Messages
Message Out
Table 112. Supported Outbound Messages
Name | Code | Support |
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Abort | 06h | An abort condition is generated (see “Abort Handling” on |
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| page 94). |
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Bus Device Reset | 0Ch | A reset condition is generated (see “Abort Handling” on |
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| page 94). |
|
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|
Extended Message | 01h | See “Unit Attention Conditions” on page 87 for extended |
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| message support. |
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|
Identify | 80h+ | The Identify Out message is sent by the initiator to identify |
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| the Logical Unit to be accessed and to set Disconnect |
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| Privilege. The LUNTAR flag must be 0. The Identify Out |
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| message must be sent as the first thing after selection. If it |
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| is sent at any other time, the drive responds with a |
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| Message Reject message and goes to Bus Free. |
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|
|
Initiator Detected | 05h | The initiator has detected an error in the data being sent |
Error |
| in a Message Command, Data, or Status phase. The drive |
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| retries the data burst or message (see “Bus Parity Errors” |
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| on page 97). If the message is received immediately after |
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| an Identify message or after the Command Complete |
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| message has been sent, the drive goes to Bus Free. |
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|
|
Message Parity Error | 09h | The initiator has detected a parity error in a message. The |
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| drive retries the message (see “Bus Parity Errors” on page |
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| 97). If the message is received during a Command, Data, |
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| or Status phase, immediately after an Identify message, or |
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| after the Command Complete message has been sent, the |
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| drive goes to Bus Free. |
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|
|
Message Reject | 07h | This message is sent when the initiator does not support a |
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| message sent by the drive or considers the message |
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| inappropriate. If the message being rejected is Disconnect, |
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| Synchronous Data Transfer Request, or Wide Data |
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| Transfer Request, the operation continues without those |
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| features. For all other messages except Restore Pointers, |
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| the message is treated as an Abort message. If the |
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| message is received during a Command, Data, or Status |
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| phase, immediately after an Identify message, or after the |
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| Command Complete message has been sent, the drive |
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| goes to Bus Free. |
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|
No Operation | 08h | This message has no effect and is ignored. |
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98Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference
