I have an external 2.5 1TB Samsung hard drive, and it fails mount. Here's what palimpsest says about it:It's even able to do a benchmark on it:When I try to mount it normally, it fails:$ sudo mount /dev/sdb3 tempmount: you must specify the filesystem typeSo I specified the filesystem type:$ sudo mount -t vfat /dev/sdb3 tempmount: wrong fs type, bad option, bad superblock on /dev/sdb3,       missing codepage or helper program, or other error       In some cases useful info is found in syslog - try       dmesg | tail  or soSpecifying ext2, ext3, and ext4 fails with the same error. Specifying ntfs fails with a different error:$ sudo mount -t ntfs /dev/sdb3 tempNTFS signature is missing.Failed to mount '/dev/sdb3': Invalid argumentThe device '/dev/sdb3' doesn't seem to have a valid NTFS.Maybe the wrong device is used? Or the whole disk instead of apartition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?I'm pretty sure that the filesystem type is either vfat or ntfs. I checked the other types just to make sure, especially because that's what palimpsest claimed. (update: I later discovered that this GUI tool says Partition Type is Linux (0x83) even if there is no filesystem on the partition)Here's what the beginning of the partition looks like:# head -c 1024 < /dev/sdb3 | hd00000000  d1 f5 9f 3b 5b ca 7e 8f  d7 8b be f8 b8 39 cc 1d  |...;[.~......9..|00000010  e2 48 4f a3 e7 8e 64 68  34 6e 92 3c 5f 6e 59 e7  |.HO...dh4n.<_nY.|00000020  a6 d0 7b f1 f9 2a 13 3d  43 61 f9 90 eb bd 0e ec  |..{..*.=Ca......|00000030  ed 81 86 bb 09 64 8f c7  7f ea 01 dd a9 bf 49 7f  |.....d........I.|00000040  f9 9b 76 cc bf 94 a4 50  fe f5 d1 cd 14 d4 cd e7  |..v....P........|00000050  cf c7 e3 62 25 0c cb 78  3c 1b b5 31 18 8d bb 79  |...b%..x<..1...y|00000060  7e 65 da 54 17 74 15 f2  0f 99 a3 82 61 b2 ab 27  |~e.T.t......a..'|00000070  7f d6 fd 60 10 14 2f ea  09 1f 15 b6 66 78 fc b8  |...`../.....fx..|00000080  b7 14 60 bb 7e 9f bb 25  b0 5c e2 fc 90 93 5b a2  |..`.~..%.\....[.|00000090  01 47 3b 49 c6 23 fd d7  56 42 fb 05 cf 77 27 fa  |.G;I.#..VB...w'.|000000a0  06 c1 fa f4 16 34 b6 cf  3f f1 68 8a 73 42 ff fb  |.....4..?.h.sB..|000000b0  b9 6e 2c 7e a9 6e 22 bd  6f 7b fd 7a 17 27 18 d3  |.n,~.n.o{.z.'..|000000c0  05 fb d3 37 0e aa 49 9c  8f b1 d3 b7 15 34 9d f3  |...7..I......4..|000000d0  29 7f f4 34 c1 1f ea 89  3c 9f bb ae cc 0b df 0b  |)..4....<.......|000000e0  7a ee d7 26 b2 f3 e8 ca  fb 5d dd 54 d5 b0 1a f8  |z..&.....].T....|000000f0  fe f8 62 8a 0a a6 4a 2f  da cf 2b 8e 46 c2 fc ee  |..b...J/..+.F...|00000100  4b c8 fd 17 33 2b 58 3c  fe ae 10 4f ff d1 0c 9d  |K...3+X<...O....|00000110  4e 73 7d 91 ad 7f d9 41  79 ee 21 ed 87 2d c3 52  |Ns}....Ay.!..-.R|00000120  60 cc f4 a0 7c de 88 68  86 c7 53 f8 bc 98 50 af  |`...|..h..S...P.|00000130  44 58 cf 39 93 3e cb f7  cb 98 ff 72 35 92 7d 97  |DX.9.>.....r5.}.|00000140  1e 30 ff 79 3c 89 fa 0f  33 36 44 01 f1 af df e6  |.0.y<...36D.....|00000150  01 df f2 c1 9b 85 e3 13  41 5f ba ed 97 5e 40 1b  |........A_...^@.|00000160  de 5f 72 ae 24 1a 5a c1  5e e6 8d 64 fe e3 1a f7  |._r.$.Z.^..d....|00000170  1f 93 7f 29 85 3e 32 4d  aa 96 fd c5 f6 30 58 17  |...).>2M.....0X.