HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification 
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11.18.2.4    Device error count 
This field shall contain the total number of errors attributable to the device that have been reported by the device 
during the life of the device. This count shall not include errors attributed to the receipt of faulty commands such 
as commands codes not implemented by the device or requests with invalid parameters or invalid addresses. If 
the maximum value for this field is reached the count shall remain at the maximum value when additional errors 
are encountered and logged. 
11.18.3  Extended Self-test log sector 
Table 107 defines the format of each of the sectors that comprise the Extended SMART self-test log.   
The Extended SMART self-test log sector shall support 48-bit and 28-bit addressing. All 28-bit entries contained 
in the SMART self-test log, defined in 7.42.6, ―Self-test log data structure" on page 220 shall also be included in 
the Extended SMART self-test log with all 48-bit entries. 
Self-test log data structure revision number 
Self-test descriptor index (7:0) 
Self-test descriptor index (15:8) 
Table 107    Extended Self-test log data structure 
These descriptor entries are viewed as a circular buffer. The nineteenth self-test shall create a descriptor entry 
that  replaces  descriptor  entry  1.  The  next  self-test  after  that  shall  create  a  descriptor  entry  that  replaces 
descriptor entry 2, etc. All unused self-test descriptors shall be filled with zeros. 
11.18.3.1    Self-test log data structure revision number 
The value of this revision number shall be 01h. 
11.18.3.2    Self-test descriptor index 
This indicates the most recent self-test descriptor. If there have been no self-tests, this is set to zero. Valid 
values for the Self-test descriptor index are 0 to 18.