Read Buffer Cdb; Read Buffer Modes Supported; Read Buffer ( 3Ch) - Quantum DLT 4000 Product Manual

DLT4000 SCSI Interface
8 4.

READ BUFFER ( 3Ch)

Byte
READ BUFFER is used in conjunction with WRITE BUFFER as a diagnostic function
for testing the drive's data buffer and the SCSI bus integrity.
Mode
The drive supports the following values within the field. If any nonsupported value is
set, the drive terminates the command with a CHECK CONDITION status and an
ILLEGAL REQUEST sense key set.
Buffer ID & Offset
The drive only supports a single Buffer ID field of zero, and offsetting of data is not
supported. If these fields are nonzero, the drive returns a CHECK CONDITION status
with an ILLEGAL REQUEST sense key set.
-94 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
7 6
0
1 Logical Unit Number
2
3
4
5 Unused
Figure 8-60 READ BUFFER CDB
Mode
000b Combined Header and Data
010b Data
011b Descriptor
Figure 8-61 READ BUFFER Modes Supported
4 3
Operation Code (3Ch)
Reserved
Buffer ID
Reserved
Reserved
Reserved
Description
1 0
Mode
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