|00000180  3d 84 3c 1f 3b e7 88 3d  fa 7a 70 7d 8a df 13 dc  |=.<.;..=.zp}....|00000190  60 fa ea 10 cd f7 db 9a  c4 ec 95 97 17 f9 e7 9d  |`...............|000001a0  1b 54 30 7e e3 45 f5 5c  fd 9e 66 e8 25 d4 17 7a  |.T0~.E.\..f.%..z|000001b0  0d b3 83 21 6b 3b 1e c8  fd b2 75 4a 28 ff f7 9c  |...!k;....uJ(...|000001c0  ec c1 1f ad 1c 61 4a d9  45 f9 bb 7d cc 3f d4 0b  |.....aJ.E..}.?..|000001d0  fe e1 f9 40 16 f9 3c 7a  4c f3 d3 23 d6 05 63 bf  |...@..<zL..#..c.|000001e0  b0 9f d3 e7 b4 84 c9 9c  4d fd 6f 4b d7 56 43 e3  |........M.oK.VC.|000001f0  cb eb 59 13 f7 15 41 e9  19 4d f9 b0 51 57 6b 60  |..Y...A..M..QWk`|00000200  38 5c 4a 7c c7 bd 3b 1c  b1 51 d0 13 39 76 36 12  |8\J|..;..Q..9v6.|00000210  d6 9f 5e c2 51 9e 17 7a  80 c5 df 2e b1 a4 47 ff  |..^.Q..z......G.|00000220  ad 27 b3 e9 a6 9b 74 1e  4f bd 39 18 67 ff a5 eb  |.'....t.O.9.g...|00000230  2b 78 c6 fc e5 cc 4c 9a  af 19 78 30 0b 9a a1 bc  |+x....L...x0....|00000240  9f 2b 7b 95 1f 16 09 f3  29 b7 79 24 63 90 a0 3f  |.+{.....).y$c..?|00000250  75 bb 7b 1c ac e3 78 7f  e5 e6 03 61 d0 1d 79 08  |u.{...x....a..y.|00000260  d9 9e ec f9 a6 39 94 df  c7 51 3e a7 cb c4 0a a8  |.....9...Q>.....|00000270  03 79 fd f7 f5 bb 8e 68  28 d9 45 f5 08 fb e3 21  |.y.....h(.E....!|00000280  50 0c 7c cc e7 89 dc 65  31 d6 bb 2f a8 ff fd 66  |P.|....e1../...f|00000290  3b 4f 28 1e 9e 20 fc ed  52 a8 86 b6 67 a2 d4 ce  |;O(.. ..R...g...|000002a0  d5 b6 9f ff 0e c5 e0 e1  c2 79 6a 15 04 e3 c9 db  |.........yj.....|000002b0  a4 87 12 73 cf 17 da 4b  d3 c8 9e 05 2b b3 a0 3c  |...s...K....+..<|000002c0  ec 47 f6 49 1d a1 c4 ee  7f 79 7e 70 4d 84 37 8c  |.G.I.....y~pM.7.|000002d0  ce 67 b1 c0 16 df f4 7d  c4 f0 d3 82 16 64 2f 86  |.g.....}.....d/.|000002e0  be 1f 0b dd 64 9e 7f 70  aa 4b 82 65 93 2b e5 bb  |....d..p.K.e.+..|000002f0  ff d7 43 09 d3 b6 67 d8  29 e7 73 87 b7 82 6e 60  |..C...g.).s...n`|00000300  01 f5 7f cd e9 fa a6 7e  ba 13 32 ff bf e3 b0 22  |.......~..2....|00000310  a8 eb 78 7c 35 e7 7f 0c  af 77 3f c8 f9 d5 93 12  |..x|5....w?.....|00000320  a0 18 e1 4c f3 93 5f 85  c7 42 d1 85 d7 cf 37 d7  |...L.._..B....7.|00000330  7a e0 71 b9 30 df de 2e  1e ea f7 96 52 be 3c 30  |z.q.0.......R.<0|00000340  3c 15 0d 31 41 92 1c 9f  f7 9e c5 ec 81 e6 00 cd  |<..1A...........|00000350  bf ea 77 af 06 96 b3 7c  5e e1 b4 0f 5b c1 94 58  |..w....|^...[..X|00000360  20 39 ca f9 4e f7 54 68  ad bf 49 45 8e 36 fe c0  | 9..N.Th..IE.6..|00000370  88 02 e8 d7 71 fe 4d f2  cf 2e 18 26 d8 eb 65 c9  |....q.M....&..e.|00000380  ee a8 2d 13 e6 bf 06 db  43 7f b8 0e b2 3d d9 d0  |..-.....C....=..|00000390  d0 14 e6 fd 97 f1 95 6d  ff 3a 97 b6 c6 35 81 6f  |.......m.:...5.o|000003a0  3e 95 ad 5c 9b f0 8c ad  c3 e6 af 8d f6 2c 1e e6  |>..\.........,..|000003b0  7c fc 63 11 2c fe be 7c  9c e2 91 38 ef 30 98 17  ||.c.,..|...8.0..|000003c0  3e 20 fb b6 bc 3b fb fc  e6 67 34 0f 35 f9 69 30  |> ...;...g4.5.i0|000003d0  14 ed eb 29 fe 39 7d ce  01 fa a3 fc fb 3a 0c 4b  |...).9}......:.K|000003e0  83 e5 0c 9f 3f 33 79 8b  12 d6 77 78 fd ba 74 3d  |....?3y...wx..t=|000003f0  c3 67 cb 39 de cf e9 52  08 ed 6b a5 74 c1 76 7d  |.g.9...R..k.t.v}|00000400
External hard drive fails to mount
hard disk