topic How to get NAA PREFIX for LUNs in Cluster and 7 mode. in Software Development Kit (SDK) and API Discussions

How to get NAA PREFIX for LUNs in Cluster and 7 mode.

NASSIM_SEN — Wed, 04 Jun 2025 23:38:18 GMT

Hello,

I need to determine the NAA prefixes for NetApp LUNs; we have two mapped LUNs (for 7 and Cluster mode) but the NAA prefixes are not the same for these LUNs (checked from the VMware view)

I know that the NAA is composed of two items (prefix+serial number to hex😞

- 7 mode mapped LUN: Serial number = 'P3Ku/JlVTFX3' = 50334b752f4a6c5654465833, from VMwaree I see the naa: 60a9800050334b752f4a6c5654465833

- Cluster mode mapped LUN: Serial number = 'RLIta+DhqCVk' = 524c4974612b44687143566b, from VMware I see the naa: 600a0980524c4974612b44687143566b

Now I have two prefixes; 60a98000 for the LUN mapped in 7mode and 600a0980 for the one mapped in Cluster mode.

What is the rule to determine these prefixes? Can I determine the prefixes programmatically ?

We are using the ONTAPI; we need to build the NAA ID for each mapped LUN.

Thanks in advance for your help.

Nassim

Re: How to get NAA PREFIX for LUNs in Cluster and 7 mode.

aborzenkov — Mon, 03 Aug 2015 05:19:05 GMT

0a9800 OUI is not even registered. Something is really strange here. Any chance WWN was previously set manually on 7-Mode system?

Re: How to get NAA PREFIX for LUNs in Cluster and 7 mode.

NASSIM_SEN — Thu, 06 Aug 2015 08:53:18 GMT

Yes,

I can see the NetApp OUI "00A098" in http://standards-oui.ieee.org/oui.txt

But the 0A-98-00 is not found! I have seen another discussion talking about the same issue: http://community.netapp.com/t5/Data-ONTAP-Discussions/Vendor-WWN-OUI-for-NetApp/td-p/46906

0A-98-00 has been generated for an old filer FAS2020.