ATTO Technology FastStream VT 5300 Installation And Operation Manual page 16

If a member of a Virtual Tape Library becomes degraded or faulted, you lose some redundancy in your
VTL until a new drive is rebuilt into the VTL. However, Hot Spare drives may be designated as
replacements for faulted drives without intervention by you or a host.
The ATTO FastStream VT replaces degraded or
faulted drives in a VTL without intervention by
you or a host if you set up a pool of Hot Spare
drives of different sizes appropriate for your VTL.
Hot Spares may be set up by the FastStream VT
automatically depending on your choices during
initial setup.
Note
Drives in the Hot Spare pool should be of
appropriate size to the RAID Group so that
smaller drives are not replaced by much larger
Hot Spare devices.
When the ATTO FastStream VT detects a faulted
drive:
• The Controller searches the Hot Spare pool for
the smallest drive of sufficient size to substitute
for the faulted drive.
• The FastStream replaces the faulted drive with
the drive from the Hot Spare pool.
• The FastStream begins an automatic rebuild of
the RAID groups.
Note
A RAID rebuild may take up to two hours to
complete.
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ATTO Technology Inc. FastStream VT 5300 Installation and Operation Manual
2.2 Use Hot Spares
If you are adding Hot Spares using unallocated
drives (ones which were not online during initial
set up), ensure they are properly set up. Refer to
Initialize and verify drives
1
2
3
4
5
6
If you are not already in the ExpressNAV
interface, type the IP address of your appliance,
as found in Use the ExpressNAV interface
page 27, in a standard browser, click Enter
Here and type in your user name and
password.
The Monitor VTL page appears. On the left
hand side menu, click on Manage.
On the splash page, click on the FastStream
VT arrow.
Click on the Add/Remove Hot Spares button
Click on Next.
The Add/Remove Hot Spares page appears.
Follow the on-screen directions. When you
complete your changes, click on Commit.
on page 7.
on