Table 42 Read Log Ext Log Page 11H Data Structure Definition - Hitachi HDS721050CLA362 Specifications

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n
n+1
n+2
n +
Counter
n Length
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508
509
510
511
Table 41 READ LOG EXT Log Page 11h data structure definition
Counter n Identifier
Phy event counter identifier that corresponds to Counter n Value. Specifies the particular event counter
that is being reported. The Identifier is 16 bits in length.
Valid identifiers are listed in
Counter n Value
Value of the Phy event counter that corresponds to Counter n Identifier. The number of significant bits is
determined by Counter n Identifier bits 14:12 (as defined in section 4.3.2). The length of Counter n Value
shall always be a multiple of 16-bits. All counters are one-extended. For example, if a counter is only
physically implemented as 8-bits when it reaches the maximum value of 0xFF, it shall be one-extended to
0xFFFF. The counter shall stop (and not wrap to zero) after reaching its maximum value.
Counter n Length
Size of the Phy event counter as defined by bits 14:12 of Counter n Identifier.
The size of the Phy event counter shall be a multiple of 16-bits.
Data Structure Checksum
The data structure checksum is the 2's complement of the sum of the first 511 bytes in the data structure.
Each byte shall be added with unsigned arithmetic and overflow shall be ignored. The sum of all 512
bytes of the data structure will be zero when the checksum is correct.
Reserved All reserved fields shall be cleared to zero
HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
Counter n Identifier
Counter n Value
Reserved
Data Structure Checksum
Table 41
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