Table of Contents
Advertisement
LOG SENSE
Use: An estimate of reading and writing performance can be made by the ratios of 'RAW retries' to 'groups written'
and 'ECC-3 retries' to 'groups read'. An indication of tape degradation can be gained by comparing these ratios for
'current', 'previous' and 'total' entries.
Any attempt to change this page using LOG SELECT will result in a CHECK CONDITION with a Sense Key of
ILLEGAL REQUEST. The current cumulative values will be returned regardless of the Page Control field in the LOG
SENSE CDB.
6.6.7. Tape Capacity Log Page
The tape Capacity Log Page is used to indicate the approximate capacity of the tape currently being used. The PC
field of the LOG SENSE command is ignored for this field.
When the AIT bit is set to ZERO in Mode Sense Page 31h, the 36 bytes of the log page shall be returned.
When the AIT bit is set to ONE, the 1028 bytes of the log page shall be returned.
The 36 bytes of the log page have the following format.
Bit
7
Byte
0
1
2
(MSB)
3
4
(MSB)
5
6
DU (0)
7
8
(MSB)
11
Tape Capacity Log Page Parameters:
Code Value: When AIT bit is set to ZERO in Mode Sense Page 31h
0001
Remaining capacity, partition 0 (kilobytes)
0002
Remaining capacity, partition 1 (kilobytes), For a single partition tape, it will be ZERO.
0003
Maximum capacity, partition 0 (kilobytes)
0004
Maximum capacity, partition 1 (kilobytes). For a single partition tape, it will be ZERO.
Code Value: When AIT bit is set to ONE in Mode Sense Page 31h
0001
Remaining capacity, partition 0 (kilobytes)
0002
Remaining capacity, partition 1 (kilobytes)
0003
Maximum capacity, partition 0 (kilobytes)
0004
Maximum capacity, partition 1 (kilobytes)
0005
Remaining capacity, partition 2 (kilobytes)
0006
Remaining capacity, partition 3 (kilobytes)
0007
Maximum capacity, partition 2 (kilobytes)
0008
Maximum capacity, partition 3 (kilobytes)
007D
Remaining capacity, partition 62 (kilobytes)
007E
Remaining capacity, partition 63 (kilobytes)
007F
Maximum capacity, partition 62 (kilobytes)
0080
Maximum capacity, partition 63 (kilobytes)
SONY AIT-E Turbo drive SDX-250V series Ver.1.0
Table 6-22: Tape Capacity Log Page
6
5
Page Length (00 20h when AIT bit =0
DS (1)
TSD (1)
ETC (0)
Parameter Length (04h)
4
3
Page Code(31h)
Reserved (0)
04 00h when AIT bit =1)
Parameter Code
TMC (11)
Parameter Value
.
.
.
6.Command Specification
2
1
(LSB)
(LSB)
LP (0)
Reserved (0)
(LSB)
6-19
0
Advertisement
Table of Contents
