>> This may be a stupid question , but are your pool of butter (or BTRFS pool) >> by any chance hooked up via USB? If this is USB2.0 at 480mitb/s then it is >> about 57MB/s / 4 drives = roughly 14.25 or about 11MB/s if you shave off >> some overhead. > >Nope, USB 3. Typically on scrubs I get 110MB/s that winds down to >60MB/s as it progresses to the slow parts of the disk. It could have degraded to USB2 due to bad connection/loose electrical contacts. You know USB3 needs extra wires, and if it lost some it'd connect (or reconnect) in USB2 mode. I'd check historical kernel messages just in case, and/or unmount and reconnect to be sure. -- With Best Regards, Marat Khalili -- 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
