Ok, let's start here:

Are you thin provisioning?

If so, it is possible that some other volume on the same aggregate got out of hand.

Do you have OnCommand Unified Manager, OnCommand Performance Manager?

Those might have been able to predict (if you are using cDOT)

--tmac

Tim McCarthy

Principal Consultant

On Sun, Apr 26, 2015 at 8:49 AM, Fletcher Cocquyt <fcocquyt@stanford.edu> wrote:

Never seen this before

FAS3250
ONTAP 8.1.2

at 2am the volume hosting 110 VMs fills up and starts alerting

Get the call and delete several snapshots to take it to 83%, reboot the 110 VMs ;(

I have lots of tools (splunk, inmon etc) they are not able to show why this volume filled up

ideas?

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