old snapshots in freenas-boot

[umproko5]

I was just looking around at the snapshots and found this,

# zfs list -t snapshot
NAME USED AVAIL REFER MOUNTPOINT
freenas-boot/ROOT/11.2-RELEASE@2018-12-06-13:24:19 1.73G - 1.73G -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201501212031 7.76M - 7.78M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201505130355 7.77M - 7.79M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201506042008 11.1M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201506162331 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201506232120 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201506292332 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201509022158 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201509282017 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201511040813 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201512121950 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201601181840 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201602031011 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201604150515 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-FreeNAS-0a90dd7369b81ac71925bc9d69cb57e0 11.2M - 11.2M -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201605021851 10.3M - 10.3M -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201605240427 10.3M - 10.3M -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201606072003 10.3M - 10.3M -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201606270534 10.3M - 10.3M -
freenas-boot/grub@Pre-Upgrade-9.10.1

Is there any reason to keep the older snapshot around? Should I just destroy the old ones?

 

[Chris Moore]

I used to delete old snapshots after I had a couple of newer ones but I stopped deleting them around three or four years ago because I have plenty of room on my boot pool. So, if you are not running out of room, there is really no reason to delete them, but if you want to delete them, it shouldn't hurt anything. All they are for is to let you roll back to an older boot environment if you find that there is something wrong with a new build.
I would suggest keeping at least two, just to be 'safe'.

 

[umproko5]

see image below ... the GUI doesn't indicate any of the snapshots generated by the console.