Jails/.wrden-template-standard dataset suddenly appeared?!

[slippyr4]

Hi all,

I am experimenting with freenas at the moment, to see if i like it and it suits my needs.

I've stuck 3 old disks in my n54l microserver. i have 10 GB non ecc ram, and RaidZ1 at the moment. Please, no lectures on raidz1, if i choose to fully switch to freenas I intend to buy 4 brand new disks for a raidz2 array.

I setup my zpool, shares, and I added two jails - one for logitech media server and one for plex. I used the standard template for both.

Everything worked ok.

Then, I attempted to simulate what would happen in the event of a disk failure (NONE of my data matters, I'm just playing at the moment). So I removed one of the disks from the server (they are hot swappable).

I then readded the disk, wiped it and used freenas to "replace" the missing disk, and let resilvering finish. It finished with an error in a file - a log file inside the plex jail dataset.

I removed that plex jail, and the error didn't disappear but the report of the error in zpool status -v changed to a inode number rather than a filename.

So then I triggered a scrub, which completed, and fixed the error.

However, now, in storage, there is a new entry in the dataset list, that was not there before. Under my "jails" dataset, there is one called "Jails/.warden-template-standard".

I can't delete it - i get "cannot destroy 'zpool0/Jails/.warden-template-standard': filesystem has dependent clones use '-R' to destroy the following datasets: zpool0/Jails/squeezebox"

What it is, and why did it suddenly appear?

thanks

slip

 

[Whattteva]

That dataset is a template that first gets built when you first create a plugins jail.
IIRC, when you create a new plugin jail, it will be created from a snapshot of that template dataset. Hence, you cannot delete it until you delete all jails which are dependent on it, which in your case is squeezebox.