User manual

mAnAge diSk ArrAyS
You can also use the Management Interface to change the
configuration of an existing disk array:
1. From the Storage tab, click the Disk Array menu item. A list of disk
arrays will appear on the panel.
2. Move your pointer over a disk array to show the available options:
View, Settings, Locate, and Delete.
• Click View to display information about a disk array, or click
Settings to change its configuration. The table below explains the
meaning of each item in the information panel.
• Click Locate to identify physical drives. This feature will make the
status LEDs blink for one minute on all physical drives used in the
disk array.
• Click Delete to remove an array. If you choose this option it will be
necessary to confirm the deletion in a new dialog. Click Confirm
to delete the array or Cancel to keep it.
Note: If logical drives and a file system have been set up, it may be
necessary to delete the file system and logical drive before the disk
array can be removed.
Disk Array
Information Description
Disk Array ID
Disk array identifier: DA0, DA1, DA2, etc.
Alias
This is the alias assigned through the Disk Array
Settings menu.
Operational Status
Displays the current state of the disk array.
Media Patrol
Indicates whether Media Patrol is enabled or
disabled.
PDM
Indicates whether Predictive Data Migration is
enabled or disabled.
Power Management
Indicates whether power management is enabled
or disabled.
Total Capacity
Displays the total storage capacity of the disk array.
Configurable
Capacity
Displays the total usable capacity of the disk array.
Free Capacity
Displays the unallocated capacity of the disk array.
Max Contiguous
Free Space
Displays the unused capacity of the disk array in
contiguous sectors.
Number of
Physical Drives
The number of physical drives in the disk array.
Number of
Logical Drives
The number of logical drives in the disk array.
Storage > Disk Array
diSk ArrAy problemS
Problems typically result from a physical drive failure, such as a
degraded or offline disk array. The RAID controller can rebuild a disk
array that has become degraded. A more serious but less common
problem is an incomplete array, which results from a physical drive
that fails or goes offline during RAID level migration or disk array
transport.
diSk ArrAy degrAded
Disk arrays are made up of physical drives; logical drives are created
on disk arrays. When a physical drive in a disk array fails, three
things happen:
• The operational status of the disk array becomes Degraded.
• The operational status of the logical drive becomes Critical.
• The operational status of the physical drive becomes Dead
or Offline.
diSk ArrAy oFFline
When a disk array and its logical drives go offline, data stored
in the logical drives becomes inaccessible. Logical drives based
on fault-tolerant disk arrays (RAID 1, 5, 6, or 10) go offline when
two physical drives are removed or fail. Logical drives based on
non-fault tolerant disk arrays (RAID 0) go offline when one
physical drive is removed or fails.
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