17
3.1 Drive Diagnostics
You may determine the performance of drives attached to the FastStream using various displays and tests in
ExpressNAV Storage Manager.
The following instructions assume you have already
set up at least one RAID Group.
The ATTO FastStream collects various metrics to
measure performance for physical drives attached to
the FastStream during normal system operation and
drive initialization and verification.
New performance data is updated every 60 seconds
which impacts performance slightly, even if you
minimize the browser window. Exit the ExpressNAV
Storage Manager completely whenever you need
maximum performance.
Note
Initialize and Verify Drives is Described in
Section 3.0,
Preliminary steps
1
If you are not already in the ExpressNAV
Storage Manager, type the IP address of your
controller in a standard browser. On the splash
screen, click
Enter Here.
In the box provided
,
type in your user name and password, and click
OK
.
2
The
Health and Status Monitor
page appears.
Click the
Diagnostics
button on the left hand
menu.
3
Select the operation you wish to perform from
the next menu presented.
Read-only Drive Test
The
Read-Only Drive Test
performs a non-
destructive scan over the entire surface of each drive
to identify bad areas of the disk drives and determine
read performance. It may be run while data is passing
through the FastStream.
Running this test may negatively impact performance.
Once the
Read-Only Drive Test
has completed,
system operation returns to normal.
To fix errors on disks, use the
Initialize and Verify
Drives
process as described in
1
Follow the instructions in
2
Click the
Read-Only Drive Test
button.
3
Click
Next.
4
If no drives appear in the information box, click
on the
System Scan
button.
If drives are available, click on the drives you
wish to test; the drives are highlighted.
5
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.
If you chose to do a
Read-Only Drive Test
, the
Performance
tab, in the
Drive Performance
and Health
page, appears showing what tests
are running and their results. You may select
other tests to run or continue on to other tasks.