topic ZAPI - Storeage-disk-get-iter - storage-ssd-info in Software Development Kit (SDK) and API Discussions

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

Farhang_Malek — Wed, 04 Jun 2025 20:12:47 GMT

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):

storage-ssd-info

And

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!

Cheers,

Farhang

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

asulliva — Tue, 28 Jun 2016 13:28:55 GMT

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.

Andrew