Table of ContentsPreviousNextIndex

AMCC


Controller Settings Page

The Controller Settings page appears when you choose Management > Controller Settings from the menu bar.

The Controller Settings page lets you view and change settings that affect the units on the controller specified in the drop-down list on the menu bar.

Background Task Rate

The Background Task Rate fields let you change the balance of background tasks (rebuild and verify) and I/O performed by the controller.

9000-series controllers show separate settings for Rebuild Rate and Verify Rate,. 7000- and 8000-series controllers show only one setting for Task Rate; it applies to both rebuild and verify rates.This rate is not persistent following a reboot for 7/8000.

The 5 radio buttons let you set the ratio at which rebuilds and verifies are performed. The furthest left buttons set the firmware to the fastest rebuild and verify settings. This means, maximum processing time will be given to rebuilds or verifies rather than I/O. The furthest right buttons set the firmware to the slowest rebuild and verify settings, giving maximum processing time to I/O.

For additional information, see 3ware 9000 Series Serial ATA RAID Controller User Guide.

Unit Policies

For units on 9000-series controllers, you can enable or disable two policies: Auto-verify and Continue on Source Error During Rebuild. 3DM lists each unit on the controller specified in the drop-down list on the menu bar, and shows you whether the policies are currently enabled or disabled for each unit.

This section does not appear for 7000- and 8000- series controllers.

Unit Write Cache. You can enable or disable write cache for each unit.3DM lists each unit on the controller specified in the drop-down list on the menu bar, and shows you whether the write cache is currently enabled or disabled for it.

Write cache is a combination of the physical hard drives' write cache as well as the controller's memory, depending on what type of unit you are using.

For 9000-series controllers, a Disable Write Cache on Unit Degrade setting can be set in 3ware BIOS Manager (3BM). You can see if this setting is enabled in the Other Controller Settings field at the bottom of this Controller Settings page. If Disable Write Cache on Unit Degrade is enabled, upon degrade of a unit, the write cache will automatically be disabled, even if you enable write cache in the Unit Write Cache field.

For additional information, see

Auto-verify. The Auto-verify policy causes verify tasks to be performed automatically, whenever the controller firmware algorithms determine that a verify task is needed. This feature is designed to make verification of units easier. When you check this box, the controller will run verify tasks as they are required.

If there is no schedule set up for verify tasks, then the controller firmware can initiate a verify task at any time. If a verify time window is scheduled, then the controller will not start a verify task for that unit outside the time window, and may or may not start a verify task for that unit within the time window, depending on whether one is needed.

If Auto-verify is not set and there is no schedule, you must manually specify when you want to run a verify, on the 3DM Management page.

Continue on Source Error During Rebuild. This policy applies only to units which are redundant. (For units which are not redundant, a check box is not available.) When this policy is set, ECC errors are ignored when they are encountered during a rebuild. When this policy is not set, a rebuild will abort upon encountering an ECC error and the unit will be set back to Degraded.

Since this option could result in the loss of some source data in the event of source errors, select this option only if you want to ensure that a rebuild will complete successfully without manually intervention. If the rebuild fails and Continue on Source Error During Rebuild is not selected, then you have the option to start a rebuild manually. It is recommended that a file system check be executed when the rebuild completes.

Note: The policy Continue on Source Error During Rebuild is equivalent to the "Force continue on source errors" option in 3DM v 1.x and the "ignoreEcc" option in the CLI.

Other Controller Settings

For 9000-series controllers, the Other Controller settings displays information about additional settings that can only be changed in the BIOS (3BM). For more information see 3ware 9000 Series Serial ATA RAID Controller User Guide.

This section does not appear for 7000- and 8000- series controllers.

Number of Drives Per Spin-up. Number of drives that will spin up at the same time when the controller is powered up. (This setting only applies when the feature is supported by the disk drives and has been enabled in 3BM.)

Delay between Spin-ups. The delay time (in seconds) between drive groups that spin up at one time on this particular controller.

Export JBOD (Unconfigured) Disks. Indicates whether unconfigured disks (JBODs) should be exported to the operating system. By default, this setting is disabled and JBOD drives are not exported to the operating system. For more information about this feature, see 3ware 9000 Series Serial ATA RAID Controller User Guide.

Disable Write Cache on Unit Degrade. Indicates whether write cache will be automatically disabled on a unit if it becomes degraded. After the unit is rebuilt, the write cache will be re-enabled automatically.

Related procedures:


AMCC
www.3ware.com
Voice:(408) 523-1000
Fax: (408) 523-1001
email: support@3ware.com
Table of ContentsPreviousNextIndex Copyright (c) 2004, AMCC