No (I can say
this even though I'm about to ask): do you mean an
unrecoverable error, or one that was corrected by the hardware
(as opposed to being corrected by software)? Either way, if the
error was corrected, see my response above.
This is useful -- if you are working with an only copy of a tape
and it is marginal, this lets you record in the recovered image
just which bits could not be reliably read.