| EIDE (Enhanced Integrated Drive Electronics) | SATA (Serial ATA) | SCSI (Small Computer System Interface) | |
| Feature | The interface of improved IDE. | The interface to replace EIDE. | The interface used primarily by the server. |
| Other name | ATA(Advanced Technology Attachment) PATA(Parallel Advanced Technology Attachment) | ATA-7 | - |
| CPU share | High
* Direct access by the CPU.
| Low | Low |
| Shape | 40/80 pin 5 cm width 40~50 cm length | 7 pin 8 mm width 1 m length | 50/68/80 pin 6~12 m length |
| Disk number | 1~4 | 1~?? | 1~8/64 |
| Hot plugging (Hot swapping) | Generally no | Yes | Yes |
| Speed | ~133 MB/s | SATA 1 : 1.5 Gbps SATA 2 : 3 Gbps SATA 3 : 6 Gbps | SCSI 1 : 5 Mbps Ultra-3 SCSI : 160 Mbps |
| FYI | The speed of the UDMA 6 based interface is 133 MB/s. | The speed of the UDMA 6 based interface is 1.5 Gps. | SAS(SA-SCSI / Serial Attached SCSI) is the upgraded SCSI interface. |