On Fri, Jul 15, 2016 at 12:52 PM, Austin S. Hemmelgarn <ahferro...@gmail.com> wrote:
> Your own 'btrfs fi df' output clearly says that more than 99% of your data > chunks are in a RAID0 profile, hence my statement. Somewhen in ancient Btrfs list history, there was a call to change the mkfs default for multiple device from data raid0 profile to single. But I just tried it and it's still raid0. That's pretty risky for a default as any file more than 64KiB is going to end up with an unrecoverable hole in the data, and it might be that the OP was expecting single profile when creating this file system and just overlooked that it's raid0, not linear. Even single profile is risky. Some users might be prepared to lose some data on one failed device. But the safest option would be to use raid1 (two copies only, should we one day get n-copies) profile for data and metadata when the profile isn't otherwise specified. By default. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
