Quantum Tool Storage 6-01658-02 User Manual

Chapter 6  Managing the File System

Understanding Dynamic Resource Allocation

StorNext User’s Guide

142

6

Stripe Group Movement accomplishes two purposes: moving data files 

between stripe groups, and freeing stripe groups so they can be removed 

from an existing StorNext file system.
Before movement, the stripe group should be in read-only mode (write 

disabled). 
During Stripe Group Movement, you indicate one or more source stripe 

groups from which to move data. StorNext then automatically moves all 

data of the same type (either data or metadata,) from the source stripe 

groups to the remaining stripe groups in the file system. All other stripe 

groups are targets, allowing an even distribution of data across 

remaining disk resources. During movement the file system is left online 

and read/write operations occur normally. 
After all data has been removed from the source stripe group, you must   

mark the stripe group as “down,” which prevents new data from being 

written to the source stripe group. If desired, a system administrator can 

then remove the source stripe group from the StorNext configuration, or 

use the disks in other file systems.
StorNext provides a Movement Wizard to simplify the process. Quantum 

recommends using this wizard for Stripe Group Movement, but you can 

also use the command line interface. (For information about using the 

CLI, see 

6

Here are the steps required for expanding a file system and moving stripe 

groups:

Check the file system before you begin. (See 

Expand the file system. (See 

Move data stripe groups or metadata/journal stripe groups. (See 

 on page 152.)

After expansion you must perform a metadata dump. The File 

Expansion Wizard includes an option that will do this for you 

automatically, but the process can take longer than if you do 

the metadump manually.