2010-08-19 03:25 AM
I have 4 CSV LUN's for Hyper-v Cluster.
Each volume is 500 GB (thin provisioned), with a 250 GB LUN with space reservation.
I used to have snapshots of the LUN in the volume, however they are all deleted. What I don't understand is why the volume reports 81% used spaced when there is only 1 LUN of 250 GB. My logic tells me 250 GB of 500 GB should be 50%. What is taking up space from 50% to 81%?
So when i go to my Hyper-v Node, start snapdrive and try to resize, I can't resize to more than 380 GB.
Seems very strange to me... Maybe it has something to do with this Fractional option...
Any help is very appreciated.
2010-08-19 04:51 AM
This is weird.
Normally Fractional Reserve has no impact when a volume is thinly provisioned (guarantee set to none). What's your ONTAP version?
On 7.3.2 (& before) FR setting on a thinly provisioned volume was always forced to 100% (& couldn't be changed), yet space consumption within volume (with existing snapshots) worked like FR was actually set to 0%.
Now I am on 7.3.4 & can change FR to 0%, but even with old (100%) setting it had no impact whatsoever.
2010-08-25 11:28 PM