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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):

 

 00.png

 

storage-ssd-info

 

01.png

 

And

 

02.png

 

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

 

03.png

 

and see the following

 

004.png

 

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

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

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