Quantum Barcode Reader 3.5.1 User Manual

Chapter 6  Managing the File System

Understanding Dynamic Resource Allocation

StorNext User’s Guide

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Stripe Group Movement moves data files off one or more data stripe 

groups onto the remaining data stripe groups in a file system, which frees 

data LUNS so they can be decommissioned or reused. In a similar way, 

the metadata on a single LUN can be moved to a new LUN. StorNext 

provides a Movement Wizard to simplify these processes, which is 

launched when you select Move Stripe Group from the Admin menu on 

the SNFS home page.
During data stripe-group movement, you indicate one or more source 

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

data from the source stripe groups to the remaining stripe groups in the 

file system. All other data stripe groups are targets, allowing an even 

distribution of data across remaining disk resources. During movement, 

the file system is online and read/write operations occur normally, but 

the source data stripe group(s) are in read-only mode (write disabled). 
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. At this point the source LUNs are 

empty and read-only, so there will be no access to them.
Although stripe group and LUN configuration line items must never be 

deleted from a configuration once its corresponding file system has been 

created, marking a stripe group as down allows its LUNs to be relabeled 

and reused. The names of the LUNs in the configuration file can also be 

changed to free up the old names for reuse.
When moving metadata off one LUN onto a new LUN, the file system 

must be stopped. The Movement Wizard allows you to select one source 

and one destination LUN. On completion, the old LUN is relabeled with a 

suffix of .old, and the new LUN is relabeled with the old LUN’s name. 

The old LUN can then be relabeled and reused.
Quantum recommends using the Movement Wizard for Stripe Group 

Movement, but you can also use the command line interface. (For 

information about using the CLI, see 

.)

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.