On Feb 8, 2014, at 6:55 PM, Roman Mamedov <rm@xxxxxxxxxxx> wrote: > > Not sure what exactly becomes problematic if a 2-device RAID1 tells the user > they can store 1 TB of their data on it, and is no longer lying about the > possibility to store 2 TB on it as currently. > > Two 1TB disks in RAID1. OK but while we don't have a top level switch for variable raid on a volume yet, the on-disk format doesn't consider the device to be raid1 at all. Not the device, nor the volume, nor the subvolume have this attribute. It's a function of the data, metadata or system chunk via their profiles. I can do a partial conversion on a volume, and even could do this multiple times and end up with some chunks in every available option, some chunks single, some raid1, some raid0, some raid5. All I have to do is cancel the conversion before each conversion is complete, successively shortening the time. And it's not fair to say this has no application because such conversions take a long time. I might not want to fully do a conversion all at once. There's no requirement that I do so. In any case I object to the language being used that implicitly indicates the 'raidness' is a device or disk attribute. Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
