Nicolas> I have a somewhat convoluted question, which may take me Nicolas> some lines to explain, but the TL;DR version of it is Nicolas> somewhat along the lines of "How can I safely concatenate two Nicolas> raids into a single filesystem, and avoid drastic corruption Nicolas> when one of the two underlying raids fails and goes read only Nicolas> ?" I have done extensive research about that, but I haven't Nicolas> been able to get any answer to it. You can't basically. When half your filesystem goes away, or randomlly readonly, you're screwed. If you're trying to take smaller chunks and make it so that data can span and balance across them without your having to do it, then it *might* make sense to look at ceph or some other distributed filesystem. Having the data spread across multiple backends, with redundancy, is possible, but once too much of the underlying device(s) goes away, no filesystem I know handles that without either going readonly, or totally locking up. -- 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
