CHAPTER 8 DSM-11 ERROR LOG MESSAGES
8.1 INTRODUCTION
Chapter 8 covers the DSM-11 error log messages. It explains how to invoke and how to decode a DSM -11 error log message.
8.2 INVOKING DSM-l1 ERROR LOG UTILITY
Ask the operator to run the DSM-l1 error log utility or ask for for permission to use the system.
At the prompt type D AKTR
This is the caretaker utility.
You should get the following responses:
NOTE
Your input is bolded. [RET] is the return key.
Print errors for devices <*> ?
*
Output Device ? <0> LPO
Starting date (DD-MMM-YY) <First entry> [RET]
Starting time HH:MM <First entry> [RET]
8.3 DECODING DSM-ll ERROR LOG MESSAGES
Figure 8-1 shows the MSCP error log packet of a DSM-11 error log message. The words are numbered to help decode the MSCP error log message. The following DSM-11 error log message examples are shown:
•
DSM-11 SDI error log message (Example 8-1)•
DSM-11 Disk Transfer error log message (Example 8-2)8-1
FOR INTERNAL USE ONLY determines the position of the words within the MSCP error log packet.
Figure 8-2 Word 4 Format this helps decode MSCP error log packets.
8.3.1 OSM-11 SOl Error Log Message
FOR INTERNAL USE ONLY DSM-11 ERROR LOG MESSAGES
DSM-11 error log message reports SDI errors detected by the drive and by the controller. An example of an SDI error message (Example 8-1) follows. The numbers on the right-hand side of the example refer to the list of definitions following the example.
Example 8-1 OSM-11 SOl Error Log Messa'ge command reference number is 1337 (Octal).
1. High word of a command reference number (Section 14.1.1).
2. Unit number (Section 14.1.2). In this example, the unit number is O.
3. Sequence number (Section 14.1.3). In this example, the sequence number is O.
4. Format and Message flag. The low byte of word 4 is a format code (Section 14.1.4). The high byte of word 4 is a message flag (Section 14.1.5). In this example, the format is 3, the flag indicates operation continuing, and the sequence number has been reset.
5. Status/Event code (Section 14.1.6). In this example, the status/event code indicates a drive-detected error.
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6. Low word of a unique controller number (Section 14.1.7).
7. Middle word of a unique controller number (Section 14.1.7).
8. High word of a unique controller number (Section 14.1.7). In this example, the controller serial number is O.
9. Controller model and controller class. The low byte is the controller model
(Section 14.1.8). The high byte is the controller class (Section 14.1.9). In this example, the controller class is mass storage, and the controller model is UDASO-A.
10. Controller software version and the controller hardware version. The low byte is the controller softWare version (Section 14.1.10). The high byte is the controller hardware version (Section 14.1.11). In this example, the controller hardware version is 0, and the controller software version is 4.
11. Multiunit code (Section 14.1.12). In this example, the path is 2.
12. Low word of the drive serial number (Section 14.1.14).
13. Middle word of the drive serial number (Section 14.1.14).
14. High word of the drive serial number (Section 14.1.14). In this example, the drive serial number is 32171 (Octal).
15. Drive model and drive class. The low byte is the drive model (Section 14.1.15). The high byte is the drive class (Section 14.1.16). In this example, the drive class is a DSA disk, and the drive model is RA81.
16. Drive software and hardware version. The low byte is the drive software version (Section 14.1.17). The high byte is the drive hardware version (Section 14.1.18). In this example, the drive software version is 6, and the drive hardware version is 4.
17. Reserved.
18. Low word of the volume serial number (Section 14.1.21).
19. High word of the volume serial number (Section 14.1.21). In this example, the volume serial number is O.
20. Low word of the header code (LBN) (Section 14.1.22).
21. High word of the header code (LBN) (Section 14.1.22). In this example, the header code of the LBN is 0, and it is good.
22. Request and mode bytes. The low byte is the request byte (Section 14.1.34). The high byte is the mode byte (Section 14.1.34). In this example, the drive can be formatted, information is available in the extended status area of drive memory, the drive select switch is pushed in (selected), the Run/Stop switch is pushed in (run), and the drive spindle is up to speed.
23. Error and controller bytes. The low byte is the error byte (Section 14.1.34). The high byte is the controller byte (Section 14.1.34). In this example, a drive error has occurred.
24. Drive status bytes (Section 14.1.34).
~. Packet type. In this example, the packet type is SDI error.
