[ 4.365859] usb 8-1: device not accepting address 5, error -71 [ 4.365920] usb usb8-port1: unable to enumerate USB device [ 4.433539] BTRFS info (device sda1): bdev /dev/sdb1 errs: wr 2701995, rd 2718862, flush 0, corrupt 6, gen 0
/dev/sdb is dropping a lot of reads and writes. Is /dev/sdb in a SATA-USB enclosure of some kind? [ 16.914959] blk_update_request: I/O error, dev fd0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 [ 16.914963] floppy: error 10 while reading block 0 Curious but I don't think it's related. [ 20.685589] attempt to access beyond end of device sdb1: rw=524288, want=496544128, limit=496091703 [ 20.685798] attempt to access beyond end of device sdb1: rw=2049, want=496544128, limit=496091703 [ 20.685804] BTRFS error (device sda1): bdev /dev/sdb1 errs: wr 2701996, rd 2718862, flush 0, corrupt 6, gen 0 Something is definitely confused but I'm not sure what or why. $ sudo btrfs insp dump-s /dev/sdb1 | grep dev_item.total_bytes Compare that value with (Sectors * 512) from: $ sudo fdisk -l /dev/sdb The fdisk number of bytes should be the same as or more than the btrfs bytes. $ sudo smartctl -x /dev/sdb That might require installing the smartmontools package. -- Chris Murphy -- Chris Murphy