Hi all, following the comment of Neil about the fact that an md device, in r/o mode, will BUG() in case of write attempt, I would like to ask for some more information on the topic. The problem is the following, mounting a filesystem in r/o does not, correctly, prevent writes to the underlying device. Now, assuming a filesystem is mounted r/w over an md device, being r/w too, it is pretty clear that switching the md device to r/o will create problems. What if the md device is started in r/o mode and than, later, the filesystem is mounted *without* specifying r/o mode? The filesystem might try to write to the device, but it will not work, of course. Does this will cause a BUG() in md? Because using a r/o memory card, there are no problems, the mount recognize the device is r/o and it sets the filesystems r/o too. I do not know if it anyway tries to write to the r/o device, ignoring the errors reported. I would say that, if md BUG() in any case, it could be a bug... :-) Any comments? Thanks, bye, -- piergiorgio -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
