this time is held in memory and not affected directly by read-only access.
A cron job is run hourly to save the current system time to
When successful network communication is established between the ESXi/ESX host and the NTP server, review the logs and network traffic to ensure that NTP synchronization is occurring and that the discrepancy is being reduced.
Your Mac running Mavericks synchronizes with a region-specific Apple Network Time Protocol server.
In my case, that is time.which is a fine NTP server.
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That’s when the network time protocol (NTP) is useful.
NTP lets you automatically sync your system time with a remote server.
For more information on NTP and Net Logond, see the VMware documentation.
For related information, see Installing and Configuring NTP on an ESX host (1339) and Synchronizing ESXi/ESX time with a Microsoft Domain Controller (1035833).
When the ntp daemon is initiated at boot-up it will attempt to correct the current system time that was previously loaded from the file using ntp servers.
Only the initial synchronization attempts are able to overcome a difference greater than 1000 secs, if any subsequent attempts discover a difference of 1000 secs or more the ntp daemon will terminate and no longer monitor or correct the time as it assumes user intervention is required to resolve a greater issue than a minor alignment.
The latest SD card image has had some issues with the fake-hwclock and many of the problems encountered with using a read-only file system on a Pi are down to incorrect timestamps as either a network connection isn't available or the files are locked to read-only and cannot be updated.