ST posted on Wed, 22 Nov 2017 21:54:10 +0200 as excerpted: > Hello, > > I have following cron job to scrub entire root filesystem (total ca. > 7.2TB and 2.3TB of them used) once a week: > /bin/btrfs scrub start -r / > /dev/null > > Such scrubbing takes ca. 2 hours. How should I get notified that a > corrupt file was discovered? Does this command return some error code > back to cron so it can send an email as usual? Will cron wait 2 hours to > get that code? > > I tried that command once without "> /dev/null" but got no email > notification about the results (eventhough the check was OK) - why?
See the btrfs-scrub manpage... Note that normally btrfs scrub start is asynchronous and should return effectively immediately, the only possible errors therefore being for example if the given path doesn't point to a btrfs or btrfs-device (which would return a status code of 1, scrub couldn't be performed), etc. Status can be checked via btrfs scrub status, and/or, or you can use the btrfs scrub start's -B (don't background) switch, which will cause it to wait until the scrub is finished and print a summary report. That should allow you to check for a status code of 3, scrub found uncorrectable errors, as well. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
