Burner Question: What does Endtrack Error mean?

[7Words]

i have been getting errors about Endtracks when trying to burn HDD data to CD. i've done Cd to CD and it worked fine b4, but now CD to CD is getting the same errors.

tried burning some mpegs and psx backups.

help would be appreciated

i have an old 2x sony CDRW.

thx