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Administering the Array
Increasing Array Capacity
Mylex On-line RAID Expansion (MORE) is a dynamic RAID set expansion
feature which allows the addition of drives (capacity) to a given RAID set while
the controller is on-line with the host. MORE accommodates expansion on
RAID 0, RAID 1, RAID 3, RAID 5, and RAID 0+1 (RAID 6) arrays.
The added capacity that becomes available upon completion of data migration can
be treated in one of two ways:
NOTE:
To begin increasing the capacity:
1
80
Increasing Array Capacity
Add System Drive – this option retains the size of the original (defined)
system drive, and restripes the system drive's data across a larger number of
drives. After restriping, new unused space becomes available which can be
used to define one or more additional system drives, not exceeding a
maximum of eight for both new and previously-defined system drives.
Enlarge System Drive – this option appends the added capacity to the
system drive specified for expansion in the Increase Capacity request. This
option can only be selected when only one system drive is defined on the
set of physical drives undergoing expansion. If more than one system drive
exists on the same set of drives, you must use the Add System Drive option.
MORE is supported only in the single controller (simplex) operating
mode. A dual-active system can be put into simplex mode by using the
Kill Partner option on the Administration menu. Then the Increased
capacity function can be selected from the Configuration menu while
forced simplex is in effect. Return to duplex mode by using Relinquish
Partner.
Select Increase Capacity from the Configuration menu. The Increase Capacity
screen appears, showing information on the left side of the screen and the
defined sequenced steps on the right.
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