|
|
Auto Initialization After Power Failure
The 3ware controller detects and handles power failures. This mechanism is intended to ensure that redundant units have consistent data and parity. When a redundant unit is unexpectedly shutdown, there is a possibility some data and parity may be inconsistent. For redundant units, if a unit or sub-unit is detected to have been shutdown uncleanly, the unit or sub-unit will change its mode to either `Initializing' or `Verifying'.
3ware's auto-initialization feature determines if this is required. During driver startup, a flag is set that indicates that the driver loaded. Upon an orderly shutdown, the flag is rewritten, indicating that there was a clean shutdown. During the next system power cycle the firmware queries the flag. If there was a power failure, the flag will indicate that there was not a clean shutdown. This means that the data on the drives may not be correct.
When the initialization is complete, the unit is guaranteed to be redundant again. The initialization does not erase user data.
Related Topics
| AMCC www.3ware.com Direct:(408) 542-8800 Toll Free: (800) 840-6055 email: 3waresupport@amcc.com |
|
Copyright (c) 2004-2006, AMCC |