Seagate MARATHON 810, Product Manual

Page: 37 / 38

Appendix. Compatibility notes
ECC testing
When an ST9816AG performs hardware-based ECC error correction
on-the-fly, the drive does not report an ECC error. This allows ECC
correction without degrading drive performance. Some older drive diag-
nostic programs test ECC features by creating small data errors and then
checking to see if they are reported. These tests, when run on an
ST9816AG, may incorrectly report an ECC detection failure because the
drive hardware corrects the data automatically, avoiding the error rather
than reporting it. This type of report does not indicate a drive malfunction.
Marathon 810 (ST9816AG) Product Manual, August 1995 29