SCSI select key refers to a feature found in Small Computer System Interface (SCSI) technology, which allows multiple devices to be connected and controlled by a single host device, such as a computer. It is a unique identifier that helps the host system differentiate and communicate with each connected SCSI device.
In SCSI technology, multiple devices, such as hard drives, tape drives, or optical drives, can be connected using a daisy-chain or parallel configuration. The SCSI select key is a mechanism that enables the host device to address a specific SCSI device within this configuration.
The select key is typically a binary code consisting of a combination of jumpers, dip switches, or software settings assigned to each SCSI device. By assigning a different select key to each device, the host system can send instructions or data specifically to one device, rather than broadcasting commands to all connected devices.
When the host system needs to access a particular SCSI device, it uses the select key associated with that device to activate a specific communication channel or pathway. This allows the host to send commands, retrieve or store data, and receive status information from the targeted SCSI device.
The SCSI select key is crucial for the proper operation and management of multiple SCSI devices within a system. It ensures accurate and efficient communication between the host device and each individual SCSI device, allowing for simultaneous data transfer and resource sharing.
