Also, wenn Windows 10 plötzlich nicht mehr starten will und dmesg|grep "BTRFS" folgendes ausspuckt:
...
[ 170.864345] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0
[ 170.864347] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9388412928 on dev /dev/sdb5
[ 170.864466] BTRFS warning (device sdb5): checksum error at logical 9388425216 on dev /dev/sdb5, physical 9388425216, root 259, inode 1972, offset 27557888, length 4096, links 1 (path: br_input.vii3R5)
[ 170.864469] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 2, gen 0
usw.
[ 170.864880] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9388429312 on dev /dev/sdb5
[ 170.864994] BTRFS warning (device sdb5): checksum error at logical 9388687360 on dev /dev/sdb5, physical 9388687360, root 259, inode 1972, offset 27820032, length 4096, links 1 (path: br_input.vii3R5)
[ 170.864997] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 5, gen 0
[ 170.864998] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9388687360 on dev /dev/sdb5
[ 170.865197] BTRFS warning (device sdb5): checksum error at logical 9388556288 on dev /dev/sdb5, physical 9388556288, root 259, inode 1972, offset 27688960, length 4096, links 1 (path: br_input.vii3R5)
[ 170.865200] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 6, gen 0
[ 170.865202] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9388556288 on dev /dev/sdb5
[ 170.865387] BTRFS warning (device sdb5): checksum error at logical 9388691456 on dev /dev/sdb5, physical 9388691456, root 259, inode 1972, offset 27824128, length 4096, links 1 (path: br_input.vii3R5)
[ 170.865390] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 7, gen 0
[ 170.865392] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9388691456 on dev /dev/sdb5
[ 170.868261] BTRFS warning (device sdb5): checksum error at logical 9388560384 on dev /dev/sdb5, physical 9388560384, root 259, inode 1972, offset 27693056, length 4096, links 1 (path: br_input.vii3R5)
[ 170.868267] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 8, gen 0
undsoweiter
[ 200.613426] BTRFS error (device sdb5): una[ 180.939687] BTRFS warning (device sdb5): checksum error at logical 9827934208 on dev /dev/sdb5, physical 9827934208, root 521, inode 466790, offset 126976, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.939946] BTRFS warning (device sdb5): checksum error at logical 9828196352 on dev /dev/sdb5, physical 9828196352, root 564, inode 466839, offset 12288, length 4096, links 1 (path: usr/share/doc/packages/avahi/overview.dia)
[ 180.940252] BTRFS warning (device sdb5): checksum error at logical 9827807232 on dev /dev/sdb5, physical 9827807232, root 521, inode 466790, offset 0, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.940324] BTRFS warning (device sdb5): checksum error at logical 9828065280 on
[ 180.940595] BTRFS warning (device sdb5): checksum error at logical 9827934208 on dev /dev/sdb5, physical 9827934208, root 535, inode 466790, offset 126976, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.940629] BTRFS warning (device sdb5): checksum error at logical 9828065280 on dev /dev/sdb5, physical 9828065280, root 535, inode 466790, offset 258048, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.940676] BTRFS warning (device sdb5): checksum error at logical 9828196352 on dev /dev/sdb5, physical 9828196352, root 554, inode 466839, offset 12288, length 4096, links 1 (path: usr/share/doc/packages/avahi/overview.dia)
[ 180.940687] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 37665, gen 0
[ 180.940691] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9828196352 on dev /dev/sdb5
[ 180.940969] BTRFS warning (device sdb5): checksum error at logical 9827807232 on dev /dev/sdb5, physical 9827807232, root 552, inode 466790, offset 0, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.940976] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 37666, gen 0
[ 180.940979] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9827807232 on dev /dev/sdb5
[ 180.941078] BTRFS warning (device sdb5): checksum error at logical 9827934208 on dev /dev/sdb5, physical 9827934208, root 552, inode 466790, offset 126976, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.941084] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 37667, gen 0
[ 180.941086] BTRFS error (device sdb5): unable to fixup (regular) error at logica
[ 180.941136] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9828065280 on dev /dev/sdb5
[ 180.941146] BTRFS warning (device sdb5): checksum error at logical 9828200448 on dev /dev/sdb5, physical 9828200448, root 553, inode 466839, offset 16384, length 4096, links 1 (path: usr/share/doc/packages/avahi/overview.dia)
usw.
