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Root volume size and space guarantee requirements

About the size requirement for root FlexVol volumes  Top

In contrast with traditional volumes, it is possible to create a FlexVol volume that is too small to be used as the root volume. The root volume must have enough space to contain system files, log files, and core files. If a system problem occurs, these files are needed to provide technical support.

Data ONTAP prevents you from setting the root option on a FlexVol volume that is smaller than the minimum root volume size for your storage system model, and prevents you from resizing the root volume below the minimum allowed size.

Minimum size for root FlexVol volumes  Top

The minimum size for a root FlexVol volume depends on your storage system model. The following table lists the minimum allowed size for root volumes.

Storage system model

Minimum root FlexVol volume size

FAS250

9 GB

FAS270, FAS270c

10 GB

FAS920, FAS920c

12 GB

FAS940, FAS940c

14 GB

FAS960, FAS960c

19 GB

FAS980, FAS980c

23 GB

FAS3020, FAS3020c

12 GB

FAS3050, FAS3050c

16 GB

R100-12TB

13 GB

R100-24TB

19 GB

R100-48TB

30 GB

R100-96TB

53 GB

R150

19 GB

R200

19 GB

Root FlexVol volumes and space guarantees  Top

A root FlexVol volume must have a space guarantee of volume. Data ONTAP prevents you from setting the root option on a FlexVol volume that does not have a space guarantee of volume, and prevents you from changing the space guarantee for the root volume.

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