Quantum Marine Sanitation System 3.5.2 User Manual

Chapter 6  Managing the File System

Performing Stripe Group Movement

StorNext User’s Guide

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Although the Movement Wizard focuses primarily on data movement, 

you can also move metadata stripe groups. You can move a metadata 

stripe group to a new stripe group of the same or greater capacity as the 

original metadata stripe group. However, during metadata stripe group 

movement the file system must be down, and no new read/write 

operations can occur until all metadata has been transferred and the file 

system is restarted. The exact amount of downtime is based on the disk 

size.

For movement purposes, StorNext treats metadata and journal stripe 

groups the same way, so it doesn’t matter whether the stripe group you 

want to move is a metadata stripe group, a journal stripe group, or a 

combined metadata and journal stripe group. The only caveat is that 

stripe groups used for metadata/journal move cannot contain data. 

(StorNext has different mechanisms for moving data stripe groups versus 

metadata/journal stripe groups.) 

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Use the following procedure to perform stripe group movement.

From the SNFS home page, choose Move Stripe Group from the 

Admin menu. The Move Stripe Group screen appears, showing the 

following information for completed moves and moves in progress: 
• File System: The name of the file system involved in the move

When moving a metadata stripe group, the Movement Wizard 

shuts down the file system. Depending on the number and 

size of files in your system configuration, metadata movement 

could take a long time, so plan accordingly.

After data movement is complete, you must mark the source 

stripe group as “down.”

During Stripe Group Movement, affinities are preserved when 

files are moved from one stripe group to another. 

Consequently, there must be sufficient space on one or more 

destination stripe groups for any affinities on the source stripe 

group. (You must add any affinities from the source stripe 

group to the new stripe group.)