Snapshot Questions?

[maglin]

So I did some moving around of datasets today along with cleaning up some old snapshots. I learned about
zfs list -t snapshot and it shows a lot of boot env snapshots that I deleted in the GUI long ago. Is it ok for me to destroy them? I'm pretty sure the answer is yes but since it's my boot env I thought I would ask as I didn't find anything when searching the forum. Most results about boot snapshots are upgrade failures or something wrong with a USB drive. Here is what I have in both the GUI and my output.

Code:

maglin@freenas:~ % zfs list -t snapshot
NAME                                                                     USED  AVAIL  REFER  MOUNTPOINT
Data1/jails/.warden-template-standard@clean                               80K      -  1.59G  -
Data1/jails/media@after_move                                            25.6M      -  23.8G  -
freenas-boot/ROOT/9.10-STABLE-201606072003@2016-06-12-01:45:06           270M      -   495M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2015-07-08_17:08:25                25.5K      -  6.78M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2015-07-08_17:36:46                25.5K      -  6.78M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2015-07-08_17:43:26                  26K      -  6.78M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2015-07-08_18:31:06                  26K      -  6.78M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2015-08-09_14:16:44                  26K      -  6.78M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2015-08-10_07:06:27                26.5K      -  6.78M  -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201509160044           27.5K      -  6.79M  -
freenas-boot/grub@Pre-Upgrade-FreeNAS-9.3-STABLE-201509282017           6.77M      -  6.79M  -
freenas-boot/grub@Pre-Upgrade-FreeNAS-d1851bb004ead848f18f828f8fd48bae  6.77M      -  6.79M  -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201603252134                  6.32M      -  6.33M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2016-03-27_14:35:16                  28K      -  6.33M  -
freenas-boot/grub@Pre-Upgrade-Wizard-2016-03-27_14:40:53                27.5K      -  6.33M  -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201604111739                  28.5K      -  6.33M  -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201604140622                  6.31M      -  6.33M  -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201605240427                  6.31M      -  6.33M  -
freenas-boot/grub@Pre-Upgrade-9.10-STABLE-201606072003                  6.32M      -  6.33M  -

 

[jgreco]

I don't think those are actual boot environments, it looks more like configuration information for grub.

You should be fine, but of course the smart course of action would be to download your configuration, twiddle with them, and then try a reboot to make sure you're still good.

 

[jgreco]

Also, if it's leaving cruft laying around, that might be a bug, so you might want to see if it's been reported, and/or report it yourself.

 

[maglin]

Thank you. I'll check it out today and report it if not already reported.

 

[titan_rw]

Already reported:

https://bugs.freenas.org/issues/7451