Toshiba MK4006GAH Manuale Utente

 

 

Toshiba Corporation Digital Media Network Company 

 

Page 134 of 153 

    © 2003, Copyright TOSHIBA Corporation All Rights Reserved 

 
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. 
 

 

 
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.