topic Fast Zero after upgrade in ONTAP Discussions

Fast Zero after upgrade

ken_foster — Wed, 04 Jun 2025 11:02:04 GMT

The documentation says

"The fast zeroing enhancement does not support systems upgraded from a release earlier than ONTAP 9.4."

is there a way to do a fast zero after upgrading from 9.3 to 9.4 or later?

thanks

Re: Fast Zero after upgrade

Ankitr1 — Mon, 06 Jul 2020 20:06:20 GMT

The fast zeroing enhancement does not support systems upgraded from a release earlier than ONTAP 9.4.

https://docs.netapp.com/ontap-9/topic/com.netapp.doc.dot-cm-psmg/GUID-CB204D28-FE7A-421B-870D-45A4F0D30DE1.html?cp=3_8_2_2

may be this can help

https://docs.netapp.com/ontap-9/topic/com.netapp.doc.dot-cm-cmpr-940/storage__disk__zerospares.html?resultof=%22%66%61%73%74%22%20%22%7a%65%72%6f%22%20

Re: Fast Zero after upgrade

ken_foster — Mon, 06 Jul 2020 20:11:09 GMT

No, thats the command to use if your system does support fast zero.

If you do an upgrade and then run "storage disk zerospares" it does a physical zero, which takes hours.

If you do a new install that same command does a fast zero, unless you use the option "-use-physical-zeroing".

But, thanks for checking in.

Re: Fast Zero after upgrade

aladd — Tue, 07 Jul 2020 07:38:57 GMT

Fast Zero is only enabled during initialization of a controller to ONTAP 9.4 or later.

If the controller was initialized on an earlier release, this option will not be available to the controller after an upgrade to 9.4 or later from an earlier version.

Re: Fast Zero after upgrade

ken_foster — Wed, 08 Jul 2020 12:29:45 GMT

Thats what I figured, and have experienced. I was hoping there was some switch I could set that would allow me to enable fast-zero on upgraded systems. Its too bad, I have hundreds of systems that have been upgraded that I won't ever be able to use fast-zero with.

thank you.