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Messages

4-8 Quantum DLT 8000 Tape System

4.2.6 IGNORE WIDE RESIDUE Message (23h)

The IGNORE WIDE RESIDUE message is sent by the target to the initiator to indicate

that the number of valid bytes sent during the last REQ/ACK handshake and

REQB/ACKB handshake of a DATA IN phase is less than the negotiated transfer width.

The Ignore field indicates the number of invalid data bytes transferred. This message is

sent immediately following that DATA IN phase and prior to any other messages. Figure

4-3 illustrates the data format of an IGNORE WIDE RESIDUE message. Table 4-6

describes the Ignore field bit definitions.

Bit

Byte

7 6 5 4 3 2 1 0

0 Message Code (23h)

1 Ignore (01h)

Figure 4–3 IGNORE WIDE RESIDUE Message — Data Format

Table 4–6 IGNORE WIDE RESIDUE Message — Field Definition

Ignore Invalid Data Bits

16-bit Transfers

00h Reserved

01h DB(15-8)

02h - FFh Reserved

1 2 ... 133 134 135 136 137 138 139 140 141 142 143 ... 407 408

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