How many SCSI connector types have?

SCSI (Small Computer System Interface) has several connector types, each associated with different versions and configurations of the standard. Here are the main SCSI connector types:

Parallel SCSI Connectors

1. 50-Pin Centronics:

Usage: Common in SCSI-1 and some SCSI-2 configurations.

Description: A rectangular, 50-pin connector used for early SCSI implementations.

2. 68-Pin High Density (HD68):

Usage: Used in SCSI-2 (especially in LVD configurations), Ultra SCSI, Ultra2 SCSI, Ultra160 SCSI, and Ultra320 SCSI.

Description: A more compact connector with a higher pin count, used for higher-speed SCSI versions.

3. 50-Pin Mini-Centronics:

Usage: Sometimes used in SCSI-2 implementations.

Description: A smaller, more compact version of the Centronics connector with 50 pins.

4. 80-Pin (Centronics) or 68-Pin (D-Sub) High Density:

Usage: Used in some specialized SCSI-3 configurations.

Description: This connector has more pins and is used for certain SCSI-3 devices.

5. 50-Pin Ribbon Cable Connector:

Usage: Seen in older SCSI-1 and some SCSI-2 implementations.

Description: A flat ribbon cable with 50 pins, often used in external SCSI devices.

Serial SCSI Connectors

6. Mini-SAS (SFF-8087, SFF-8088):

Usage: Used in Serial Attached SCSI (SAS) implementations.

Description: Mini-SAS connectors are smaller and support higher-speed data transfers. The SFF-8087 is used for internal connections, while the SFF-8088 is used for external connections.

7. SFF-8644:

Usage: Used in newer SAS implementations.

Description: A more recent Mini-SAS connector designed for external connections, providing even higher performance and capabilities.

8. SFF-8482:

Usage: Often found in SAS environments.

Description: A connector for external SAS connections, supporting high data transfer rates.

Summary of Main SCSI Connectors

1> 50-Pin Centronics

2> 68-Pin High Density (HD68)

3> 50-Pin Mini-Centronics

4> 80-Pin or 68-Pin (D-Sub) High Density

5> Mini-SAS (SFF-8087, SFF-8088, SFF-8644)

6> SFF-8482

Each connector type corresponds to specific SCSI standards and versions, and choosing the right one depends on the hardware and the SCSI version you are working with.

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