We have a Redhat server that performs a daily data backup via Tapeware.

However, the time clock seems to lose around 45 minutes every day. This results in data backups being performed during business hours.

My experience with hardware tells me that the system clock is controlled by a lithium battery on the motherboard.  However, this computer is only one year old. I've tried to maintain the clock via a network time server, but it always seems to disconnect itself the next day.

Could the time loss be due to any other reason? Is there anything else I could try short of replacing the battery (which I instinctively think isn't the problem)?

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On booting the hardware clock is read by the system and then the time is kept track of in software.

You can use the command hwclock to keep the hardware and system clock in synch.

What I do here at work is synch one of my servers with a public time server on the net and then synch my hardware clock to the new precise system time.

If you trust your hardware clock you could simply run a cron job before your backup which adjusts the time with "hwclock --systohc".

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