Expand Capacity; Methods - Fujitsu FibreCAT S80 Manual

Appendix

Expand Capacity

Methods

There are three methods to add capacity to a given FibreCAT S80 system:
a) Adding new groups (and LUNs) on the new HDDs, independently
from the existing configuration
Advantage: Quick expansion, best performance due to independent
disks
New Disk
New LUN
b) Adding a new LUN by expanding an existing group
Advantage: Saves disks because in RAID 5 only one parity disk is required
c) Enlarging an existing LUN
Depends on OS / only possible if there is a single LUN in a group
64
Group
Old LUN 1
New LUN
new Group
New LUN
larger Group
larger LU N 1
larger Group
Old Group
Old LUN 1
Old LUN 2
Old LUN 1
Old LUN 2
Old LUN 1
U41578-J-Z875-1-76