topic Disk replace with different capacity in ONTAP Hardware

Disk replace with different capacity

LORENZO_CONTI — Wed, 04 Jun 2025 14:44:54 GMT

Hello,

maybe this is a trivial question, but I need some advice from experts 😉

I have to replace 2TB ATA disk with 2TB SATA (BSAS on DS4246) disk, on a FAS system in HA (8.3.2 cluster mode), the aggregate is a flash pool.
I would like to not relocate controller, I want to do it non disruptively, and I have 3 spare DS4246 with 3TB drives.
I will leave doing vol move as last option.

Here's what I want to do:

- disk replace 2TB ATA on 3TB BSAS
- disconnect 2TB ATA, connect 2TB BSAS
- disk replace 3TB BSAS on 2TB BSAS

Is it possibile to do this?

Thank you very much

Re: Disk replace with different capacity

AlexDawson — Mon, 14 Aug 2017 04:09:38 GMT

Hi,

This is supported. This article outlines pretty much the exact scenario you're asking about - https://kb.netapp.com/support/s/article/ka31A0000008gtZQAQ/how-to-add-larger-capacity-disks-to-a-raid-group-that-contains-smaller-capacity-disks?language=en_US

Good luck!

Re: Disk replace with different capacity

LORENZO_CONTI — Mon, 28 Aug 2017 15:24:49 GMT

Hi Alex,

I found 2 conflicting bug because I'm not sure about how parity disk will be handled.

https://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=108147

https://mysupport.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=155069

Maybe the higher id will be right...

I'm stil considering vol move as a good option 😉

Re: Disk replace with different capacity

AlexDawson — Wed, 30 Aug 2017 05:10:18 GMT

Both of those BURTS have been resolved and the functionality should work as designed