Disk health

• Tools like stress-ng or stressant can also test disks, see ../hardware-testing.md
• See also ./smart.md

Badblocks

• Fix online badblocks reported by smart

Read-Only Mode

badblocks -sv /dev/sdX # readonly
badblocks -svn -p 3 /dev/sdX # Safe read/write mode
fsck.ext3 -c /dev/sdX9  # readonly
fsck.ext3 -cc /dev/sdX9  # Safe read/write mode

RW-Mode

Warning!

badblocks -t random -swv /dev/sdX ; mail -s "Badblocks finished with exit code $?" tostado
badblocks -b 4096 -p 3 -s -v -w /dev/hdX
badblocks -swv /dev/sdX

Speed up badblocks

https://superuser.com/a/798883

time badblocks -svw -b 4096 -c 65536 -t 0 /dev/sdX

Takes ~10h for a 1 TB SATA drive.