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- SCSI commands pass data in one direction only. If you want to send some
data and then receive some data, you need to use two separate SCSI
- Some common SCSI commands: READ, WRITE, Send Diagnostics, Receive
Diagnostics, Inquiry, Test Unit Ready.
- Each command returns a status code. A special code named 'mode sense'
means there is an extra 'sense data' to be received, which contains
an explanation for the cause of the problem.
- In order to allow a pipeline of commands, it is possible to attach a tag
to a command. The tag is a single byte, so at most 255 commands may be