topic The root volume (/mroot) is dangerously low on space. in ONTAP Discussions

The root volume (/mroot) is dangerously low on space.

ANSHUL_JAISWAL — Thu, 05 Jun 2025 05:49:32 GMT

I am getting the following error message :

The root volume (/mroot) is dangerously low on space (<10MB). To make space

available, delete old Snapshot copies, delete unneeded files, and/or expand the

root volume's capacity. After enough space is made available, reboot this

controller. If needed, contact support personnel for assistance.

I am getting this warning when I am trying to login to the cluster.

I have deleted all snapshots, nosnap is ON for all volumes, also snapautodelete is ON.

I am getting this error after each 2-3 days. I dont understand why the volume is getting full each time.

Now, this time I have no snap shot for any volume, I dont know what to delete to free the volume.

I tried to increase the aggregate size by adding disks to it so that I can increase volume size, but I am unable to do that because failed to add disk to aggregate.

Could anybody let me know the steps to increase the aggregate size and volume size.

Re: The root volume (/mroot) is dangerously low on space.

HARI_KRISHNA981 — Fri, 15 Nov 2013 08:05:00 GMT

Hi anshul,

can you give me the version, mode of ontap and fas model series

Regards,

Hari.

Re: The root volume (/mroot) is dangerously low on space.

sscott — Sun, 17 Nov 2013 14:55:44 GMT

Do one of the things it asks you. For example, delete old snapshot copies:

Enter node level -- node run local

snap list vol0

snap delete -a vol0

Repeat these on all nodes which are complaining, and reboot each one.

In the future, think about snapshot autodelete for vol0, or in a non-production environment simply turn off snapshot schedule for vol0 (snap sched vol0 0 0 0)