On Fedora 19 with all updates, when I mkfs.btrfs and then mount the volume, I''m getting this in dmesg: [ 280.534868] Btrfs loaded [ 280.581799] device fsid 94ed05cb-89a9-4d6b-a1e2-5312687b59f5 devid 1 transid 4 /dev/mapper/vg1-brick1 [ 280.590140] btrfs: super block crcs don''t match, older mkfs detected [ 280.597746] btrfs: disk space caching is enabled [ 280.661204] SELinux: initialized (dev dm-4, type btrfs), uses xattr btrfs-progs-0.20.rc1.20130308git704a08c-1.fc19.x86_64 kernel-3.10.0-1.fc20.x86_64 Is this expected? Benign? Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sun, Jul 14, 2013 at 12:11:04PM -0600, Chris Murphy wrote:> On Fedora 19 with all updates, when I mkfs.btrfs and then mount the volume, I''m getting this in dmesg: > > [ 280.534868] Btrfs loaded > [ 280.581799] device fsid 94ed05cb-89a9-4d6b-a1e2-5312687b59f5 devid 1 transid 4 /dev/mapper/vg1-brick1 > [ 280.590140] btrfs: super block crcs don''t match, older mkfs detected > [ 280.597746] btrfs: disk space caching is enabled > [ 280.661204] SELinux: initialized (dev dm-4, type btrfs), uses xattr > > btrfs-progs-0.20.rc1.20130308git704a08c-1.fc19.x86_64 > kernel-3.10.0-1.fc20.x86_64 > > Is this expected? Benign?Yes, I believe it''s harmless and will go away after the first mount. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk == PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- I gave up smoking, drinking and sex once. It was the scariest --- 20 minutes of my life.
On Jul 14, 2013, at 12:13 PM, Hugo Mills <hugo@carfax.org.uk> wrote:> On Sun, Jul 14, 2013 at 12:11:04PM -0600, Chris Murphy wrote: >> On Fedora 19 with all updates, when I mkfs.btrfs and then mount the volume, I''m getting this in dmesg: >> >> [ 280.534868] Btrfs loaded >> [ 280.581799] device fsid 94ed05cb-89a9-4d6b-a1e2-5312687b59f5 devid 1 transid 4 /dev/mapper/vg1-brick1 >> [ 280.590140] btrfs: super block crcs don''t match, older mkfs detected >> [ 280.597746] btrfs: disk space caching is enabled >> [ 280.661204] SELinux: initialized (dev dm-4, type btrfs), uses xattr >> >> btrfs-progs-0.20.rc1.20130308git704a08c-1.fc19.x86_64 >> kernel-3.10.0-1.fc20.x86_64 >> >> Is this expected? Benign? > > Yes, I believe it''s harmless and will go away after the first > mount.Weird. I don''t get this message on a regular partition, e.g. mkfs.btrfs /dev/sda7, mount /dev/sda7 /data. I only get it so far when formatting an lvm thinp LV. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Jul 14, 2013, at 12:19 PM, Chris Murphy <lists@colorremedies.com> wrote:> > On Jul 14, 2013, at 12:13 PM, Hugo Mills <hugo@carfax.org.uk> wrote: > >> On Sun, Jul 14, 2013 at 12:11:04PM -0600, Chris Murphy wrote: >>> On Fedora 19 with all updates, when I mkfs.btrfs and then mount the volume, I''m getting this in dmesg: >>> >>> [ 280.534868] Btrfs loaded >>> [ 280.581799] device fsid 94ed05cb-89a9-4d6b-a1e2-5312687b59f5 devid 1 transid 4 /dev/mapper/vg1-brick1 >>> [ 280.590140] btrfs: super block crcs don''t match, older mkfs detected >>> [ 280.597746] btrfs: disk space caching is enabled >>> [ 280.661204] SELinux: initialized (dev dm-4, type btrfs), uses xattr >>> >>> btrfs-progs-0.20.rc1.20130308git704a08c-1.fc19.x86_64 >>> kernel-3.10.0-1.fc20.x86_64 >>> >>> Is this expected? Benign? >> >> Yes, I believe it''s harmless and will go away after the first >> mount. > > Weird. I don''t get this message on a regular partition, e.g. mkfs.btrfs /dev/sda7, mount /dev/sda7 /data. I only get it so far when formatting an lvm thinp LV.No error with a regular partition or LV, or a small thinp LV. But with larger thinp LVs, I get some out of memory related errors, but the mkfs still completes, then I''m getting the CRC mismatch error on mount. So this may be a real CRC mismatch problem, due to concurrent out of memory problems. So I''m going to chock this up, for now, to other thinp related issues. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html