User's Manual

DLT4000 SCSI Interface
8-42 DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem
8.4.8.4 Read/Write Compression Ratio Page Format (32h)
The Read/Write Compression Ratio page begins with a 4-byte header followed by the
log parameter blocks of 6 or 8 bytes, depending on the parameter code selected.
Parameter Codes
The following parameter codes are supported for the Read/Write Compression Ratio
page.
Parameter
Code
Description
00h Read Compression Ratio × 100
01h Write Compression Ratio × 100
02h MBytes Transferred to Host
03h Bytes Transferred to Host
04h MBytes Read from Tape
05h Bytes Read from Tape
06h MBytes Transferred from Host
07h Bytes Transferred from Host
08h MBytes Written to Tape
09h Bytes Written to Tape
Figure 8-25 Parameter Codes Supported
Bit
7 6 5 4 3 2 1 0
0 Reserved Page Code
Byte 1 Reserved
2
(MSB)
Additional Length
3
(LSB)
Figure 8-26 Read/Write Compression Ratio Page Header
Additional Length
The additional length field specifies the number of bytes available and depends on the
parameters requested