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Using the Dynamic Resource Allocation Feature
StorNext User’s Guide 345
Use the following procedure to move a metadata/journal stripe group
from a source LUN to a destination LUN.
1 Stop the File System Manager (FSM) for the file system.
2 If your StorNext configuration includes a failover environment, you
must shut down any standby FSMs that would start when you shut
down the primary FSM. The movement procedure will not complete
successfully unless all FSMs are shut down.
3 (Optional) Run the cvfsck command on the file system. See C
hecking
the File System.
4 Run sndiskmove <source-LUN-label-name> <destination-LUN-label-
name>
where <source-LUN-label-name> is the source stripe group from
which the move starts, and destination-LUN-label-name is the
destination stripe group to which you want to move data.
During the move process StorNext appends “.old” to the source
stripe group name. This is to avoid confusion because the destination
stripe group is given the same name as the original stripe group. Both
stripe group names remain in the configuration file.
Caution: The metadata/journal stripe group you want to move
cannot contain data.
Sndiskmove 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
movement cannot contain data.
If you attempt to move a metadata/journal stripe group
that contains data, data loss could occur.
Caution: If you do not shut down standby FSMs, file
system corruption or data loss could occur.