VDMFEC implements Block ECC using a Forward Error
Correction (FEC) code based on Vandermonde (VDM)
matrices in GF(2^8) due to Luigi Rizzo. Given the
FEC parameters K and N, with N greater than K, N
blocks are written for every K input blocks in
such a way that any K blocks are sufficient to
reconstruct the data. That is, up to N - K blocks
out of every group of N blocks may be lost without
loss of data. VDMFEC's primary application is
intended to be in recovering data from unreliable
media such as diskettes. With appropriate
parameters, files may be recovered even with many
read errors. (Note that you must write the data to
the diskette using this program in order to be
able to recover the data later!)
