On Wed, May 20, 2009 at 02:02:43PM +0200, Giuseppe Sacco wrote: > I am testing new kernel on a mips machine (64 bits for kernel, 32 bits > userland) and I found a problem when mounting the root file system. It > is an ext3 file system that is correctly mounted as read only. While > booting the system remount the file system as read/write and keep > starting all daemons. > > Moving from 2.6.26 to 2.6.30 kernel, I get this error while remounting > the file system read/write: > EXT3-fs: cannot change data mode on remount > > My /etc/fstab contains this line: > /dev/sda1 / ext3 rw,errors=continue,data=ordered,relatime 0 1 > > According to mount manuale page, "data=ordered" should be the default > value and should be harmless. > Removing option "data=ordered" fix the boot process. > > So, this is my question: is this a standard behaviour? is "data=ordered" > no more a default value? What should people do when upgrading their > system to newer kernels? The default mount option is now data=writeback (although this is configurable via a compile-time CONFIG option). In general you don't have to specify the data= mount option when you are remounting the filesystem read/write. If you really want to use data=ordered, you can either toggle the CONFIG option at compile time, or use the rootflags= boot command-line option to set the mount options to be used when originally mounting the root filesystem. Regards, - Ted _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
