Does a btrfs scrub verify the integrity of the whole filesystem or just the data in that filesystem?
I recently removed some unreliable drives from my multi-volume RAID1 btrfs filesystem and ran a scrub that completed with two corrected errors (see below). I've struggled with this filesystem due to poor choices in hardware on my part and had to recover it several times. As of now I've eliminated all older drives or drives labeled as "desktop" drives. (Knowing what I know now, I'm impressed with how well btrfs has preserved my data despite myself.) I'm at a point where I can grow my existing btrfs filesystem as RAID1 or I can afford to migrate data to a new btrfs single filesystem and then add drives back in to get back to RAID1 mirroring again. Is there value to starting a fresh btrfs filesystem given my history? # btrfs scrub status /mcmedia/ ; echo ; btrfs --version scrub status for 94b3345e-2589-423c-a228-d569bf94ab58 scrub resumed at Mon Feb 2 22:03:14 2015 and finished after 204126 seconds total bytes scrubbed: 23.38TiB with 2 errors error details: csum=2 corrected errors: 2, uncorrectable errors: 0, unverified errors: 0 Btrfs v3.18.2 Both errors were from: [/dev/sdm1].corruption_errs 2 -- Sandy McArthur "He who dares not offend cannot be honest." - Thomas Paine -- 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
