B&R 5PP551.0573-00, User Manual

Page: 205 / 253

Accessories • CompactFlash cards
Chapter 5
Accessories
Power Panel 500 User's Manual V 1.00 205
If the data carrier is 80% full with files, then only 20% can be used for wear leveling.
The lifespan of the CompactFlash card is therefore dependent on the amount of unused flash
blocks.
3.2.2.3 Static wear leveling
Static wear leveling also monitors which data is rarely changed. From time to time, the con-
troller then moves this data to blocks that have already been frequently programmed in order
to prevent further wear on those cells.
3.2.3 ECC error correction
Bit errors can be caused by inactivity or when a certain cell is operated. Error Correction Coding
(ECC) implemented via hardware or software can detect and correct many errors of this type.
3.2.4 Maximum reliability
CompactFlash cards used by B&R use SLC flash blocks and static wear leveling together with
a powerful ECC algorithm to provide maximum reliability.