Eric Sandeen, le Sun 08 Apr 2007 22:24:50 -0500, a écrit : > Samuel Thibault wrote: > >Distribution installers usually try to probe OSes for building a suited > >grub menu. Unfortunately, mounting an ext3 partition, even in read-only > >mode, does perform some operations on the filesystem (log recovery). > >This is not a good idea since it may silently garbage data. > > Can you elaborate? Under what circumstances is log replay going to harm > data? Do you mean that the installer mounts partitions, looking for > what OS is installed? How is that harmful? > > Ohhh... this is http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=417407 > isn't it? Yes. > Hm, so the root cause there seems that the installer found 2 legs of a > mirror and mounted them independently, recovering them independently... > But why did that cause problems? Because that thrashed his data (or at least it didn't help to keep data safe). > Other options you may have in the installer, though, is to check for > md superblocks before mounting bare partitions, or maybe use the > BLKROSET ioctl to set the block device to read-only prior to mount, > for added insurance... That's one the things proposed in the bugreport yes. Samuel - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
