List of SCSI message codes
This is a list of SCSI message codes.
A SCSI message code is a computer term which defines how SCSI devices send interface management information. The message code comprises one or more bytes.
List of message formats
The first byte of the message determines the format:| Value | Message format |
| 00h | One-byte message |
| 01h | Extended messages |
| 02h-1Fh | One-byte messages |
| 20h-2Fh | Two-byte messages |
| 30h-7Fh | Reserved |
| 80h-FFh | One-byte message |
List of message codes
| Value | Message name | Format |
| 00h | COMMAND COMPLETE | |
| 01h | EXTENDED MESSAGE | 01nnyy... - nn is the length, yy is the [|extended message code] |
| 02h | SAVE DATA POINTER | |
| 03h | RESTORE POINTERS | |
| 04h | DISCONNECT | |
| 05h | INITIATOR DETECTED ERROR | |
| 06h | ABORT | |
| 07h | MESSAGE REJECT | |
| 08h | NO OPERATION | |
| 09h | MESSAGE PARITY ERROR | |
| 0Ah | LINKED COMMAND COMPLETE | |
| 0Bh | LINKED COMMAND COMPLETE | |
| 0Ch | BUS DEVICE RESET | |
| 0Dh | ABORT TAG | |
| 0Eh | CLEAR QUEUE | |
| 0Fh | INITIATE RECOVERY | |
| 10h | RELEASE RECOVERY | |
| 11h | TERMINATE I/O PROCESS | |
| 12h-1Fh | Reserved | |
| 20h | SIMPLE QUEUE TAG | 20nn - where nn is the queue tag |
| 21h | HEAD OF QUEUE TAG | 21nn - where nn is the queue tag |
| 22h | ORDERED QUEUE TAG | 22nn - where nn is the queue tag |
| 23h | IGNORE WIDE RESIDUE | 230i - where i is the number of bytes to ignore |
| 24h-2Fh | Reserved for two-byte messages | |
| 30h-7Fh | Reserved | |
| 80h-FFh | IDENTIFY |