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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.
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