Waxhead posted on Sun, 27 Dec 2015 14:59:18 +0100 as excerpted: > I have a "toy-array" of 6x USB drives hooked up to a hub where I made a > btrfs raid 6 data+metadata filesystem.
Just noting as an aside comment to the main thread... While doing this with a "toy-array" for experimental purposes is fine and indeed encouraged, do your research and LOTS of testing before trying to setup particularly multi-device btrfs over USB for normal use. There have been a number of trouble reports posted for USB connected devices, where the trouble simply vanished when the devices were attached via (e)SATA. Apparently various SATA/USB bridge controllers aren't entirely reliable, a few USB root hubs likewise (tho the bridge-controllers are the most common culprit), and USB itself wasn't really designed for this sort of thing, tho obviously many people use it for attaching storage today. Personally, while I might use btrfs on single-device USB attached storage, I'd be extremely hesitant to do multi-device btrfs via USB, and would definitely test it (VERY!) well before considering it usable if I did, as there's just too many ways multiple USB-attached devices can get out of sync with each other, breaking the filesystem. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- 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
