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Toshiba Corporation Digital Media Network Company
Page 139 of 157
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Word 7 bit 4 is cleared to disable support for the Power-up in Standby feature set and has the effect of clearing
bits 5 and 6 in words 83 and 86 and clearing the value in word 94 of the IDENTIFY DEVICE or IDENTIFY
PACKET DEVICE response. If Power-up in Standby has been enabled by a jumper, these bits shall not be
cleared.
Word 7 bit 3 is cleared to disable support for the Security feature set and has the effect of clearing bit 1 in words
82 and 85 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. These bits shall not be cleared if
the Security feature set has been enabled.
Word 7 bit 2 is cleared to disable support for the SMART error logging and has the effect of clearing bit 0 in
words 84 and 87 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response.
Word 7 bit 1 is cleared to disable support for the SMART self-test and has the effect of clearing bit 1 in words 84
and 87 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response.
Word 7 bit 0 is cleared to disable support for the SMART feature set and has the effect of clearing bit 0 in words
82 and 85 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. If bits 1 and 2 of word 7 are not
cleared to zero or if the SMART feature set has been enabled by use of the SMART ENABLE OPERATIONS
command, these bits shall not be cleared and the device shall return command aborted.
10.8.45.4.2.6 Words 8-254: Reserved
10.8.45.4.2.7 Word 255: Integrity word
Bits 7:0 of this word shall contain the value A5h. Bits 15:8 of this word shall contain the data structure checksum.
The data structure checksum shall be the two’s complement of the sum of all byte in words 0 through 254 and
the byte consisting of bits 7:0 of word 255. Each byte shall be added with unsigned arithmetic, and overflow shall
be ignored. The sum of all bytes is zero when the checksum is correct.