Norman> What you should be able to do with software raid1 is the Norman> following: Stop the raid, mount both underlying devices Norman> instead of the raid device, but of course READ ONLY. Both Norman> contain the complete data and filesystem, and in addition to Norman> that the md superblock at the end. Both should be identical Norman> copies of that. Thus, you do not have to resync Norman> afterwards. You then can backup the one disk while serving the Norman> web server from the other. When you are done, unmount, Norman> assemble the raid, mount it and go on. Umm... so what you're proposing would mean that he would have to stop his application, make sure nothing is accessing that volume, and then restart the application? Somehow I don't see that happening. Why do you feel that you have to stop and umount the volume for the splitting off of a read-only mirror pair for backups? John - 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
