In the case of problems with a managed system, or the failure of a managed system, the remote restart (RR) or simplified remote restart (SRR) feature makes it possible to restart one or more LPARs from such a system onto another managed system. An LPAR with the identical configuration is created on the target managed system and then started. If a managed system fails, this enables a quick restart of important LPARs onto another, working hardware.

View the remote restart capabilities of one or more HMCs with hmc lsrr:

$ hmc lsrr hmc01 hmc02
HMC    AUTO_CLEANUP_ENABLED
hmc01  1
hmc02  1
$

Currently, auto_cleanup_enabled is the only capability supported by HMCs. After a remote restart operation, this automatically carries out a cleanup on the original managed system as soon as it is available again.

Whether a managed system supports remote restart (RR) or simplified remote restart (SRR), as well as how many such operations are currently being executed, can be displayed using the “ms lsrr” command:

$ ms lsrr ms11 ms13 ms15 ms17 ms18
NAME  RR  SRR  MAX_NUM_RR  RR_IN_PROGRESS
ms11  0   0    0           0
ms13  1   0    32          0
ms15  1   1    32          0
ms17  1   1    32          0
ms18  0   1    32          0
$

Note: New power systems usually only support simplified remote restart.

You can determine whether one (or more) LPAR(s) support remote restart using “lpar lsrr“:

$ lpar -m ms18 lsrr
LPAR        RR  SRR  MS    STATE
aixtsmp104  0   0    ms18  null
aixtsmp902  0   0    ms18  null
aixtsmp904  0   0    ms18  null
aixtsmp908  0   0    ms18  null
saptest1    0   1    ms18  Remote Restartable
ms18-vio1   0   0    ms18  null
ms18-vio2   0   0    ms18  null
$

A remote restart or simplified remote restart operation can be started manually using the “lpar restart” command. Normally this is used in the event of problems or failure of a managed system:

$ lpar restart saptest1 ms17
    > saptest1
$

The LPAR is automatically restarted. As soon as the initial managed system is accessible again, the HMC will remove the source LPAR that is still there (if auto_cleanup_enabled is turned on).