Device Time Synchronization
The ETERNUS AF treats the time that is specified in the Master CM as the system standard time and distributes
that time to other modules to synchronize the storage time. The ETERNUS AF also supports the time correction
function by using the Network Time Protocol (NTP). The ETERNUS AF corrects the system time by obtaining the
time information from the NTP server during regular time correction.
The ETERNUS AF has a clock function and manages time information of date/time and the time zone (the region
in which the ETERNUS AF is installed). This time information is used for internal logs and for functions such as
Eco-mode, remote copy, and remote support.
The automatic time correction by NTP is recommended to synchronize time in the whole system.
When using the NTP, specify the NTP server or the SNTP server. The ETERNUS AF supports NTP protocol v4. The
time correction mode is Step mode (immediate correction). The time is regularly corrected every three hours
once the NTP is set.
Caution
If an error occurs in a system that has a different date and time for each device, analyzing the cause of this
error may be difficult.
Figure 43
Device Time Synchronization
NTP server
ETERNUS AF
Daylight Saving Time
Date and Time
Time Zone
yyyy
mm
dd
xx:xx:xx
GMT + 09.00
NTP
2. Basic Functions
Operation Management/Device Monitoring
88
Design Guide
Содержание ETERNUS AF S3 Series
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