Controller module—additional features, Battery backup unit, Storage array thermal shutdown – Dell PowerVault MD3260i User Manual

Page 22: System password reset

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Item

Indicator, Button, or

Connector

Icon

Description

Off

Indicates that you cannot remove the
expansion module from the system.

Controller Module—Additional Features

Battery Backup Unit

Each controller contains a two-cell Lithium ion nanopolymer battery backup unit (BBU). It provides power to the
controller module in the event of a power outage.

NOTE: For virtual disks, the controller firmware changes the data cache setting based on the state of the battery. If
the battery is missing or does not have sufficient charge, the controller flushes the cache and sets the write cache
attribute to Write Through for all virtual disks. When the battery is replaced, Write Back is re-enabled.

Storage Array Thermal Shutdown

The system automatically shuts down when system temperature exceeds the safe threshold. The battery backup unit
protects against data loss by providing power to offload cache to non-volatile memory in the event of power loss.
Temperature threshold values determine the temperature at which shutdown occurs. These thresholds cannot be
changed.

NOTE: It is not necessary to shut down any expansion enclosures attached to the storage array when thermal
shutdown occurs.

Table 2. Shutdown Threshold Type

Threshold Temperature Exceeding

Event Description

Nominal failure threshold

A critical event is set

Maximum failure threshold

Shutdown of the system power supplies occurs within 3
minutes

Shutdown threshold

Shutdown of the system power supplies occurs within 5
seconds

System Password Reset

To reset the password, push and hold down the password reset switch for at least five seconds. The password is
deleted. You can change the password using MD Storage Manager.
For more information about setting your password, see the

Dell PowerVault MD3260/3260i/3660i/3660f/3060e Storage

Arrays Administrator's Guide

at support.dell.com/manuals.

NOTE: If your system is iSCSI based, you can use the Modular Disk Configuration Utility to reset the system
password.

NOTE: The reset switch can be accessed by using a small object such as the tip of a pen.

22

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