How to manage the root volume

The storage system's root volume contains special directories and configuration files that help you administer the storage system.

The root volume is installed at the factory on FAS systems and on V-Series systems ordered with disk shelves.

Note: For a V-Series system that does not have a disk shelf, you install the root volume on the third-party storage. If you use a FlexVol volume for the root volume, you must ensure that it has a guarantee of volume. For more information about setting up a V-Series system, see the Data ONTAP 7-ModeSoftware Setup Guide.

Unless the installer selected a unique volume name during setup, the default root volume name, /vol/vol0, is used.

You cannot set the root volume's fractional reserve to any value other than 100%.

You can designate a different volume to be the new root volume. Starting in Data ONTAP 8.0.1, you can designate a 64-bit volume to be the new root volume.

The root aggregate contains the root volume. Starting with Data ONTAP 8.1, new systems are shipped with the root volume in a 64-bit root aggregate. The root aggregate should contain only the root volume. You must not include or create data volumes in the root aggregate.

By default, the storage system is set up to use a hard disk drive (HDD) aggregate for the root aggregate. When no HDDs are available, the system is set up to use a solid-state drive (SSD) aggregate for the root aggregate. If you want to change the root aggregate, you can choose either an HDD aggregate or an SSD aggregate to be the root aggregate (by using aggr options aggr_name root), provided that the corresponding type of disk drives is available on the system.

For more information about traditional and FlexVol volumes, see the Data ONTAP 7-ModeStorage Management Guide .