On Sat, 29 Aug 2020 at 13:00, Long Wind <longwind2@yahoo.com> wrote: Subject: how to test disk for bad sector > i believe hard disk has bad sector # smartctl -t short /dev/<device> # smartctl -t long /dev/<device> # smartctl -l selftest /dev/<device> Documentation: https://wiki.archlinux.org/index.php/SMART https://en.wikipedia.org/wiki/S.M.A.R.T.