User's Manual

DLT4000 SCSI Interface
DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-91
8.4.12 READ (08h)
Bit
7 6 5 4 3 2 1 0
Operation Code (08h)
1 Reserved SILI
2 (MSB)
3 Transfer Length
(LSB)
5 Reserved Flag
Figure 8 57 READ CDB
the drive.
Fixed
or variable-length blocks are to be transferred.
If the Fixed bit is set to zero, a Variable Block mode is requested. A single block is
initiator has allocated for the returned data.
If the Fixed bit is set to one, the Transfer Length specifies the number of blocks to be
in Fixed Block mode.
When the Transfer Length is zero, no data is transferred and the current position on
A successful READ with the Fixed bit set to one transfers (current block
length)×(Transfer Length) bytes of data to the host. Upon termination of READ, the
Suppress Incorrect Length Indicator (SILI)
If the SILI bit is one and the fixed bit is one, the target terminates the command with
additional sense code of INVALID FIELD in CDB.
If the SILI bit is not set and the actual block length is different from the specified
Incorrect Length Indicator (ILI) bit and Valid bit will be set to one. The Sense Key