View Full Version : Checking for bad sectors - any utils?
04-20-2008, 02:19 PM
I just bought a new USB external harddisk.
Just wanted to scan it for bad sectors... seems all the 'diagnostic' software is boot disk related and then doesn't seem to include USB disk.
04-25-2008, 03:17 PM
TechTool will scan a disk sufficiently. Bad sectors are automatically flagged and replaced internally by modern ATA drives. If a drive is to the point where bad sectors aren't being repaired, the drive is ready for replacement.
04-25-2008, 03:24 PM
As a poor man's solution, you can use the dd command line utility to scan the entire disk (and output it to /dev/null). If you get any I/O errors, you know the disk has bad sectors.
You can also use dd to correct bad sectors. Just have it force a write to the exact offset that an error occurred, and it will trip the hard drive's built in sector-reallocation routines.
vBulletin® v3.8.7, Copyright ©2000-2013, vBulletin Solutions, Inc.