User's Manual

DLT4000 SCSI Interface
8-120 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
8.4.22 SPACE (11h)
Bit
7 6 5 4 3 2 1 0
0 Operation Code (11h)
1 Logical Unit Number Reserved Code
2 (MSB)
Byte 3 Count
4 (LSB)
5 Unused Reserved Flag Link
Figure 8-75 SPACE CDB
SPACE provides a variety of positioning functions that are determined by Code and
Count fields in the Command Descriptor Block. Both forward (toward EOM/P) and
reverse (toward BOM/P) positioning are provided.
Code
The code is defined as follows:
Space Code Space by:
000b Blocks
001b Filemarks
010b Sequential Filemarks
011b End-of-Data
Figure 8-76 SPACE Code Definition
For 2.6 and 6.0 GB format, the drive supports count values 0, 1, and 2 only. For 10.0
GB format, compress or noncompress, the count value can be from 0 to FFFFFFh.