Small Computer System Interface (SCSI) adapters connect devices with different SCSI configurations to computers or other SCSI devices. They may include one male and one female connector, or have similar connector types on both ends. They can also interconnect different wire configurations, such as 50-wire to 68-wire. Some operating systems require drivers to work with SCSI adapters.
Types of SCSI Adapters
Kinds of SCSI Adapters include the following:
Single-ended (SE) SCSI adapters
SE adapters can support three meters of electrical cable at a 10 megabyte per second (MBps) transfer rate.
They can connect up to two drives or one optical library with two drives.
They cannot connect a library and stand-alone drive on a single bus.
Low-voltage differential (LVD) SCSI adapters
LVD adapters can support a maximum length of 12 meters at typical transfer rates.
They can be connected to devices with single-ended adapters.
They require less voltage and have excellent noise immunity.
High-voltage differential (HVD) SCSI adapters
HVD adapters can support up to 25 meters of cable, but they cannot connect to SE and LVD devices.
They require specific differential cables, devices, and terminators.
Choosing SCSI Adapters (Buying tips)
Auto switch: Choose an SCSI adapter that allows you to switch between different interfaces for different applications. For light to general use, look for an auto switch between SE and LVD. Operating system support: Make sure the SCSI adapter is supported by your operating system. Some systems have compatibility issues with five-volt PCI adapters. Choose an adapter that provides device driver support for compatibility.
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