Seagate SCSI Interface Product Manual page 196

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Table 140: Diagnostic Data Bytes
Code Byte Description
00h 0 Additional Length (MSB) [1]
28h 1 Additional Length (LSB) [1]
XXh 2 FRU Code (most probable) [2]
XXh 3 FRU Code [2]
XXh 4 FRU Code [2]
XXh 5 FRU Code (least probable) [2]
XXh 6 Error Code (MSB) [3]
V.U. 7 Error Code (LSB) [4]
V.U. 8 thru n Additional Vendor Unique Fault Information [5]
Notes.
[1] Additional Length. This two byte value indicates the number of additional bytes included in the diagnostic
data list. For example, if no product unique byte (byte 7) is available, this value would be 0006h. A value of
0000h means that there are no additional bytes.
[2] A Field Replaceable Unit (FRU) Code is a byte that identifies an assembly that may have failed. The
codes will be listed in probability order, with the most probable assembly listed first and the least probable
listed last. A code of 00h indicates there is no FRU information and a code of 01h indicates the entire unit
should be replaced. Seagate drives return 00h in these bytes.
[3] The Error Code is a two byte value that provides information designating which part of a diagnostic opera-
tion has failed. The byte 7 error code is vendor unique and defined in note [4]. Usually, Seagate drives
support only some subset of the list given in note [4].
[4] Vendor Unique.
Diagnostic Fault Codes
01h Formatter Diagnostic Error
02h Microprocessor RAM Diagnostic Error
04h No Drive Ready
08h No Sector or Index Detected
09h Fatal Hardware Error While Doing Drive Diagnostics
0Ch No Drive Command Complete
10h Unable to Set Drive Sector Size
14h Unable to Clear Drive Attention
18h Unable to Start Spindle Motor
20h Unable to Recal Drive
30h Unable to Send Write Current Data to Drive
34h Unable to Issue Drive Seek Command
40h Unable to Read User Table From Drive
41h Ran Out of Sectors While Doing Drive Diagnostics
42h Unable to Read Reallocation Table
43h Unable to Read ETF Log
45h Firmware Read from Disc or Sent by Host has an Invalid Checksum
60h Thermal Calibration Failure
70h Microprocessor Internal Timer Error
80h Buffer Controller Diagnostic Error
81h Buffer RAM Diagnostic Error
C1h Data Miscompare While Doing Drive Diagnostics
[5] Additional Vendor Unique codes (not available).
SCSI Interface Product Manual, Rev. J