Hitachi Compute Blade 2000, User Manual

Page: 1086 / 1927

1035
12
Log
ical
par
titio
ni
ng man
age
r
Item Time/
Timer
counter
Precision
sec./day
Time synchronization
Before Save Time
Config is supported
After Save Time
Config is supported
・
Periodic time
synchronization
once every 15
minutes
・
Date and Time
screen (*1)
LPAR Logical RTC
time
± 1
・
Use a command
such as guest
firmware command
and guest OS
command.
・
Date and Time
screen (*1)(*2)
・
Use a command,
such as guest
firmware
command and
guest OS
command.
・
Date and Time
screen (*1)
・
Periodic time
synchronization
once every 15
minutes)
SEL time
± 1
・
Date and Time
screen (*1)(*2)
・
SC/Agent
・
Date and Time
screen (*1)
・
SC/Agent
・
Periodic time
synchronization
once every 15
minutes
Timer counter
± 1
- -
Interrupt timer
± 1
- -
Guest Time zone - Use a command such as
the guest OS command.
Use a command
such as the guest OS
command.
OS system
time
(*3)(*4)
(*5)(*6)
± 2
Use a command such as
the guest OS command.
Use a command
such as the guest OS
command.
(*1) When the LPAR is deactivated, you can adjust the logical RTC time. If you have
adjusted the system equipment time or if an external NTP server has caused
time difference from the LPAR manager system time, it is strongly
recommended that you should adjust the differentials between the physical
RTC time and LPAR manager system time using “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 the F9 key: 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) Kernel parameters not recommended by LPAR manager might cause problems
such as large delay in the OS system time or failure in OS boot. See the
Hitachi Compute Blade 2000 Software Guide for details.
(*4) When the scheduling is in shared mode and the service time is extremely low
with Red Hat Enterprise Linux 5.3 (AMD/Intel 64), a time lag might be around
10 seconds a day. If this happens, check the service ratio and processor group
settings and adjust them if necessary.
(*5) You can select LP TimerCounter Precision on the Options screen. See “LP