SCSI Contingent Allegiance Condition refers to a specific state or condition that may occur in a Small Computer System Interface (SCSI) environment. SCSI is a widely used interface for connecting peripheral devices such as hard drives, tape drives, and scanners to a computer.
Contingent Allegiance Condition (CAC) is a mechanism within SCSI that allows devices to communicate and negotiate certain conditions during the data transfer process. It typically arises when a SCSI initiator (e.g., a host adapter) encounters a condition requiring input or acknowledgment from the target device.
In this context, SCSI Contingent Allegiance Condition is a state where the target device is awaiting further instructions or information from the initiator before proceeding with data transfer. For instance, it may arise when the target device needs additional data or configuration information from the initiator to complete a command execution.
When a SCSI Contingent Allegiance Condition occurs, the target device temporarily suspends its processing until it receives the necessary information from the initiating device or until a timeout occurs. It allows for synchronization between the initiator and target device, preventing data corruption or loss due to mismatched expectations or incomplete commands.
To resolve a SCSI Contingent Allegiance Condition, the initiator typically sends the required information or acknowledges the condition. Once the target device receives the necessary input, it continues processing the command and initiates the data transfer accordingly.
Overall, the SCSI Contingent Allegiance Condition is an essential mechanism in SCSI communication that ensures proper coordination, synchronization, and error prevention between initiator and target devices during data transfer operations.
