Wenn eine externe Festplatte gemountet wird, sagt sie, dass die NTFS-Signatur fehlt

Hier ist meine Fdisk-Ausgabe

Disk /dev/loop0: 3.7 MiB, 3887104 bytes, 7592 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop1: 29.5 MiB, 30920704 bytes, 60392 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop2: 2.3 MiB, 2355200 bytes, 4600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop3: 231.2 MiB, 242475008 bytes, 473584 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop4: 14.5 MiB, 15196160 bytes, 29680 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop5: 87.9 MiB, 92123136 bytes, 179928 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop6: 24.2 MiB, 25358336 bytes, 49528 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop7: 34.2 MiB, 35827712 bytes, 69976 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 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: 9FECC467-BAED-439C-B326-73D473E77F2B  Device Start End Sectors Size Type /dev/sda1 2048 923647 921600 450M Windows recovery environment /dev/sda2 923648 1128447 204800 100M EFI System /dev/sda3 1128448 1161215 32768 16M Microsoft reserved /dev/sda4 1161216 419432447 418271232 199.5G Microsoft basic data /dev/sda5 419432448 629147647 209715200 100G Microsoft basic data /dev/sda6 629147648 638912511 9764864 4.7G Linux swap /dev/sda7 638912512 976771071 337858560 161.1G Linux filesystem     Disk /dev/loop8: 45 MiB, 47235072 bytes, 92256 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop9: 14.5 MiB, 15204352 bytes, 29696 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop10: 143.9 MiB, 150818816 bytes, 294568 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop11: 29.5 MiB, 30920704 bytes, 60392 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop12: 13 MiB, 13619200 bytes, 26600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop13: 147.3 MiB, 154406912 bytes, 301576 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop14: 13 MiB, 13619200 bytes, 26600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop15: 87.9 MiB, 92114944 bytes, 179912 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop16: 34.6 MiB, 36216832 bytes, 70736 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop17: 44.1 MiB, 46256128 bytes, 90344 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop18: 144.4 MiB, 151375872 bytes, 295656 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop19: 29.5 MiB, 30920704 bytes, 60392 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop20: 23.6 MiB, 24780800 bytes, 48400 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop21: 226.5 MiB, 237490176 bytes, 463848 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop22: 11.9 MiB, 12472320 bytes, 24360 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop23: 140.7 MiB, 147496960 bytes, 288080 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop24: 885.2 MiB, 928149504 bytes, 1812792 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop25: 140.9 MiB, 147722240 bytes, 288520 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop26: 270.4 MiB, 283561984 bytes, 553832 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop27: 42.1 MiB, 44183552 bytes, 86296 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop28: 139.5 MiB, 146276352 bytes, 285696 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop29: 169.4 MiB, 177590272 bytes, 346856 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop30: 881.1 MiB, 923889664 bytes, 1804472 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop31: 141.6 MiB, 148447232 bytes, 289936 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop32: 141.5 MiB, 148398080 bytes, 289840 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop33: 163.7 MiB, 171638784 bytes, 335232 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop34: 88.2 MiB, 92483584 bytes, 180632 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop35: 3.7 MiB, 3887104 bytes, 7592 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop36: 3.7 MiB, 3878912 bytes, 7576 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop37: 24.1 MiB, 25268224 bytes, 49352 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop38: 13 MiB, 13619200 bytes, 26600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop39: 183.7 MiB, 192618496 bytes, 376208 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop40: 750.9 MiB, 787349504 bytes, 1537792 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop41: 12 MiB, 12574720 bytes, 24560 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop42: 371.7 MiB, 389734400 bytes, 761200 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop43: 2.2 MiB, 2351104 bytes, 4592 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop44: 14.5 MiB, 15208448 bytes, 29704 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop45: 2.3 MiB, 2355200 bytes, 4600 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop46: 24.1 MiB, 25276416 bytes, 49368 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop47: 141.8 MiB, 148664320 bytes, 290360 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop48: 12.4 MiB, 13021184 bytes, 25432 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/loop49: 310.8 MiB, 325902336 bytes, 636528 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes   Disk /dev/sdc: 465.8 GiB, 500107859968 bytes, 976773164 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 33553920 bytes Disklabel type: gpt Disk identifier: 1FA328D4-33C4-49E7-8095-88E1F4CF5D09  Device Start End Sectors Size Type /dev/sdc1 34 262177 262144 128M Microsoft reserved /dev/sdc2 264192 976771071 976506880 465.7G Microsoft basic data  Partition 1 does not start on physical sector boundary. 

Wenn ich versuche, die externe Festplatte / dev / sdc2 so zu mounten

 sudo mount /dev/sdc2 /media/tmp -t ntfs 

Es sagt

NTFS signature is missing. Failed to mount '/dev/sdc2': Invalid argument The device '/dev/sdc2' doesn't seem to have a valid NTFS. Maybe the wrong device is used? Or the whole disk instead of a partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?