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Snapshots have stopped
Hi, I have had my ReadyNAS 314 for quite a number of years with Snapshots enabled and have only had one issue during all that time which the ReadyNAS team resolved for me after a firmware update (2 - 3 years ago).
I realised recently that my Snapshots had stopped working as of 29 June. Smart Snapshots are enabled yet it is showing me that there are zero snapshots and no further entries in my log files from 30 June onwards.
The only thing I can see in the syslog is that it started a Radar Update on 28 June but no idea if it is related as there is one more snapshot prune after this occured and then none. I am running 6.10.1 (recently upgraded to it). Would appreciate any advice.
Thanks in advance.
The default setting was 95%, but they might have dropped it down to 90% after that (my own NAS is set to 90). If yours is set to 85%, then you probably adjusted it.
But I think that explains it. Your system is over the threshold (~86% full based on your earlier post). The system probably started deleting the oldest snapshots a while ago - bringing the free space back up to 85%. But your main volume continued to grow and eventually the system deleted them all.
So the solution is to expand the volume. Though you could bump the setting up a bit for now, I wouldn't go above 90.
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How full is your data volume?
I have 709 GB of 4.75 TB free - about 15%.
I see this message in the Logs, but have been comfortable with the space free until it drops below 10% - Volume: Less than 20% of volume data's capacity is free. Performance on volume data will degrade if additional capacity is consumed. NETGEAR recommends that you add capacity to avoid performance degradation.
Have you looked in the log zip file? snapper.log has a list of snapshots - you can use that to confirm that you have no recent ones.
Also look for "snapper" in system.log. You should see some indication that it is running (and hopefully saying why it failed to create a snapshot).
darthy wrote:
... have been comfortable with the space free until it drops below 10% - Volume: Less than 20% of volume data's capacity is free.
The on-disk snapshot space can sometimes increase dramatically very quickly, so I personally don't recommend allowing free space to drop to 10%. You easily can end up with problems that require you to destroy your volume and restore it from backup. I have run at 15% at times.
One problem with the smart snapshots is that the monthly ones are never pruned - so eventually they will fill the volume. Options to avoid that are
- manually delete old snapshots from time to time
- switch to custom snapshots, which have a retention setting.
Personally I use custom snapshots.
Anyway, you might want to delete some of the oldest snapshots after you get the main problem resolved (or consider switching to the custom settings).
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