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6.Command Specification
Parameter Code: This identifies which parameter of data is being transferred. The following codes are supported for
each Error Counter Page.
Parameter Code
0001h Frame Read or Write
0002h Main Data SYMN Block Errors CH1
0003h Main Data SYMN Block Errors CH2
0004h Reserved
0005h Reserved
0006h Reserved
0007h Reserved
0008h Total Retry Count (Read Only)
0009h C2 un-correctable Block (Read Only)
Block_Error_Rate [CH1] = Param0002h / (Param0001h 224) [AIT1]
Block_Error_Rate [CH2] = Param0003h / (Param0001h 224) [AIT1]
6.6.10. Data Compression Transfer Log Page
The page allows the host to monitor the performance of the ALDC compression. The PC field in LOG SENSE
determines whether current cumulative, or current/default threshold values are returned. The page has the following
format:
Bit
7
Byte
0
Reserved
1
2
(MSB)
3
4
(MSB)
5
6
DU(0)
7
8
(MSB)
11
Data Compression Log Page Fields:
Supported Parameter Codes in this page and their meanings are as follows:
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
6-24
Param0002h / (Param0001h 336) [AIT2]
Param0003h / (Param0001h 336) [AIT2]
Table 6-27: Data Compression Transfer Log Page
6
5
DS(1)
TSD(0)
Length
Default Cumulative
4
0
4
0
4
0
4
0
4
0
4
0
4
0
4
0
4
0
4
3
Page Code (39h)
Reserved
Page Length (58h)
Parameter Code (n)
ETC(0)
TMC(00)
Parameter Length (4)
Parameter Value
SONY AIT-1 Turbo drive SDX-450V series Ver.1.0
LOG SENSE
Default Threshold
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
FFFFFFFFh
2
1
(LSB)
(LSB)
Reserved
LP(0)
(LSB)
0
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