Fujitsu M10-4 Service Manual page 50

Inactive maintenance
■
Maintenance is performed while the physical partition of a FRU requiring
maintenance is stopped.
Inactive maintenance applies to a system with two or more partitions in a
multiple-BB configuration only.
Therefore, regarding the SPARC M10-4 and also the SPARC M10-4S with the 1BB
configuration, the type of maintenance performed with the physical partition
stopped is system-stopped maintenance, not inactive maintenance.
System-stopped maintenance
■
Maintenance is performed with all physical partitions stopped.
Each of the three maintenance types is further divided into two types: hot
maintenance and cold maintenance.
Hot maintenance
■
Maintenance is performed with the power cord of the FRU requiring maintenance
connected.
Cold maintenance
■
Maintenance is performed with the power cord of the FRU requiring maintenance
removed.
The FRUs for which hot maintenance or cold maintenance is enabled differ between a
configuration using one SPARC M10-4 or SPARC M10-4S unit and a building block
configuration using two or more SPARC M10-4S units.
For example, active/cold maintenance can be performed on a CPU memory unit only
if it is in a building block configuration. In this state, the physical partition to which
the target CPU memory unit belongs is operating (active). This means that
maintenance is performed after this CPU memory unit (PSB) is dynamically released
from the physical partition and the power cord of the CPU memory unit is removed.
Furthermore, system-stopped/cold maintenance for a building block configuration is
divided into the following two types:
Maintenance performed with the maintenance menu when only the SPARC
■
M10-4S requiring maintenance is in the cold state
Maintenance performed without using the maintenance menu when every SPARC
■
M10-4S is in the cold state
The latter is called "system-stopped/all power-off cold maintenance" to distinguish it
from the maintenance performed with the maintenance menu.
Table 3-2
aspects: system availability, the time required for maintenance, and the difficulty
level of maintenance work.
Table 3-2 Characteristics of each type of maintenance
Type of maintenance
Active/Hot maintenance
Active/Cold maintenance
Inactive/Hot maintenance
36 Fujitsu M10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･ June 2023
lists the characteristics of each type of maintenance viewed from three
System availability
Higher
|
|
Time required for Difficulty level of
maintenance maintenance work
Shorter Higher
| |
| |