[ 180.941525] BTRFS warning (device sdb5): checksum error at logical 9828200448 on dev /dev/sdb5, physical 9828200448, root 521, inode 466839, offset 16384, length 4096, links 1 (path: usr/share/doc/packages/avahi/overview.dia)
[ 180.941557] BTRFS warning (device sdb5): checksum error at logical 9827811328 on dev /dev/sdb5, physical 9827811328, root 560, inode 466790, offset 4096, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.941565] BTRFS warning (device sdb5): checksum error at logical 9828200448 on dev /dev/sdb5, physical 9828200448, root 535, inode 466839, offset 16384, length 4096, links 1 (path: usr/share/doc/packages/avahi/overview.dia)
[ 180.941586] BTRFS warning (device sdb5): checksum error at logical 9827811328 on dev /dev/sdb5, physical 9827811328, root 559, inode 466790, offset 4096, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.941639] BTRFS warning (device sdb5): checksum error at logical 9827811328 on dev /dev/sdb5, physical 9827811328, root 566, inode 466790, offset 4096, length 4096, links 1 (path: usr/lib64/libQt5OpenGL.so.5.12.7)
[ 180.942266] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0,
[ 180.948200] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 37674, gen 0
[ 180.948204] BTRFS error (device sdb5): unable to fixup (regular) error at logical 9828073472 on dev /dev/sdb5
[ 200.613415] BTRFS warning (device sdb5): checksum error at logical 13712228352 on dev /dev/sdb5, physical 13712228352, root 263, inode 1245, offset 1081344, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.613422] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 41523, gen 0ble to fixup (regular) error at logical 13712228352 on dev /dev/sdb5
[ 200.614576] BTRFS warning (device sdb5): checksum error at logical 13712236544 on dev /dev/sdb5, physical 13712236544, root 263, inode 1245, offset 1089536, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.614579] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 41525, gen 0
[ 200.614581] BTRFS error (device sdb5): unable to fixup (regular) error at logical 13712236544 on dev /dev/sdb5
[ 200.614768] BTRFS warning (device sdb5): checksum error at logical 13712240640 on dev /dev/sdb5, physical 13712240640, root 263, inode 1245, offset 1093632, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.614771] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 41526, gen 0
[ 200.614773] BTRFS error (device sdb5): unable to fixup (regular) error at logica
[ 200.619553] BTRFS warning (device sdb5): checksum error at logical 13712248832 on dev /dev/sdb5, physical 13712248832, root 263, inode 1245, offset 1101824, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.619556] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 41528, gen 0
[ 200.619558] BTRFS error (device sdb5): unable to fixup (regular) error at logical 13712248832 on dev /dev/sdb5
[ 200.619740] BTRFS warning (device sdb5): checksum error at logical 13712252928 on dev /dev/sdb5, physical 13712252928, root 263, inode 1245, offset 1105920, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.619743] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 41529, gen 0
[ 200.619745] BTRFS error (device sdb5): unable to fixup (regular) error at logical 13712252928 on dev /dev/sdb5
[ 200.619984] BTRFS warning (device sdb5): checksum error at logical 13712257024 on dev /dev/sdb5, physical 13712257024, root 263, inode 1245, offset 1110016, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.619987] BTRFS error (device sdb5): bdev /dev/sdb5 errs: wr 0, rd 0, flush 0, corrupt 41530, gen 0
[ 200.619988] BTRFS error (device sdb5): unable to fixup (regular) error at logical 13712257024 on dev /dev/sdb5
[ 200.886073] BTRFS warning (device sdb5): checksum error at logical 13751840768 on dev /dev/sdb5, physical 13751840768, root 263, inode 1245, offset 0, length 4096, links 1 (path: tux/.mozilla/firefox/6w15yrkd.default-release/places.sqlite)
[ 200.886431] BTRFS error (device sdb5): unable to fixup (regular) error at logical 13752004608 on dev /dev/sdb5
[ 232.373737] BTRFS info (device sdb5): scrub: finished on devid 1 with status: 0
Alles anzeigen
...liegt wohl ein Hardwareproblem vor. 
Laut meinen Recherchen entweder die SSD, der RAM oder das Mainboard. Gibt es Kriterien, wo man die Komponente weiter eingrenzen kann? Memtest86 lief erstmal durch...