Multiple choice technology operating systems

A SCSI Device has disconnected from SCSI bus, because it is seeking some data for I/O request. Now it wants to access the SCSI bus again. Which phase the bus is in:

  1. Bus Free

  2. Selection

  3. Message In

  4. Reselection
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When a SCSI target device disconnects from the bus during an I/O operation (commonly to seek data), it must use the Reselection phase to regain control and complete the transaction. The target initiates reselection to resume communication with the initiator. Bus Free indicates no device ownership, Selection is for initial target choice, and Message In handles status transmission.

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