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StorView RAID Module
106
3
Scroll down and choose the specific array that became critical from the removed/failed drive.
4
A confirmation window will appear indicating the successful execution of the command, click the
CLOSE
button.
5
Click the
CLOSE
button on the Drive Information window.
Important
For a RAID 6 rebuild operations, if two (2) drives fail, and a rebuild is started after replacing both
disk drives, only one drive rebuild is performed at a time. This means one drive will be rebuilt then
the second drive rebuild will be started.
You can monitor the rebuild operation from the Main screen
10.2.6 Expanding an Array
Caution
You must stop all host I/O operations prior to deleting an array.
Important
RAID 6 disk arrays do not support array expansion.
The Expand Array feature is used to increase the capacity of an existing array. An array can be expanded
to a maximum of 16 drives. Only one array can be expanded at a time.
Note
No configuration changes can be made to the arrays, logical drives, or SAN LUN Mapping while an
expansion operation is in progress.
During the expansion process, data is re-striped across a new set of data drives, and new parity is
calculated and written if necessary for fault tolerant arrays. If the array is a fault tolerant array, such as
RAID level 1, 10, 5, or 50, it will remain fault tolerant during the expansion.
Should a disk drive fail in a fault tolerant array during the expansion, the expand operation will continue
as normal at which time it will flag the drive as failed and use the data and parity information to create the
new data and parity stripe. After the expansion is complete, and if you had a hot spare designated, the
automatic rebuild operation will commence bringing the non-fault tolerant expanded array back to a fault
tolerant condition.
If a second drive failure occurs during expansion, that condition is not recoverable and you will have a
total loss of data. You may wish to consider backing up the data prior to expanding an array. Although
there is a level of protection during this operation without the backup, the best insurance is a valid backup.
Note
After the array expansion process has completed, if you are expanding for the purposes of new drive
space you will need to create the appropriate logical drive(s) and define them in your operating system.
However, if the expansion is intended to increase the existing logical drive capacity you will need to
perform a LUN Expansion. Afterwards a third-party volume/partition software product will be necessary
to manipulate any existing partitions.
1
Stop all host I/O operations.
2
On the Main screen locate and click on the
<Array_Name>
you wish to expand. This will open the Array
Information window.
3
From the Array Information window, click the
Expand Array
tab,
see Figure 10–10 ”Expand Array Tab
Selected” beginning on page 107.
Summary of Contents for 131018 - StorView Snapshot - Mac
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