SOLVED Dataset full + deleting files

[-Adam-]

Hi! Apparently I have not read that filling up dataset is a huge problem. Now I can not free up the space. Could you please help me understand a few things:
#1 - most people have problems with deleting files. I have done that over ssh but this has no input on the free space (why?). I have tried replacing file with /dev/null or echo, but it has not input on free space.
#2 - deleting old snapshots helps but I got only around 3GB of free space now.
#3 - the configuration is mirror - at the beginning I had 2x2TB, Couple of moths ago, after one disk was failing i replaced it with 3TB. At the moment dataset is working on: one 2TB and one 3TB drive. Tomorrow I will get brand new 3TB drive. After replacement of 2TB drive with 3TB the system will give me mirror of 3TB - right?

df -h

Code:

Filesystem	  Size   Used  Avail  Capacity   Mounted on
MIRROR_2TB 3.5G  96K	3.5G   0%			  /mnt/MIRROR_2TB

Thanks in advance for your help!
Adam

 

[-Adam-]

Ok, figured it our - snapshots of course! Space was kept in snapshot. Now, everything is back to normal

 

[Spearfoot]

#3 - the configuration is mirror - at the beginning I had 2x2TB, Couple of moths ago, after one disk was failing i replaced it with 3TB. At the moment dataset is working on: one 2TB and one 3TB drive. Tomorrow I will get brand new 3TB drive. After replacement of 2TB drive with 3TB the system will give me mirror of 3TB - right?

You are correct: ZFS will automatically expand the mirror vdev capacity when you replace both drives with larger-capacity drives.

Glad you found the source of the problem: those pesky snapshots that we all both love and hate! :)

 

[-Adam-]

Thanks! Fortunately didn't have to use snapshot to recover files, but better to be safe than sorry.

 

[melloa]

After replacement of 2TB drive with 3TB the system will give me mirror of 3TB - right?

@Spearfoot already answerd, but I'm sure you will benefit from: https://forums.freenas.org/index.ph...ning-vdev-zpool-zil-and-l2arc-for-noobs.7775/