\(
\newcommand{\P}[]{\unicode{xB6}}
\newcommand{\AA}[]{\unicode{x212B}}
\newcommand{\empty}[]{\emptyset}
\newcommand{\O}[]{\emptyset}
\newcommand{\Alpha}[]{Α}
\newcommand{\Beta}[]{Β}
\newcommand{\Epsilon}[]{Ε}
\newcommand{\Iota}[]{Ι}
\newcommand{\Kappa}[]{Κ}
\newcommand{\Rho}[]{Ρ}
\newcommand{\Tau}[]{Τ}
\newcommand{\Zeta}[]{Ζ}
\newcommand{\Mu}[]{\unicode{x039C}}
\newcommand{\Chi}[]{Χ}
\newcommand{\Eta}[]{\unicode{x0397}}
\newcommand{\Nu}[]{\unicode{x039D}}
\newcommand{\Omicron}[]{\unicode{x039F}}
\DeclareMathOperator{\sgn}{sgn}
\def\oiint{\mathop{\vcenter{\mathchoice{\huge\unicode{x222F}\,}{\unicode{x222F}}{\unicode{x222F}}{\unicode{x222F}}}\,}\nolimits}
\def\oiiint{\mathop{\vcenter{\mathchoice{\huge\unicode{x2230}\,}{\unicode{x2230}}{\unicode{x2230}}{\unicode{x2230}}}\,}\nolimits}
\)
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 /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. Select from [random,
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
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