CF Cards, status register, consequences of CORR bit?

Hi Group

The CompactFlash specification (section 6.1.5.9 in the CF2 specs)
denotes the CORR bit in the status register. Acording to the specs,
the bit is set "when a Correctable data error has been encountered and
the data has been corrected."

A subsequent write to a sector showing this behaviour make the bit go
off (seem to correct the "problem").

So far so good, but every now and then I encounter this condition in
the field with a smal percentage of installations. This rises the
following questions:

- Does this indicate a wear out of the card or is it just something
that might happen but otherwise can be ignored?

- What worries me is that if I place a card that showes this bit set
with a given sector in a PC CF card reader, the PC seem to look at
such sectors as bad and the read operation results in a read error.
However, as the specs state, if I read this sector with my embedded
system, the sector data is just fine.

- Does the fact that a subsequent write fixes the problem mean that
the flash memory area afected was hot swaped by the device?

- I use a FAT filesystem on the card, should I therefore copy the data
from the affected cluster to a new one and mark it bad (provied it's a
serious issue and the card does not swap it internally)?

- Does the ocurance of this mean a soon to be expected complete
failure of the card? That would be odd in that I also experienced this
with cards being virtually new...

TIA

Markus