Time Adjustment - Hitachi Compute Blade 500 Series User Manual

Virtual VGA Device
Snapshot image storing
Web Server
External Console
The following table shows the supported versions of Internet Explorer and the
corresponding version of the LPAR manager firmware.
6.0
7.0
8.0
9.0

Time Adjustment

Logical Partitioning of Timers
LPAR manager manages five kinds of time shown in the following table. LPAR
manager creates each time using differentials between different times. Based
on the LPAR manager system time, LPAR manager creates the logical timer
for each LPAR. A guest OS on the LPAR manages "OS system time" using this
logical timer.
LPAR manager manages the following time shown in the table below.
System equipment
time (Physical RTC
time)
LPAR manager system
time
Logical RTC time
OS system time
Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide
Table 2-5 Components of Logical VGA Snapshot
Components
Virtual VGA device in which the guest OS writes image data.
Web server incorporated inside the LPAR manager. This
server obtains images from the virtual VGA device.
Console that operates the Web browser for displaying
snapshot images.
Internet Explorer version
Table 2-6 LPAR manager Managing Times
Time
A clock in the server blade running by the battery: shows a local
time. LPAR manager system time is based on this time.
Used for the LPAR manager screen display as the LPAR manager
time. Added elapsed time calculated with the timer counter
(TSC) to the physical RTC time at the LPAR manager boot.
Is the basis for the OS system time.
Calculated using the differentials from the LPAR manager
system time.
Used as a guest OS time. Added the elapsed time calculated
using the logical timer counter, timer interrupt, and the time
zone to the logical RTC time at the OS boot.
System Operation
Description
LPAR manager firmware version
01-0X or later
01-4X or later
Description
2-11