Specifications

12.2.12 Vendor unique error information (Byte 20 through 23)
This field gives detailed information about the error. It contains a unique code which describes where the
error was detected and which piece of hardware or microcode detected the error depending on current
operation (that is, Bring-up operation, Read/Write operation, or SMART Alert).
12.2.12.1 Power On Reset/Initialization Error (Sense Key 02h)
For failures in the bring-up operation the Vendor Unique Error information bytes 20 and 21 will contain
"POR Step" which indicates where the failure was detected, and the Vendor Unique Error information
bytes 22 and 23 will contain "POR Error" which is the reason for failure.
Initialization by Usage TableBit 0
Start SpinningBit 1
Not UsedBit 2
Not UsedBit 3
RAM ERP Not ReadyBit 4
Soft Reset OccurredBit 5
Format Corrupted - Degraded ModeBit 6
Jumper Setting - Disable Auto Spin-UpBit 7
Description
Sense Data
Byte 20
Figure 208. Sense Data Byte 20 for POR STEP
Testing Sector Buffer RAMBit 0
Initiate Microcode LoadingBit 1
Starting Spindle MotorBit 2
Loading RAM CodeBit 3
Loading Overlay CodeBit 4
Loading Read-Only TableBit 5
Head Test ProcessingBit 6
RAM Table ValidationBit 7
Description
Sense Data
Byte 21
Figure 209. Sense Data Byte 21 for POR STEP
Ultrastar 146Z10 hard disk drive specifications
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