Hitachi Compute Blade 500 Series User Manual page 85

Time/Timer
Item
counter
SEL time
TimerCounter
Interrupt timer
Guest OS Time zone
Guest OS
system time
5
Notes:
1 When the LPAR is deactivated, you can adjust the physical RTC time. If you adjusted
.
the system equipment time, it is strongly recommended that you should adjust the
physical RTC time by the Adjust LPAR Time before booting the guest OS.
2 The differentials between the logical RTC time and logical SEL time will be saved by
.
pressing [F9]: Save Configuration on the LPAR manager Menu screen. LPAR
manager does not save the differential information automatically. When you adjust
the logical RTC, press [F9]: Save Configuration on the LPAR manager Menu screen.
If you shut down or reboot LPAR manager before saving it or the N+M cold standby
function changes server blades, the adjusted differentials are lost.
3 When you use the kernel parameter which LPAR manager does not recommend, the
.
following phenomenon may occur; such that boot fails or "OS system time" differs
from actual time greatly.
4 You can select LP TimerCounter Base on LP Options screen. LP TimerCounter Base is
.
displayed when the timer precision of "TSC" is lower during operation, you can
select "TSC" or "Cpu Frequency". Select the smaller one for time-lag. LP
TimerCounter Base is not displayed when the timer precision of "TSC" is higher,
"TSC" is operated. For details of setting, see
5 To keep the OS system time accurate, it's recommended that you have the OS
.
system time be synchronized with the NTP.
Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide
Precision
Before Save Time
[sec./day]
Guest OS
command.
Date and Time
screen
±1 Date and Time
screen
SC/Agent
±1 -
±1 -
- Guest OS
command.
±2 Guest OS
3, 4, command.
LP Options on page
System Operation
Time synchronization
After Save Time
Config is Config is
supported supported
Guest OS
command.
Date and Time
1, 2
screen
Periodic time
synchronization
once every 15
minutes
Date and Time
1, 2
screen
SC/Agent
Periodic time
synchronization
once every 15
minutes
-
-
-Guest OS
command.
-Guest OS
command.
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1
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