IBM Ultrastar 36LZX, Specifications

Page: 242 / 249

12.2.11 Reserved (Byte 18 through 19)
Reserved fields are filled with zero.
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 (i.e. Power On Reset/Initialization, Read/Write operation, or SMART Alert).
12.2.12.1 Power On Reset/Initialization Error (Sense Key 02h)
While Power On Reset/Initialization is in process, Sense Key 02h "Not Ready" is a possible failure and
the Vendor Unique Error information bytes 20 and 21 will contain "POR Step" which indicates where the
failure was detected during the microcode processing, and the Vendor Unique Error information bytes
22 and 23 will contain "POR Error" which is the reason for failure.
Initialization by Usage Table Bit.0
Start Spinning Bit.1
Not Used Bit.2
Not Used Bit.3
RAM ERP Not Ready Bit.4
Soft Reset Occurred Bit.5
Format Corrupted - Degraded Mode Bit.6
Jumper Setting - Disable Auto Spin-Up Bit.7
Description
Sense Data
Byte 20
Testing Sector Buffer RAM Bit.0
Initiate Microcode Loading Bit.1
Starting Spindle Motor Bit.2
Loading RAM Code Bit.3
Loading Overlay Code Bit.4
Loading Read-Only Table Bit.5
Head Test Processing Bit.6
RAM Table Validation Bit.7
Description
Sense Data
Byte 21
Figure 191. Sense Data Byte 20 and 21 for POR Step
Ultrastar 36LZX hard disk drive specifications
242