Table B-21: Inline Data To Stream Device Segment Descriptor - Spectra Logic Spectra S50 User Manual

For descriptor type code 0Eh (stream->stream+application client), the copy manager
also will hold a copy of the processed data for delivery to the application client upon
completion of the EXTENDED COPY command in response to a RECEIVE COPY RESULTS command
with RECEIVE DATA service action. If the copy manager supports the 0Eh descriptor type
code it also will support the RECEIVE COPY RESULTS command with RECEIVE DATA service action.
The CAT bit is described in Segment Descriptors on page 133.
The Descriptor Length field will contain 16 (0010h). The Source Target Descriptor
Index and Destination Target Descriptor Index fields are described in Segment
Descriptors on page 133.
The Source Stream Device Transfer Length field specifies the amount of data to be read
from the source stream device on each read operation. See Device Type Specific Target
Descriptor Parameters for Stream Device Types on page 131 for a description of how
data in the Source Stream Device Transfer Length field in the segment descriptor
interacts with data in the Stream Block Length field in the device type specific target
descriptor parameters for the source sequential-access device type.
The Destination Stream Device Transfer Length field specifies the amount of data to be
written to the destination stream device on each write operation. See Device Type
Specific Target Descriptor Parameters for Stream Device Types on page 131 for a
description of how data in the Destination Stream Device Transfer Length field in the
segment descriptor interacts with data in the Stream Block Length field in the device
type specific target descriptor parameters for the destination sequential-access device
type.
The Byte Count field specifies the number of bytes that will be processed for this
segment descriptor. A value of zero will not be considered an error and will indicate
that no source blocks will be read and no source data will be processed. However, any
residual destination data from a previous segment will be written, if possible, to the
destination in whole-block transfers, and any residual data will be handled as
described in Segment Descriptors on page 133.
Inline Data to Stream Device Operation
The segment descriptor format shown in Table B-21 instructs the copy manager to
write inline data from the EXTENDED COPY parameter list to a stream device.

Table B-21: Inline Data to Stream Device Segment Descriptor

Bit
Byte 7
0
1
2 (MSB)
3
Appendix B. Extended Copy—83h—SPC2 Specifications
6 5 4
Descriptor Type Code (04h)
Reserved
Descriptor Length (0010h)
143
3 2 1 0
CAT
(LSB)