fq040205-12 - What are the Different PowerGuard® Modes?
PowerGuard® Technology comes in three models that come with different levels of data protection, namely:
| PowerGuard® Mode |
Features |
| PowerGuard® I - Save Mode |
Flushes Cache Data to Flash, Plus Option for "Instant Erasure"* of Flash Data (External Power Required) |
| PowerGuard® II - Erase Mode |
Save Mode, Plus Option for Power Down Erase |
| PowerGuard® III - Standby Mode |
Erase Mode, Plus Extra Internal Power to Extend Decision Time to Erase or Keep Flash Data |
PowerGuard® III offers the highest level of data protection. It incorporates a 3-position manual switch that is located on the mechanical assembly containing the charge-carrying devices and its associated circuitry.
The different operating modes for PowerGuard® Technology are described below:
Save Mode
This mode causes the storage device to automatically flush all dirty data saved in volatile memory, such as cache memory, to non-volatile memory if the external power to the E-Disk® storage device falls below
approximately +4.7 V during operation of the device. Save Mode is the default mode for all types of
PowerGuard® data protection units, including PowerGuard® II & III.
Power-Down Erase Mode
This mode causes the E-Disk® storage device to erase automatically and irretrievably all data stored in the E-Disk® storage device if external power to the E-Disk® storage device falls below the threshold
voltage.
Instant Erase Mode
When activated, all normal operations of the E-Disk® storage device will cease and all data in the entire
E-Disk® storage device will be immediately and irretrievably erased regardless of whether the PowerGuard® unit is in the Save or Power-Down Erase mode. The PowerGuard® I and II versions will not operate correctly if the Instant Erase mode is activated after external power is removed from the E-Disk® drive unit.
With PowerGuard® III, activation of the Instant Erase mode will immediately and completely erase all stored data when the PowerGuard® unit is placed in Standby Mode as long as sufficient energy is still available in the super capacitors.
Standby Mode
Standby mode allows the disk to be removed from the external power source and transported for an extended amount of time, while maintaining the ability to erase all the non-volatile memory upon activation of an easily accessible push button switch.
RELATED DOWNLOAD(S):
White Paper: BiTMICRO E-Disk® PowerGuard® Technology Features
White Paper: BiTMICRO E-Disk® Data Sanitization using securErase®
User Manual: PowerGuard® Technology
| Article ID: |
fq040205-12 |
| Creation Date: |
26 April 2004 |
| Last Reviewed Date: |
14 September 2006 |
| Revision No.: |
1.0 |
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