Why it's not recommended to set the ''guarantee'' to ''file''

[Ashun]

Hi all,

I'm still pretty new to  Data Ontap and have the following doubt:

I'm having a problem creating FlexVol and understand setting 'guarantee' to 'volume' and 'none', but don't understand why it's not set to 'file'

[Sergey_Osipov]

space guarantee on the volume level can be either volume or none.

as the file guarantee is no longer supported for a very long time

where "none" means thin volume 

and "volume" means thick

in other words

A value of volume reserves space on the aggregates for the entire volume. A value of none reserves no space on the aggregates, meaning that writes can fail if an aggregate runs out of space. 

[Ashun]

Thanks，i get it

Can you help me with another question？

if i create a 500G volume with a guarantee type of file  

Whether space is reserved in the aggregate

If space was reserved, how much was reserved?

[Sergey_Osipov]

I'm not sure why you are still talking about file type of guarantee

If I remember correctly it existed in 7-mode we we recommended not to use it

If I'm right and you are talking about 7-mode
please take a look on this document
https://www.netapp.com/pdf.html?item=/media/19678-tr-3965.pdf