Quantum 3.5.1 User Manual

Chapter 6  Managing the File System

Performing a Metadata Dump

StorNext User’s Guide

133

Mount the file system as described in 

6

When using affinities, the StorNext administrator must adhere to the file 

system configuration restrictions listed below to ensure that data 

management policies execute properly. These restrictions apply only to 

managed file systems, not to non-managed (SNFS-only) installations. 

• Taking into account all managed file systems, you cannot use more 

than two unique affinity names. However, these two affinity names 

can be re-used across file systems. 

• All data stripe groups must have exactly one affinity association, but 

several stripe groups can be associated to the same affinity. This 

restriction does not apply to exclusive metadata or journal stripe 

groups.

• At least one policy class must be created to use the configured 

affinities. 

Performing a Metadata Dump

This procedure replaces any existing metadata dump data for the selected 

file system, and should be run only if the metadata file has been lost or 

corrupted.

You must designate at least one data stripe group in each 

managed file system as non-exclusive. If you do not make 

this designation, writing to the area of the file system that 

is not associated with any of the affinities will result in an 

out-of-space error.

Deleting affinities from a file system configuration after 

the file system has been in use for a while could result in 
abnormal behavior. Contact the Quantum Technical 

Assistance Center before deleting affinities from a file 

system configuration.