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I see a warning in dmesg about barriers being disabled when mounting my filesystem. What does that mean?

April 26, 2017barriers disabled filesystem mean mounting warning

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I see a warning in dmesg about barriers being disabled when mounting my filesystem. What does that mean?

1 Answer

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Your hard drive has been detected as not supporting barriers. This is a severe condition, which can result in full file-system corruption, not just losing or corrupting data that was being written at the time of the power cut or crash.