After ONTAP Upgrade, space got reduced by 80TB across AFF/FAS nodes | NetApp | Page 1

sturdy breach Jan 13, 2025, 8:13 PM

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We performed ONTAP upgrade from 9.11.1p11 to 9.14.1p9, as the result, the space got reduced by 80TB which is >7% of our used space. Are you aware of any reasons?

Upon ONTAP release notes, I found an enhacement below in 9.12.1:

• Storage capacity enhancements WAFL Space Reservation has been significantly reduced, providing up to 400 TiB more usable capacity per aggregate.

Could it be the reason? 400TB may be a maximum. Is there any way can we figure out how much really we can gain based on the size of an aggregate?

acoustic pulsar Jan 13, 2025, 9:18 PM

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what do you mean "space got reduced"? You should have more free space after the upgrade (and the same space reported as used)

ocean nova Jan 13, 2025, 9:18 PM

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Aggrs above 30TiB size have 10% WAFL reserve before 9.12.1 on AFF (9.14.1 with FAS). Beginning with 9.12.1 (9.14.1) only 5% is being used.

acoustic pulsar Jan 13, 2025, 9:19 PM

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yeah, that increases space, not decreases it. That's why I'm confused 🙂

ocean nova Jan 13, 2025, 9:19 PM

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Where do you see the "400 TiB more usable capacity per aggr" claim? It should be a typo because at most 40TiB is possible for 800TiB aggrs.

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Read this: https://www.netapp.com/blog/free-up-storage-capacity-upgrade-ontap/

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Ah from here, that's a typo: https://docs.netapp.com/us-en/ontap/release-notes/index.html#ontap-9-12-1-highlights

ONTAP 9 release highlights

Learn about the new capabilities available in ONTAP 9.

acoustic pulsar Jan 13, 2025, 9:23 PM

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ocean nova Ah from here, that's a typo: https://docs.netapp.com/us-en/ontap/release-notes/i...

nicely spotted...

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feel free to report it 😉

ocean nova Jan 13, 2025, 9:28 PM

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already done 🤓

solemn perch Jan 13, 2025, 10:11 PM

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If you’ve got ASUP turned on and would like me to take a look, please message me with system serial and cluster name.

#After ONTAP Upgrade, space got reduced by 80TB across AFF/FAS nodes