NEC Express5800/R120f-1M Maintenance Manual page 63

Chapter 2 Useful Features
1. System BIOS
Tips Be sure to confirm that the date and time in the BIOS parameters are correctly
configured.
Check the system clock monthly. Additionally, if you implement the server in a
system that requires highly accurate time, use of a time server (an NTP server) is
recommended.
If the system time becomes considerably slow or fast over time even though you
regularly adjust it, contact the dealer where you purchased the server or the
maintenance service company for maintenance.
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Express5800/R120f-1M, R120f-2M Maintenance Guide