3Ware 9550SXU-8LP User Guide - Page 157

Enabling and Disabling Queuing for a Unit

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Setting Unit Policies To set the Continue on Source Error During Rebuild policy in 3BM 1 At the main 3BM screen, select the unit by highlighting it and pressing Enter. An asterisk appears in the left-most column to indicate that it is selected. 2 Tab to the Maintain Unit button and press Enter. 3 On the pop-up menu, select Configure and press Enter. 4 In the Configure Disk Array screen, Tab to the field Continue on Source Error During Rebuild. 5 Press Enter to display the choices, use the arrow keys to select the setting you wan (Enabled or Disabled)t, and press Enter again to choose it. 6 Tab to the OK button and press Enter to select it. You return to the main 3BM screen. 7 When you are finished making changes, press F8 to save them and exit 3BM. Enabling and Disabling Queuing for a Unit Some drives support NCQ (Native Command Queuing), which can result in increased performance for applications that require a lot of random access of data (usually server-type applications). When enabled, NCQ can improve performance; it causes command reordering to be done on the drive, itself. In order to make use of NCQ, the feature must be enabled at both the drive and the controller. You can enable support for NCQ in 3ware 9550SX and 9590SE controllers on a per-unit basis, as described below. You can see whether NCQ is supported and enabled for a particular drive in the Drive Details window. For details, see "Drive Details Window" on page 92. Note: Not all drives support NCQ. If a drive does not support NCQ, the policy setting for the controller is ignored. www.3ware.com 147

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Setting Unit Policies
www.3ware.com
147
To set the Continue on Source Error During Rebuild policy in 3BM
1
At the main 3BM screen, select the unit by highlighting it and pressing
Enter
.
An asterisk appears in the left-most column to indicate that it is selected.
2
Tab to the
Maintain Unit
button and press
Enter
.
3
On the pop-up menu, select
Configure
and press
Enter
.
4
In the
Configure Disk Array
screen,
Tab
to the field
Continue on
Source Error During Rebuild
.
5
Press
Enter
to display the choices, use the
arrow keys
to select the setting
you wan (Enabled or Disabled)t, and press
Enter
again to choose it.
6
Tab
to the
OK
button and press
Enter
to select it.
You return to the main 3BM screen.
7
When you are finished making changes, press
F8
to save them and exit
3BM.
Enabling and Disabling Queuing for a Unit
Some drives support NCQ (Native Command Queuing), which can result in
increased performance for applications that require a lot of random access of
data (usually server-type applications).
When enabled, NCQ can improve performance; it causes command
reordering to be done on the drive, itself.
In order to make use of NCQ, the feature must be enabled at both the drive
and the controller. You can enable support for NCQ in 3ware 9550SX and
9590SE controllers on a per-unit basis, as described below.
You can see whether NCQ is supported and enabled for a particular drive in
the Drive Details window. For details, see “Drive Details Window” on
page 92.
Note:
Not all drives support NCQ. If a drive does not support
NCQ, the policy setting for the controller is ignored.