Definitely upgrade the RAM. Also get at least two drives in RAID or ZFS or something so you can tolerate a failure. And keep backups too, if you can’t afford to lose data.
In case of disk failure, simply redeploy and restore backups. Having an automated and fast redeployment procedure (and working backups) is a must-have, disk fault tolerance is not, IMHO (unless you have specific requirements).
I would try to find something a bit newer. Core 2 Duos are really power hungry. Find one with an i5 processor and a T at the end of the number, like i5 3450T or something. This will be a little less performant but run at 30 watt max compared to the core 2 duos 150 watt. Fujitsu esprimo are also a good cheap option and both lenovo and Fujitsu offer rather tiny pcs that work excellent for severs.
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Definitely upgrade the RAM. Also get at least two drives in RAID or ZFS or something so you can tolerate a failure. And keep backups too, if you can’t afford to lose data.
Why do you think OP needs high availability?
In case of disk failure, simply redeploy and restore backups. Having an automated and fast redeployment procedure (and working backups) is a must-have, disk fault tolerance is not, IMHO (unless you have specific requirements).
I don’t think OP has backups.
Having one, the other, or both depends on how sure you need to be about recovery, and whether you care about it being available until recovery.
It’s not worth more than $5
I would try to find something a bit newer. Core 2 Duos are really power hungry. Find one with an i5 processor and a T at the end of the number, like i5 3450T or something. This will be a little less performant but run at 30 watt max compared to the core 2 duos 150 watt. Fujitsu esprimo are also a good cheap option and both lenovo and Fujitsu offer rather tiny pcs that work excellent for severs.
Another doubt of mine is about power consumption, any thoughts on it too?
Yep, it will do it. Better than a Pi, also those CPUs are somehow very decent at virtualization.