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check_disk_write.pl (Advanced Nagios Plugins Collection)

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Compatible With
  • Nagios 1.x
  • Nagios 2.x
  • Nagios 3.x
  • Nagios XI
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Checks a disk is writable and functioning properly by writing a tiny canary file with unique generated contents and then reading it back to make sure it was written properly.

Useful to detect I/O errors and disks that have been re-mounted read-only as often happens when I/O errors in the disk subsystem are detected by the kernel.
Part of the Advanced Nagios Plugins Collection.

Download it here:

https://github.com/harisekhon/nagios-plugins

./check_disk_write.pl -d /tmp
OK: canary file I/O written => read back 51 bytes successfully in /tmp, unique contents verified

./check_disk_write.pl --help

usage: check_disk_write.pl [ options ]

-d --directory Directory to write the canary file to. Set this to a directory on the mount point of the disk you want to check
-t --timeout Timeout in secs (default: 10)
-v --verbose Verbose mode (-v, -vv, -vvv ...)
-h --help Print description and usage options
-V --version Print version and exit