Montagem de problemas Dispositivo externo USB de 5 TB

Question

Adquiri um Portable Seagate Backup Plus 5 TB USB 3.0 2.5 ", enquanto eu recentemente ultrapassei o drive de 1TB, conectei-me ao meu RPi2 rodando o ArchLinuxARM e servindo música em casa (graças a snapcast ).

Eu organizei a unidade do padrão Micro $ oft com ext4 no meu desktop / servidor principal (executando o Gentoo) sem nenhum problema. Eu intencionalmente omiti a reserva de espaço para root no dispositivo ao fazer isso usando a opção '-m 0' ...

mkfs.ext4 -m 0 /dev/sdg1

... e depois de concluído, usei o rsync para copiar todas as minhas músicas e vídeos copiados para a unidade Seagate antes de conectá-los ao RPi2.

O RPi2 detecta o dispositivo e pretende montá-lo, mas não consigo ler nada dele nem é detectado pelo df ...

dmesg  | grep sdb -B5 -A5
[    6.818812] systemd[1]: Set hostname to <alarmpi>.
[    7.138564] uart-pl011 3f201000.serial: no DMA platform data
[    7.314785] systemd[1]: File /usr/lib/systemd/system/systemd-journald.service:35 configures an IP firewall (IPAddressDeny=any), but the local system does not support BPF/cgroup based firewalling.
[    7.340062] systemd[1]: Proceeding WITHOUT firewalling in effect! (This warning is only shown for the first loaded unit using IP firewalling.)
[    7.437703] scsi 1:0:0:0: Direct-Access     Seagate  BUP SL           0304 PQ: 0 ANSI: 6
[    7.454293] sd 1:0:0:0: [sdb] Spinning up disk...
[    7.775111] systemd[1]: Set up automount mnt-seagate\x2d5tb.automount.
[    7.787824] systemd[1]: Set up automount mnt-backup\x2dvideo.automount.
[    7.798924] systemd[1]: Reached target Remote File Systems.
[    7.809832] systemd[1]: Set up automount mnt-backup\x2dpics.automount.
[    7.821316] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
--
[    9.516523] .
[   10.556508] .
[   11.596497] .
[   12.636494] .
[   12.636861] ready
[   12.641384] sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[   12.651628] sd 1:0:0:0: [sdb] 9767541167 512-byte logical blocks: (5.00 TB/4.55 TiB)
[   12.664365] sd 1:0:0:0: [sdb] 2048-byte physical blocks
[   12.737473] sd 1:0:0:0: [sdb] Write Protect is off
[   12.744906] sd 1:0:0:0: [sdb] Mode Sense: 4f 00 00 00
[   12.745512] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   12.761056] sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[   12.863681]  sdb: sdb1
[   12.870411] sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[   12.881906] sd 1:0:0:0: [sdb] Attached SCSI disk
[   13.946160] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[   13.957666] bcm2835-rng 3f104000.rng: hwrng registered
[   14.022165] snd-rpi-iqaudio-dac soc:sound: ASoC: CODEC DAI pcm512x-hifi not registered - will retry
[   14.181087] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[   14.190832] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
--
[   20.184910] wlan0: RX AssocResp from 00:25:9c:13:e7:12 (capab=0x431 status=0 aid=4)
[   20.301723] wlan0: associated
[   20.306827] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  110.045728] pcm512x 1-004c: No SCLK, using BCLK: -2
[  111.975428] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[ 1428.731832] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)
[ 9204.593083] pcm512x 1-004c: No SCLK, using BCLK: -2
[17467.143120] pcm512x 1-004c: No SCLK, using BCLK: -2
[17499.068650] pcm512x 1-004c: No SCLK, using BCLK: -2

Eu tento montá-lo (como root) e ele pretende montar ...

# mount -v -t auto /dev/sdb1 /mnt/seagate-5tb
mount: /dev/sdb1 mounted on /mnt/seagate-5tb.
 # dmesg | tail -n3
[17467.143120] pcm512x 1-004c: No SCLK, using BCLK: -2
[17499.068650] pcm512x 1-004c: No SCLK, using BCLK: -2
[180078.489600] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)

No entanto, a unidade não é detectada pelo df nem pelo dispositivo ...

# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        15G  8.1G  5.5G  60% /
devtmpfs        464M     0  464M   0% /dev
tmpfs           469M     0  469M   0% /dev/shm
tmpfs           469M  468K  468M   1% /run
tmpfs           469M     0  469M   0% /sys/fs/cgroup
tmpfs           469M  4.0K  468M   1% /tmp
/dev/mmcblk0p1  100M   24M   77M  24% /boot
/dev/sda1       917G  867G  3.5G 100% /mnt/backup-music
tmpfs            94M     0   94M   0% /run/user/1001
 # ls /mnt/seagate-5tb/
ls: cannot access '/mnt/seagate-5tb/': No such device

O kernel parece ter detectado o dispositivo ok e o ext4 é suportado, penso que está listado em /proc/filesystems

# cat /proc/filesystems 
nodev   sysfs
nodev   rootfs
nodev   ramfs
nodev   bdev
nodev   proc
nodev   cpuset
nodev   cgroup
nodev   cgroup2
nodev   tmpfs
nodev   devtmpfs
nodev   configfs
nodev   debugfs
nodev   tracefs
nodev   securityfs
nodev   sockfs
nodev   bpf
nodev   pipefs
nodev   rpc_pipefs
nodev   devpts
    reiserfs
    ext3
    ext2
    ext4
    vfat
    msdos
nodev   nfs
nodev   nfs4
nodev   autofs
nodev   overlay
    jfs
    xfs
    f2fs
nodev   mqueue
btrfs

... então estou um pouco confuso sobre o motivo pelo qual o dispositivo não está montando corretamente e ficaria grato por qualquer sugestão / sugestão para investigar ou tentar.

EDIT: Informações adicionais sobre /etc/fstab

# more /etc/fstab
# <file system> <dir>   <type>  <options>   <dump>  <pass>
/dev/mmcblk0p1  /boot   vfat    defaults        0       0

# External drives
/dev/disk/by-label/backup-music    /mnt/backup-music    auto    auto,nofail,x-systemd.automount,users   0 0
/dev/disk/by-label/seagate-5tb     /mnt/seagate-5tb     auto    auto,nofail,x-systemd.automount,users   0 0

O dispositivo está presente e a etiqueta definitivamente existe e aponta para o dispositivo de bloco correto ...

 # ls -l /dev/disk/by-label/
total 0
lrwxrwxrwx 1 root root 10 Dec 21 12:31 backup-music -> ../../sda1
lrwxrwxrwx 1 root root 10 Dec 21 12:31 seagate-5tb -> ../../sdb1

EDIT 2: Mais informações sobre a tabela de partições

Verificou a tabela de partições com fdisk e sua GPT, portanto a restrição do DOS não deve ser um problema aqui ...

# fdisk  -l /dev/sdb
Disk /dev/sdb: 4.6 TiB, 5000981077504 bytes, 9767541167 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: EDF7F3CD-E4AF-4422-8015-31C1447BBB64

Device     Start        End    Sectors  Size Type
/dev/sdb1   2048 9767541133 9767539086  4.6T Linux filesystem