Re: Cant mount xfs lvm. Experimental Features?
From: Dave Chinner <david@fromorbit.com>
Date: 2015-08-25 23:17:28
On Wed, Aug 26, 2015 at 01:02:58AM +0200, Marko Weber|8000 wrote:
Am 2015-08-26 00:58, schrieb Eric Sandeen:quoted
On 8/25/15 5:53 PM, Marko Weber|8000 wrote:quoted
eric, i rebootet the machine and created a new logical volume. i formatted the lv with mkfs.xfs i tried to mount it on the new kernel: Aug 26 00:47:17 backupserver kernel: XFS (dm-2): Version 5 superblock detected. This kernel has EXPERIMENTAL support enabled! Aug 26 00:47:17 backupserver kernel: Use of these features in this kernel is at your own risk! Aug 26 00:47:17 backupserver kernel: XFS (dm-2): Superblock has unknown read-only compatible features (0x1) enabled. Aug 26 00:47:17 backupserver kernel: XFS (dm-2): Attempted to mount read-only compatible filesystem read-write. Aug 26 00:47:17 backupserver kernel: Filesystem can only be safely mounted read only. Aug 26 00:47:17 backupserver kernel: XFS (dm-2): SB validate failed with error 22.l http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F ...quoted
this happens with the newly created logical volume. the other 2 lvm partitions with xfs are fine. any idea?Without any actual information (i.e. kernel versions or userspace version), I'll have to assume that you have recent xfsprogs which sets some features by default which older kernels cannot understand.ok, what info do you need? on gentoo-linux: xfsprogs: v 3.2.4 (Useflag, nls readline) kernel: 3.14.51
Kernel is too old for finobt=1, and really too old for CRCs to be enabled (not fully supported until 3.16). So, either:
quoted
mkfs.xfs with -m crc=0,finobt=0 to turn off these features if you have an older kernel which doesn't understand them.
or upgrade your kernel. Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs