If You Can’t Add LUNs to a Storage Pool
You can’t add a LUN to a storage pool unless the LUN is at least as large as the smallest
LUN you added when you created the pool. You can add a larger LUN, but space
beyond the smallest LUN size isn’t used.
You can only expand storage pools that can be used for user data. You can’t add a LUN
to a storage pool if the storage pool can be used only for journaling and metadata.
To add journaling and metadata storage, add another storage pool that can be used
for journaling and metadata.
Also, Xsan Admin won’t let you to add a LUN to a storage pool if adding the LUN will
fragment the storage pool so much that performance suffers.
To check the common LUN size for a storage pool:
In Xsan Admin, select Volumes in the SAN Assets list and then click disclosure triangles
m
in the list of volumes to show the LUNs in the storage pool of interest. Compare the
listed LUN sizes.
To check the data types a storage pool is used for:
In Xsan Admin, select Volumes in the SAN Assets list and then click disclosure triangles
m
in the list of volumes to show the storage pool of interest. Double-click the storage
pool in the list and look next to “Used For” in the Inspector window.