallel ATA) 💾

Introduction to PATA

• PATA: Parallel AT Attachment, also known as Parallel ATA / ATA.
• Originally named IDE (Integrated Drive Electronics) by Western Digital.
• Enhanced version known as EIDE (Enhanced IDE).

Historical Context

• AT Attachment: Derived from IBM's original PC-AT.
• Used to connect drives within early systems.
• Speeds range from 16 MB/s to 133 MB/s.

Types of Devices

• Not just hard drives but also CD-ROMs and DVD-ROMs can use PATA.
• Refers to ATA Drive or IDE Connection in older motherboards.

PATA Cables

• Two types:
  • 40-wire PATA cable
  • 80-wire PATA cable
• Both have a 40-pin connector for the motherboard & two 40-pin connectors later on the ribbon cable.
• Device 0 and Device 1:
  • On 40-wire: Device 0 is first, Device 1 is at the end.
  • On 80-wire: Device 1 is first, Device 0 is at the end.
• Minimizing Crosstalk: 80-wire cable reduces crosstalk for higher speeds.
• Visual difference: 80-wire has double the number of wires than 40-wire.

PATA Connectors

• Size: PATA connectors are large compared to SATA connectors.
• Pin Configuration:
  • 40-pin symmetrical connector.
  • Missing pin to help proper orientation.
  • Notch at the bottom aids in correct alignment.
• Identical connector for both storage device and motherboard.

Transition to Newer Technologies

• PATA is a legacy technology, not common in new systems.
• SATA data cable:
  • Much smaller than PATA ribbon cables.
  • Takes up less space inside systems.