About setting system date and time |
The Set Date/Time page displays the current date and time settings for the storage system.
Current System Date
Current System Time
Current System Time Zone
Current System Time Daemon Protocol (displayed only when the system is configured to use a time daemon for updates)
You can also change the date and time settings by launching the Modify Date/Time Wizard from this page.
You can set the system date and time manually or use a time daemon to keep the system time synchronized with a time server automatically. The time server must use the UDP time service (typically UDP port 37 for rdate; the UDP port assigned to NTP is 123). This service is available on most UNIX computers.
Note: There is currently no Windows 95 or Windows NT counterpart for synchronization. You must have a UNIX workstation that supports remote synchronization on your storage system network.
NetApp recommends that you use a time daemon because problems can occur when the system clock is inaccurate. The time daemon synchronizes the storage system date and time to an accuracy within one second of the date and time of the remote host.
NetApp strongly recommends that you use a time daemon to update the system time in a cluster configuration. For either method, Data ONTAP always attempts to keep the system time on the two nodes synchronized. One node is the "time master" and the other node is the "time slave." The determination of time master and time slave is automatic and cannot be controlled by administrators. The time slave always attempts to synchronize with the time master using the SNTP protocol over the cluster interconnect. If that attempt fails, the system time update method you choose determines whether the time slave will then try to synchronize directly with a time server.
You cannot set the time zone or synchronize the time from an emulated (or failed) storage system.