iPod 4th gen - Mountpoint is not writeable

[zoran]

I used Rockbox utility and successfully finished installing Rockbox on my iPod 4th gen. However, after I unmounted my iPod, unplugged it, did a hard reset and switched it on, I got the "file not found" icon. I tried reinstalling Rockbox to no avail.

On my third attempt, I got the "mountpoint is not writeable" error. I tried using chmod 777 on mountpoint but it didn't help. I'm using Arch Linux.

What should I do next?

Thanks for help.

[zoran]

Well, I managed to fix that by simply changing the mountpoint to something else. However, when I try to install Rockbox, this time I get  "creating output path failed" and "extraction failed" errors. I'm really clueless here.

[gevaerts]

Either you're mounting it as root and trying to access it as a regular user, or (more likely) the filesystem is corrupted. Check dmesg output to see if it's the latter.

[zoran]

Either you're mounting it as root and trying to access it as a regular user, or (more likely) the filesystem is corrupted. Check dmesg output to see if it's the latter.

Is that regarding the first problem (that I managed to fix) or second problem?

Also, what should I look for in dmesg? It outputs a lot of things.

[zoran]

Here's what I get when I used dmesg with grep sdb:

Code: [Select]

[  185.209087] sd 4:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[  185.209094] sd 4:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[  185.210462] sd 4:0:0:0: [sdb] Write Protect is off
[  185.210466] sd 4:0:0:0: [sdb] Mode Sense: 64 00 00 08
[  185.211763] sd 4:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[  185.213470] sd 4:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[  185.875335]  sdb: unknown partition table
[  185.877334] sd 4:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[  185.882312] sd 4:0:0:0: [sdb] Attached SCSI removable disk
[  434.584868] sd 5:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[  434.584873] sd 5:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[  434.587297] sd 5:0:0:0: [sdb] Write Protect is off
[  434.587301] sd 5:0:0:0: [sdb] Mode Sense: 64 00 00 08
[  434.589041] sd 5:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[  434.592291] sd 5:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[  435.569121] sd 5:0:0:0: [sdb] Unhandled error code
[  435.569127] sd 5:0:0:0: [sdb]  
[  435.569131] sd 5:0:0:0: [sdb] CDB: 
[  435.569142] end_request: I/O error, dev sdb, sector 0
[  435.569146] Buffer I/O error on device sdb, logical block 0
[  436.545448] sd 5:0:0:0: [sdb] Unhandled error code
[  436.545461] sd 5:0:0:0: [sdb]  
[  436.545465] sd 5:0:0:0: [sdb] CDB: 
[  436.545473] end_request: I/O error, dev sdb, sector 1
[  436.545476] Buffer I/O error on device sdb, logical block 1
[  437.382827]  sdb: unable to read partition table
[  437.388043] sd 5:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[  437.396673] sd 5:0:0:0: [sdb] Attached SCSI removable disk
[  437.562351] scsi 5:0:0:0: [sdb] killing request
[  437.562360] scsi 5:0:0:0: [sdb] Unhandled error code
[  437.562362] scsi 5:0:0:0: [sdb]  
[  437.562366] scsi 5:0:0:0: [sdb] CDB: 
[  437.562375] end_request: I/O error, dev sdb, sector 39062784
[  437.562378] Buffer I/O error on device sdb, logical block 39062784
[  437.562381] Buffer I/O error on device sdb, logical block 39062785
[  437.562383] Buffer I/O error on device sdb, logical block 39062786
[  437.562384] Buffer I/O error on device sdb, logical block 39062787
[  437.562386] Buffer I/O error on device sdb, logical block 39062788
[  437.562388] Buffer I/O error on device sdb, logical block 39062789
[  437.562390] Buffer I/O error on device sdb, logical block 39062790
[  437.562391] Buffer I/O error on device sdb, logical block 39062791
[ 1081.562234] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1081.562243] sd 11:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[ 1081.728726] sd 11:0:0:0: [sdb] Write Protect is off
[ 1081.728731] sd 11:0:0:0: [sdb] Mode Sense: 64 00 00 08
[ 1081.731268] sd 11:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1081.736470] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1082.426700]  sdb: unknown partition table
[ 1082.437571] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1082.444866] sd 11:0:0:0: [sdb] Attached SCSI removable disk
[ 1128.187512] sd 11:0:0:0: [sdb] Unhandled error code
[ 1128.187517] sd 11:0:0:0: [sdb]  
[ 1128.187522] sd 11:0:0:0: [sdb] CDB: 
[ 1128.187533] end_request: I/O error, dev sdb, sector 39062784
