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\newcommand{\Kappa}[]{Κ}
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Badblocks is a tool for detecting bad blocks in your hard disk.
Usage
The following will write to every block and read back to identify the number of bad blocks.
This is a destructive test.
ETA is approximately 1 day per 4 terabytes.
badblocks -wsv -b 4096 -t 0x55 -o badblocks.txt /dev/sdg
-w do a destructive write test-s show progress-v verbose-b num block size. Use 4096 typically.-p num do num iterations. Typically 1 is sufficient.-t test_pattern Test pattern. Can be random. E.g. 0x55-o file output badblocks to a file
To save the list of bad blocks, you need to run e2fsck or mkfs.ext4:
sudo e2fsck -fcck /dev/device
-f force check-cc non-destructive write test-k add bad blocks to bad blocks list
mkfs.ext4 -cc /dev/device
Resources
