Effective December 3, NetApp adopts Microsoft’s Business-to-Customer (B2C) identity management to simplify and provide secure access to NetApp resources.
For accounts that did not pre-register (prior to Dec 3), access to your NetApp data may take up to 1 hour as your legacy NSS ID is synchronized to the new B2C identity.
To learn more, read the FAQ and watch the video.
Need assistance? Complete this form and select “Registration Issue” as the Feedback Category.

Software Development Kit (SDK) and API Discussions

ZAPI - Storeage-disk-get-iter - storage-ssd-info


Hi all,


Hope you can help me in this case...

The Partner got a question, for which I couldn’t find any usable information.


ONTap API (v 1.31 cluster):












To the partner, these two values would be sort of in sync, as the lifetime of a ssd would also be related to the number of spares available.


So he  had a look at it’s AFF systems




and see the following




Just a snippet. Some have higher spares used. But what the partner find it weird the wear percent . which is 0, but the spares used percent is 7 or more (on others) percent. Is this expected? Which number is leading? It seems also strange that the SSDs seem to use the spares at a consistent rate, as in, consistent usage across all the SSDs.  Is this also expected behavior? 


Any suggestion is welcome!






percent-rated-life-used represents how much of the life span of the drive, as estimated by the manufacturer, has passed.  For example, if MTBF for the drive is 2 million power on hours, but only 100,000 hours have passed it would show as 5%.  This is independent of the number of spare blocks used/free.


Also note that percent-rated-life-used can be greater than 100.  It is based on the estimated lifespan of the drive from the manufacturer...if the drive lives longer than the estimate it would have a value > 100, but that is not a predictor/indicator of failure.


percent-rated-life-used is a purely informational field, whereas percent-spares-used is important monitoring information since running out of spare blocks would cause the disk to be failed.


Hope that helps.



If this post resolved your issue, please help others by selecting ACCEPT AS SOLUTION or adding a KUDO.
NetApp on Discord Image

We're on Discord, are you?

Live Chat, Watch Parties, and More!

Explore Banner

Meet Explore, NetApp’s digital sales platform

Engage digitally throughout the sales process, from product discovery to configuration, and handle all your post-purchase needs.

NetApp Insights to Action
I2A Banner