Table A-20: Segment Descriptor For Codes 06H And 0Fh - Spectra Logic Spectra S50 User Manual

Stream Device to Discard Operation
Descriptor Code 06h
The segment descriptor format for EXTENDED COPY operation that discards data from a
stream device is shown in Table A-20. This format is required for EXTENDED COPY
descriptor code 06h. The field definitions for the first eight bytes are as defined in
Segment Descriptors on page 93, except for Bytes 6 and 7, which are reserved instead
of having the Destination Target Identifier.

Table A-20: Segment Descriptor for Codes 06h and 0Fh

Bit
Byte 7
0
1
2
3
4 (MSB)
5
6
7
8
9 (MSB)
10
11
12 (MSB)
13
14
15
The Device Transfer Length specifies the amount of data to be read from the source
stream device on each read operation. See Table A-12 on page 92 for information on
how the segment descriptor Device Transfer Length interacts with the Tape Block
Length Parameter of the device specific information.
The Number of Bytes field specifies the number of bytes to be discarded by the stream
device.
Appendix A. Extended Copy—83h—143r1 Specifications
6 5 4
Descriptor Type Code (06h or 0Fh)
Descriptor Length
Source Target Identifier
Device Transfer Length
Number of Bytes
103
3 2
Reserved
Reserved
Reserved
Reserved
Reserved
1 0
(LSB)
(LSB)
(LSB)