Ignore Wide Residue (23H) - Sony DDS-4 Product Description Manual

5. SCSI INTERFACE

5. 3. 12 IGNORE WIDE RESIDUE (23h)

The IGNORE WIDE RESIDUE message (see table 5-5) shall be sent from the SDT-10000/SDT-11000 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 negotiate transfer width. The ignore field indicates the number of invalid data bytes transferred. This
message shall be sent immediately following that DATA IN phase and prior to any other massages. The ignore field is
defined in table 5-6. More than one IGNORE WIDE RESIDUE message may occur during an I/O process..
Even though a byte is invalid its corresponding parity bit shall be valid for the value transferred.
Byte Value
0 23
1 01
Table 5-5: Ignore Wide Residue Message
Invalid data bits
Ignore
00h
01h
02-FFh
Table 5-6: Ignore Field
SONY SDT-10000/SDT-11000 DDS Tape Drive
Message Code
Ignore
16-bit transfers
Reserved
DB (15-8)
Reserved
5 - 11