Program to check and examine hard drives for errors and attempt to "fix" them

[andreas85]

You can find good Information about Btrfs in the wiki

Btrfs

And please also have a look at:

Home Directory is ReadOnly (NotWritable)

This is a clear warning that the device has massive problems! The last time I ignored such warning signs, it cost me more than 100€ for data recovery. It was still a spinning disk though. Since then I’ve been healed! Since you are the admin: Don’t repair, replace ! Most other file systems would only have reported this when data had already been lost! Because BTRFS writes (and checks) checksums, it notices the error IMMEDIATELY. BTRFS will not allow you to write more data to a …

There btrfs indirectly provided indications of a faulty RAM

You may repair damaged filesystems, BUT:

Do not repair damaged disks !

Replace them !