Quantum 10K II - Manual (Page 118)

SCSI Description
Quantum Atlas 10K II Ultra160/m SCSI Hard Disk Drives 5–51
5.12 LOG SELECT Command (4Ch)
The drive collects and stores performance data and error summaries in counters. The
LOG SELECT command is used to zero these counters. The LOG SELECT
command is a complementary command to the LOG SENSE command
Bit
Byte
7 6 5 4 3 2 1 0
0 Operation Code (4Ch)
1 Reserved PCR SP
2 PC Reserved
3 – 6 Reserved
7 – 8 Parameter List Length
9 Control
Figure 5–20 LOG SELECT Command Descriptor Block — Data Format
Table 5–20 LOG SELECT Command Descriptor Block — Field Descriptions
Field Description
PCR Parameter Code Reset. Must be 1. Causes all the implemented counters to be set
to 0.
SP Save Parameters. A value of 1 indicates that certain counters are to be cleared
from non-volatile memory.
PC Page Control. Must be 01b OR 11b.
Parameter Must be 0.
List Length