ontap - actual SSD capacity

Question

When I'm  trying to check the  actual SSD storage behind ONTAP FSx it show less capacity then expected:

New ONTAP FSx 4TB - no data, only svm and volume are created.

```
Fsx.....::> vserver show-aggregates 
                                       Available
Vserver        Aggregate      State         Size Type    SnapLock Type
-------------- -------------- ------- ---------- ------- --------------
svm01          aggr1          online      3.36TB ssd     non-snaplock

```
What I'm missing ? Does it reserve some SSD space for other operations ?

Thanks

--Alex

Accepted Answer

Hi Alex,

There are some overheads in ONTAP which mean you don't get the full raw capacity of the disk as available space in an aggregate.

Have a read of the link below, which explains various overheads and sizing considerations for NetApp ONTAP.

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Space_Usage

ontap - actual SSD capacity

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