NVMe requirements

[YvosOnTheHub]

Page URL

https://docs.netapp.com/us-en/trident/trident-get-started/requirements.html

Page title

Requirements

Summary

Hi,
Trident 24.02 may have issues with NVMe in ONTAP 9.14 when mounting volumes due to the length of the subsystem.
Customers should know about it.
++

here is part of the discussion with the Eng team with some details:

When Trident implemented NVMe driver, the max length of subsystem that ONTAP used was 96 chars and that’s what Trident used. However, ONTAP has changed the max length of NVMe subsystem from 96 chars to 64 chars in 9.14.1.
This ONTAP change breaks the backward compatibility.

For the file system volumes, the NVMe subsystem is a combination of host-node-name and trident UUID . So in this specific case, the name of the subsystem should be “r740xd-1.skc-lab.rd.abcdefghijklm.no + 36 chars of trident UUID = 73 chars

As you can see this would have been fine before 9.14 (as the max length there was 96 char) but for 9.14 it is not and hence the REST call error.

Good thing is that we have already fixed this in Trident and the fix will be available in 24.06.

The user has 3 options:
Wait for the Trident fix in 24.06
Change the node name to something short so that the whole subsystem name is < 64 chars
Try the POC on ONTAP 9.13

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