Installation manual

22
Creating a Hot Spare Pool
If a member of a RAID group becomes degraded or
fails, you lose some redundancy in your RAID group
until a new member is rebuilt into the RAID group.
You can set up a Hot Spare Pool with drives of different
sizes which are designated as replacements for
faulted devices at any time, either before or after
creating RAID groups.
A degraded RAID group is automatically rebuilt if a
suitable disk is available in the Hot Spare Pool.
1 After following the Preliminary Steps on page
18, find the Hot Spare tab in the bottom panel
within the RAID tab.
2 Select the Hot Spare tab to show existing
members of the Hot Spare Pool.
3 To add drives to the Hot Spare Pool, select
unallocated drives from the top panel and drag
them to the Hot Spare Pool.
To remove a drive from the Hot Spare Pool, select the
drive, click on it and click on
Delete Hot Spares .
Note
An unallocated drive or unallocated storage
is storage which is not part of a RAID group,
not already designated as a Hot Spare or
was offline when you set up a RAID group
using the ATTO ConfigTool.
Modifying RAID Groups
The ATTO ConfigTool interface may be used to
replace a failed drive, add capacity to a RAID group, or
change a RAID configuration from the current
configuration to a new configuration.
CAUTIONCAUTION
Data can be compromised or lost when
deleting storage or rearranging storage
configurations.
The ATTO ConfigTool interface takes you step by step
through many procedures which allow you to modify
your storage and RAID configurations. Read all notes
and cautions carefully as you go to ensure the best
performance and use of your storage. Many of these
procedures are only available using unallocated
storage.
Begin each process by
following the Preliminary
Steps on page 18 and clicking on the desired
process in the RAID Management menu.
Note
An unallocated drive or unallocated storage
is storage which is not part of a RAID group,
not designated as a Hot Spare or was offline
when you set up a RAID group using the
ATTO ConfigTool.
Expand capacity
Click on Expand Capacity in the RAID
Management
menu and follow the on-screen
instructions. Depending on the RAID configuration,
you may need to add more than one device.
CAUTIONCAUTION
Adding drives to an existing RAID group
may adversely impact performance. You
cannot reverse this operation unless you
delete the RAID group.
Change from one RAID level to a new
RAID Level
Changing from one RAID level to another RAID level
is called migration. The following migration levels are
supported:
• JBOD to RAID Level 0
• JBOD to RAID Level 1
• RAID Level 0 to RAID Level 10
• RAID Level 1 to RAID Level 10
Select Migrate RAID in the RAID Management
menu and follow the on-screen instructions.
Delete a RAID group
To delete a RAID group using the ATTO ConfigTool,
click on
Delete Group in the RAID Management
menu and follow the on-screen instructions.
CAUTIONCAUTION
Data can be compromised or lost when
deleting storage or rearranging storage
configurations.