Modifying Raid Options; Faststream Process: Adding Or Removing Hot Spares - ATTO Technology FastStream SC 5300 Installation And Operation Manual

Modifying RAID options

You may change Auto-Rebuild and SpeedRead
configurations. Refer to
Creating a custom setup
these features.
1 Follow the instructions in
page 30 and click on the RAID Groups arrow
from the Select User Process box.
2 Click on the Modify RAID Options button.
3 Click on Next .

FastStream process: adding or removing Hot Spares

If a member of a RAID group becomes degraded or
faulted, you lose some redundancy in your RAID
group until a new member is rebuilt into the RAID
group. However, Hot Spare devices may be
designated as replacements for faulted devices
without intervention by you or a host.
You may set up a pool of Hot Spare devices of different
sizes appropriate for your RAID groups.
Hot Spares may be set up by the FastStream
automatically depending on your choices during initial
setup. There are two types of Hot Spares:
• Dedicated: Hot Spares that are dedicated solely
for use with a specific RAID group and may not
be used by any other RAID group
• Global: Hot Spares that may be used by any
RAID group.
Note
Devices in the Hot Spare pool should be of
appropriate size to the RAID group so that
smaller devices are not replaced by much
larger Hot Spare devices, thus wasting
storage capacity.
Drives will be searched for in this order:
1 Search for Dedicated Hot Spare
2 Search for Global Hot Spare (Smallest
available drive of sufficient size)
When the ATTO FastStream detects a faulted device:
• The Controller searches the Hot Spare pool for
the smallest block device of sufficient size to
substitute for the faulted drive.
33
ATTO Technology Inc. FastStream SC Installation and Operation Manual
Step 15 and Step 18 under
on page 14 for details on
Preliminary steps
4 Select the RAID group from the drop down box.
5 Select the options you wish to change.
6 Click on Commit.
7 A warning box appears. In the warning box,
verify that you want to complete the
configuration by clicking on Yes . Clicking on No
on
ends the procedure without making a change.
8 When the process is complete, the Health and
Status Monitor page appears.
• The FastStream replaces the faulted device with
the device from the Hot Spare pool.
• The FastStream begins an automatic rebuild of
the RAID group(s).
Note
A RAID rebuild may take up to two hours to
complete.
1 Follow the instructions in
page 30 and click on the FastStream SC arrow
from the Select User Process box.
2 Select the Add/Remove Hot Spares button.
3 Click Next.
4 Select the drive(s) to be added or removed from
the Hot Spare pool by clicking on the boxes
representing those drives.
5 When you have completed your changes, click
Commit .
6 A warning box appears. In the warning box,
verify that you want to complete the
configuration by clicking on Yes . Clicking on No
ends the procedure without making a change.
7 When the process is complete, the Health and
Status Monitor screen appears.
Preliminary steps on