How many SCSI cable types have?

SCSI cables and connectors have evolved significantly over the years, and they come in several types, each associated with different versions and functionalities of the SCSI standard. Here's a summary of the main SCSI cable types:

Parallel SCSI

1. SCSI-1:

Connector: 50-pin Centronics

Cable: Often referred to as a "SCSI-1 cable," typically used for the original SCSI standard with speeds up to 5 MB/s.

2. SCSI-2:

Connector: 50-pin Centronics for single-ended (SE), 68-pin High Density (HD68) for differential (LVD) versions.

Cable: Cables come in both 50-pin and 68-pin configurations, supporting speeds up to 10 MB/s for SE and 20 MB/s for LVD.

3. Ultra SCSI:

Connector: 68-pin HD68

Cable: Ultra SCSI cables support speeds up to 20 MB/s.

4. Ultra2 SCSI:

Connector: 68-pin HD68

Cable: Ultra2 SCSI cables support speeds up to 80 MB/s.

5. Ultra160 SCSI:

Connector: 68-pin HD68

Cable: Ultra160 SCSI cables support speeds up to 160 MB/s.

6. Ultra320 SCSI:

Connector: 68-pin HD68

Cable: Ultra320 SCSI cables support speeds up to 320 MB/s.

Serial SCSI

7. Serial Attached SCSI (SAS):

Connector: Various, including 4x Mini-SAS (SFF-8087), 8x Mini-SAS (SFF-8088), and newer versions like SFF-8644.

Cable: SAS cables are used for high-speed data transfer in modern SCSI systems, supporting speeds up to 600 MB/s per channel.

Mini-SAS

8. Mini-SAS:

Connector: Mini-SAS (SFF-8087, SFF-8088)

Cable: Mini-SAS cables are used for internal and external connections in SAS environments, supporting high speeds and multiple channels.

In summary, the main types of SCSI cables are:

50-pin Centronics (SCSI-1)

68-pin HD68 (SCSI-2, Ultra, Ultra2, Ultra160, Ultra320)

Mini-SAS (SAS, SFF-8087, SFF-8088)

Each type of cable is designed to match the specific SCSI standard and connector type used in the hardware it supports.

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