Amit a écrit : > > However, this still poses a problem. Check out the following case: > > 1. Plug in a USB drive with an ext4 filesystem. > 2. Set the readonly flag using blockdev. > 3. Compute the checksum on this block device. > 4. Mount the ext4 filesytem and then unmount it without doing anything. > 5. Compute the checksum on the block device (checksum does not match). > > The ext4 filesystem still updates the journal on the device and changes > the whole checksum.
That's because the filesystem is on a partition, not on the whole disk, an the partition block device is still read-write. The read-only flag must be set on the disk and all its partitions. I guess udev can do this. -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
