Why SYNC_HWCLOCK is not working when it is set to yes Red Hat Enterprise Linux 6?

Solution Unverified - Updated -

Issue

  • After a reboot, hardware clock is not synchronized with system clock even if the option SYNC_HWCLOCK is yes in /etc/sysconfig/ntpd:
# cat /etc/sysconfig/ntpd
SYNC_HWCLOCK=yes

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • NTP

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