IBM i 830 Repair Manual page 383

If the disk unit that stopped communicating with the system has mirrored
protection active, normal operation of the system stops for 1 to 2 minutes. Then the
system suspends mirrored protection for the disk unit that stopped communicating
and continues normal operation. See "Disk Service Support" on page 893 for more
information on systems with mirrored protection.
Read the "Overview" on page 341 before continuing with this procedure.
1. Was a Problem Summary Form completed for this problem?
No Yes
↓
Use the Problem Summary Form information and go to step 3 of this
procedure.
2. Fill out a Problem Summary Form using the information from words 1 through
9 from the control panel. It is important that all the words of the SRC be
written on the Problem Summary Form.
3. Recovery from a device command time out may have caused the
communications loss condition (indicated by an SRC on the control panel). This
communications loss condition has the following symptoms:
v The A6xx SRC does not increment within 2 minutes.
v The system continues to run normally after it recovers from the
communications loss condition and the SRC is cleared from the control panel.
Does the communication loss condition have these symptoms?
Yes No
↓
Go to step 6 of this procedure.
4. Verify that all Licensed Internal Code PTFs have been applied to the system.
Apply any Licensed Internal Code PTFs that have not been applied to the
system.
Does the intermittent condition continue?
Yes No
↓
This ends the procedure.
5. Print all product activity logs. Print the LIC Logs with a major code of 1000.
Provide your next level of support with this information.
This ends the procedure.
6. Are characters 7-8 of the top 16 character line of function 12 (2 rightmost
characters of word 2) equal to 13 or 17?
Yes No
↓
Go to step 11 of this procedure.
7. Use the word 1 through 9 information recorded on the Problem Summary
Form to determine the disk unit that stopped communicating with the system:
v Characters 9-16 of the top 16 character line of function 12 (word 3) contain
the IOP direct select address.
v Characters 1-8 of the bottom 16 character line of function 12 (word 4)
contains the unit address.
v Characters 1-8 of the top 16 character line of function 13 (word 6) may
contain the disk unit type, level and model number.
v Characters 13-16 of the top 16 character line of function 13 (4 rightmost
characters of word 7) may contain the disk unit reference code.
Chapter 3. Problem Isolation Procedures (PIPs), Failing Items, and Symbolic FRU Isolation
LIC PIPs
369