HighPoint RocketRAID 1720 - Manual (Page 34)

RocketRAID 1720 Driver and Software Installation
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7 – OCE/ORLM
The RR1720 supports both OCE (online capacity expansion) and ORLM (Online RAID
Level Migration). This allows you to convert a RAID array to another type of RAID
array (ORLM), or add additional space to an existing RAID array (OCE).
The RAID software provides support for these features through a single function,
known as OCE/ORLM.
With the OCE/ORLM function, you can transform an array from one RAID level to
another RAID level and/or resize the array dynamically, even under I/O load.
To perform OCE/ORLM on an array:
1. Highlight the “Management” menu, and select the “Array Management”
function.
2. Highlight the array you want to alter.
3. Click the button on the toolbar or select “OCE/ORLM” command from
the “Operation” menu.
4. The OCE/ORLM window will appear.
5. The interface is very similar to the Array Creation Wizard interface. Select the
type of array you wish to change the existing array into, then set any corre-
sponding parameters (cache/ initialization options, capacity, if relevant).
Notes:
1. You cannot change an array to another type of array with a smaller capacity.
In some cases, a disk may need to be added to the RocketRAID 1720.
2. During the OCE/ORLM procedure, the redundancy level of the array will be
the lowest of the source and target arrays; e.g. if you ORLM a JBOD array to
a RAID1 array, the array will be non-redundant until the procedure is
complete.
3. The OCE/ORLM process can be aborted and continued at later time.
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