7. ATAPI Packet Command Specification
LOG SENSE
SONY AIT-2 Turbo drive SDX-560V series Ver.1.0
7-20
Table 7-27: Frame Error Counter Page Parameters
Code Description
Parameter Length
(Bytes)
Default Cumulative
Default
Threshold
0001h
Frame Read or Write
4
0
FFFFFFFFh
0002h
Main Data SYMN Block Errors CH1
4
0
FFFFFFFFh
0003h
Main Data SYMN Block Errors CH1
4
0
FFFFFFFFh
0004h Reserved
4
0
FFFFFFFFh
0005h Reserved
4
0
FFFFFFFFh
0006h Reserved
4
0
FFFFFFFFh
0007h Reserved
4
0
FFFFFFFFh
0008h
Total Retry Count (Read Only)
4
0
FFFFFFFFh
0009h
c2 un-correctable Block (Read Only)
4
0
FFFFFFFFh
Block_Error_Rate [CH1]=Param0002h/(Param0001hx224)
Block_Error_Rate [CH2]=Param0003h/(Param0001hx224)
7.6.10.
Data Compression Transfer Log Page Code 39h
This page allows the host to monitor the performance of the ALDC compression. The page has the following
format:
Table 7-28: LOG PAGE Data Compression Transfer (39h)
Bit
Byte
7 6 5 4 3 2 1 0
0
Reserved
Page Code (39h)
1
Reserved
2
(MSB)
3
Page Length (58h)
(LSB)
4
(MSB)
5
Parameter Code (n)
(LSB)
6
0 (DU)
1 (DS)
0 (TSD)
0 (ETC)
00 (TMC)
Reserved
0 (LP)
7
Parameter Length (4)
8
11
Parameter Value
Data Compression Log Page Fields:
Supported Parameter Codes in this page and their meanings are as follows:
Parameter Code
Description
0001h
Number of entities written
0002h
Number of entities read
0003h
Number of records written
0004h
Number of records read
0005h
Kilobytes to data compression
0006h
Kilobytes from data compression
0007h
Kilobytes to tape
0008h
Kilobytes from tape
0009h
Logical entity size
000Ah
Physical entity size
000Bh Uncompressed
entities
Entities Written/Read:
The total number of complete entities written to or read from the tape since the last power-
on or Clear Log operation.
Records Written/Read:
The total number of records (both compressed and uncompressed) written to or read
from the tape since the last power-on or Clear Log operation.
Kilobytes to/from Data Compression:
The total number of kilobytes written to or read from the tape since the
last power-on or Clear Log operation. For Kilobytes from Data Compression, this number may be greater than the
number of kilobytes transferred to the host due to read ahead.