Administrator Guide

When a scrub is complete, event 207 is logged and specifies whether errors were found and whether user action is required. Enabling

background disk group scrub is recommended.

NOTE: If you choose to disable background disk group scrub, you can still scrub a selected disk group by using Action >

Disk Group Utilities.

Configure background scrub for disk groups

1. In the System topic, choose Action > Advanced Settings > System Utilities.

2. Set the options:

• Either select to enable, or clear to disable the Disk Group Scrub option. This option is enabled by default.

• Set the Disk Group Scrub Interval (hours) option, which is the interval between background disk group scrub finishing and

starting again, from 0 through 360 hours. The default is 24 hours.

3. Click Apply.

Configuring background scrub for disks not in disk groups

You can enable or disable whether the system continuously analyzes disks that are not in disk groups to find and fix disk errors. The

interval between background disk scrub finishing and starting again is 72 hours. The first time you enable this option, background disk

scrub will start with minimal delay. If you disable and then re-enable this option, background disk scrub will start 72 hours after the last

background disk scrub completed.

Enabling background disk scrub is recommended for SAS disks.

Configure background scrub for disks not in disk groups

1. In the System topic, choose Action > Advanced Settings > System Utilities.

2. Either select to enable, or clear to disable the Disk Scrub option. This option is disabled by default.

3. Click Apply.

Configuring utility priority

You can change the priority at which the Verify, Reconstruct, Expand, and Initialize utilities run when there are active I/O operations

competing for the system’s controllers.

Change the utility priority

1. In the System panel, choose Action > Advanced Settings > System Utilities.

2. Set the Utility Priority option to either:

• High. Use when your highest priority is to get the system back to a fully fault-tolerant state. This causes heavy I/O with the host

to be slower than normal. This value is the default.

• Medium. Use when you want to balance data streaming with data redundancy.

• Low. Use when streaming data without interruption, such as for a web server, is more important than data redundancy. This

enables a utility such as Reconstruct to run at a slower rate with minimal effect on host I/O.

3. Click Apply.

Enabling or disabling managed logs

You can enable or disable the managed logs feature, which allows log files to be transferred from the storage system to a log-collection

system to avoid losing diagnostic data. For an overview of the managed logs feature, including how to configure and test it, see About

managed logs.

Using maintenance mode

Enabling maintenance mode prevents SupportAssist from creating support tickets during planned system downtime.

An ME4 Series storage system automatically enters maintenance mode during a user-initiated restart of a controller or during a firmware

update. When the controller restart or firmware update is complete, the ME4 Series storage system automatically exits maintenance

mode.

Working in the System topic