81. Command reference number (Section 14.1.1). In this example, the command reference number is O.
~. Unit number of the drive being accessed (Section 14.1.2). In this example, the unit number is O.
FOR INTERNAL USE ONLY DSM-11 ERROR LOG MESSAGES
§. Pa<:ket status code. It is a translation of the MSCP packet word 5 (Section 14.1.6). In this example, there is a drive detected error.
rn.
Controller software version (Section 14.1.10). In this example, the controller software version is 4.[4. Unit serial number (Section 14.1.14). In this example, the unit serial number is 13433.
00. Unit model (Section 14.1.15). In this example, the unit model is RA81.
The DSM-11 Disk Transfer error log message is used to report errors detected while transferring data between the controller and drive. Following is an example of a disk transfer error message (Example 8-2). The numbers on the right-hand side of the example refer to the list of definitions
O. MSCP error log packet describe the decoding of the following words (Figure 8-1).
O. Low word of a command reference number (Section 14.1.1). In this example, the command reference number is 361 (Octal).
1. High word of a command reference number (Section 14.1.1).
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2. Unit number (Section 14.1.2). In this example, the unit number is O.
3. Sequence number (Section 14.1.3). In this example, the sequence number is O.
4. Format and the message flag. The low byte of word 4 is a format code (Section 14.1.4).
The high byte of word 4 is a message flag (Section 14.1.5). In this example, the format is 2, the message flag indicates it has been completed successfully, and the sequence number has been reset.
5. Status/Event code (Section 14.1.6). In this example, the status event code indicates a one symbol EeC error occurred.
6. Low word of a unique controller number (Section 14.1.7). In this example, the controller
serial number is O. "
7. Middle word of a unique controller number (Section 14.1.7).
8. High word of a unique controller number (Section 14.1.7).
9. Controller model and controller class. The low byte is the controller model
(Section 14.1.8). The high byte is the controller class (Section 14.1.9). In this example, the controller class is mass storage and the controller model is a UDA50-A.
10. Controller software version and the controller hardware version. The low byte is the controller software version (Section 14.1.10). The high byte is the controller hardware version (Section 14.1.11). In this example, the hardware version is 0 and the software version is 4.
11. Multiunit code (Section 14.1.12). In this example, the path is 2.
12. Low word of the drive serial number (Section 14.1.14). In this example, the drive serial number is 5674 (Octal).
13. Middle word of the drive serial number (Section 14.1.14).
14. High word of the drive serial number (Section 14.1.14).
15. Drive class and drive model. The high byte is the drive class (Section 14.1.16). The low byte is the drive model (Section 14.1.15). In this example, the drive class is DSA and the drive model is RA81.
16. Drive hardware version and drive software version. The high byte is the drive hardware version (Section 14.1.18). The low byte is the drive software version (Section 14.1.17).
In this example, the software version is 6 and the hardware version is 4.
17. Level and retry. The low byte is the level (Section 14.1.19). The high byte is the retry (Section 14.1.20). In this example, the level and retry are O.
18. Low word of the volume serial number (S"ection 14.1.21). In this example, the volume serial number is O.
19. High word of the volume serial number (Section 14.1.21).
20. Low word of the header code (LBN) (Section 14.1.22). In this example, the low word of the header code is 114357.
21. High word of the header code (LBN) (Section 14.1.22). In this example, the high word of the header code is 15.
22. Request and mode byte. The low byte is the request byte (Section 14.1.34». The high byte is the mode byte (Section 14.1.34). In this example, the word is 01375.
23. Error and controller byte. The low byte is the error byte (Section 14.1.34». The high
FOR INTERNAL USE ONLY DSM-11 ERROR LOG MESSAGES
~. Packet type. In this example, the packet type is a disk transfer error.
g). Command reference number (Section 14.1.1). In this example, the command reference number is 361 (Octal).
~. Unit number of the drive being accessed (Section 14.1.2). In this example, the unit number is O.
§. Packet status code and is also a translation of the MSCP packet word 5 (Section 14.1.6). In this example, there is a one-symbol ECC error.
rn.
Controller software version (Section 14.1.10). In this example, the controller software version is 4.~. Unit serial number (Section 14.1.14); In this example, the unit serial number is 3004.
m.
Unit model (Section 14.1.15). In this example, the unit model is RA81.~. LBN. In this example, the LBN is 891119.
ml. DSA block type. In this example, the LBN is in the host area.
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