IBM SY44-5902-05 manual Service Functions V5R2

To exit DST and return to the operating system, select the Resume operating system display option on the Use Dedicated Service Tools (DST) display.

For more information, see Chapter 1, “Dedicated Service Tools (DST)” on page 1.

Function 22–Dump Main Storage: This function dumps main storage and processor data to the disk.

Note: Prior to pressing function 22, check to see whether function 34 is available (00 shows in the panel after you select function 34). If it is available, then the system is attempting to run a main storage dump IPL. Using function 34 attempts to retry the IPL such that the original dump is not lost. If function 34 is not enabled (>FF shows in the panel after you select function 34), go back and start function 22.

The first time that you select function 22 and press Enter, the system displays attention SRC 11 A1xx 3022. This indicates that you selected function 22. To dump main storage and system processor data to the disk, you must select function 22 again and press Enter. See “Performing a main storage dump to disk (manual MSD)” on page 271.

Use this function only when a main storage dump is necessary, for example, a suspended (system hang) condition or after an operating system failure.

Attention: No system shutdown is performed before the main storage dump. The use of this function can cause loss of data. See “Function 34–Retry MSD IPL” on page 186.

Functions 25 and 26–Service Switches 1 and 2: In function 25, the service representative switch 1 is set. Function 25 is the first step necessary to set the service function range (50 to 99).

In function 26, the service representative switch 2 is set. Function 26 is the second step necessary to set the service function range (50 to 99).

Function 33–Reorder SPCN Addressing: This function puts the rack addresses in the correct order to show their position in the System Power Control Network (SPCN). Use it when you have added racks to or removed them from the system.

Function 34–Retry MSD or CPM IPL: Function 34 is enabled only for main storage dump IPLs or CPM IPLs. You can use it when the system is hung during the MSD IPL or CPM IPL to retry the IPL without losing the original dump information.

Prior to pressing function 22, check to see whether function 34 is available (00 shows in the panel after you select function 34). If it is available, then the system is attempting to run a main storage dump or power failure recovery (CPM) IPL. Using function 34 attempts to retry the IPL such that the original dump is not lost. If function 34 is not enabled (>FF shows in the panel after you select function 34), go back and start function 22. See “Function 22–Dump Main Storage”.

Service Extended Panel Functions (Models 150, 170, 250, 4xx, 50x, 51x, 530, 53S, 6xx, 7xx, SB1, and Sxx)

170Service Functions V5R2