[ 1128.187538] Buffer I/O error on device sdb, logical block 39062784
[ 1128.187541] Buffer I/O error on device sdb, logical block 39062785
[ 1128.187543] Buffer I/O error on device sdb, logical block 39062786
[ 1128.187545] Buffer I/O error on device sdb, logical block 39062787
[ 1128.187547] Buffer I/O error on device sdb, logical block 39062788
[ 1128.187549] Buffer I/O error on device sdb, logical block 39062789
[ 1128.187551] Buffer I/O error on device sdb, logical block 39062790
[ 1128.187553] Buffer I/O error on device sdb, logical block 39062791
[ 1129.167731] sd 11:0:0:0: [sdb] Unhandled error code
[ 1129.167736] sd 11:0:0:0: [sdb]  
[ 1129.167740] sd 11:0:0:0: [sdb] CDB: 
[ 1129.167751] end_request: I/O error, dev sdb, sector 39062784
[ 1129.167755] Buffer I/O error on device sdb, logical block 39062784
[ 1136.186125] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1137.021981]  sdb: unknown partition table
[ 1142.959868] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1142.973677]  sdb: unknown partition table
[ 1146.621163] sd 11:0:0:0: [sdb] Unhandled error code
[ 1146.621168] sd 11:0:0:0: [sdb]  
[ 1146.621172] sd 11:0:0:0: [sdb] CDB: 
[ 1146.621181] end_request: I/O error, dev sdb, sector 368
[ 1146.621185] Buffer I/O error on device sdb, logical block 368
[ 1146.621187] Buffer I/O error on device sdb, logical block 369
[ 1146.621189] Buffer I/O error on device sdb, logical block 370
[ 1146.621191] Buffer I/O error on device sdb, logical block 371
[ 1146.621193] Buffer I/O error on device sdb, logical block 372
[ 1146.621194] Buffer I/O error on device sdb, logical block 373
[ 1146.621196] Buffer I/O error on device sdb, logical block 374
[ 1146.621198] Buffer I/O error on device sdb, logical block 375
[ 1146.621203] Buffer I/O error on device sdb, logical block 376
[ 1146.621205] Buffer I/O error on device sdb, logical block 377
[ 1174.859695] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1175.376126]  sdb: unknown partition table
[ 1176.377056] sd 11:0:0:0: [sdb] Unhandled error code
[ 1176.377061] sd 11:0:0:0: [sdb]  
[ 1176.377066] sd 11:0:0:0: [sdb] CDB: 
[ 1176.377076] end_request: I/O error, dev sdb, sector 0
[ 1176.377082] Buffer I/O error on device sdb, logical block 0
[ 1176.377084] lost page write due to I/O error on sdb
[ 1176.377087] Buffer I/O error on device sdb, logical block 1
[ 1176.377088] lost page write due to I/O error on sdb
[ 1176.377090] Buffer I/O error on device sdb, logical block 2
[ 1176.377092] lost page write due to I/O error on sdb
[ 1176.377093] Buffer I/O error on device sdb, logical block 3
[ 1176.377095] lost page write due to I/O error on sdb
[ 1176.377097] Buffer I/O error on device sdb, logical block 4
[ 1176.377098] lost page write due to I/O error on sdb
[ 1176.377100] Buffer I/O error on device sdb, logical block 5
[ 1176.377102] lost page write due to I/O error on sdb
[ 1176.377104] Buffer I/O error on device sdb, logical block 6
[ 1176.377105] lost page write due to I/O error on sdb
[ 1176.377107] Buffer I/O error on device sdb, logical block 7
[ 1176.377108] lost page write due to I/O error on sdb
[ 1176.377117] Buffer I/O error on device sdb, logical block 8
[ 1176.377118] lost page write due to I/O error on sdb
[ 1176.377120] Buffer I/O error on device sdb, logical block 9
[ 1176.377122] lost page write due to I/O error on sdb
[ 1177.366665] sd 11:0:0:0: [sdb] Unhandled error code
[ 1177.366670] sd 11:0:0:0: [sdb]  
[ 1177.366675] sd 11:0:0:0: [sdb] CDB: 
[ 1177.366685] end_request: I/O error, dev sdb, sector 39063004
[ 1178.369857] sd 11:0:0:0: [sdb] Unhandled error code
[ 1178.369862] sd 11:0:0:0: [sdb]  
[ 1178.369867] sd 11:0:0:0: [sdb] CDB: 
[ 1178.369877] end_request: I/O error, dev sdb, sector 0
[ 1208.873907] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1208.888506]  sdb: unknown partition table
[ 1220.435160] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1220.603385]  sdb: unknown partition table
[ 1222.462070] sd 11:0:0:0: [sdb] Unhandled error code
[ 1222.462076] sd 11:0:0:0: [sdb]  
[ 1222.462080] sd 11:0:0:0: [sdb] CDB: 
[ 1222.462091] end_request: I/O error, dev sdb, sector 0
[ 1222.462097] Buffer I/O error on device sdb, logical block 0
[ 1222.462098] lost page write due to I/O error on sdb
[ 1222.462101] Buffer I/O error on device sdb, logical block 1
[ 1222.462103] lost page write due to I/O error on sdb
[ 1222.462105] Buffer I/O error on device sdb, logical block 2
[ 1222.462106] lost page write due to I/O error on sdb
[ 1222.462108] Buffer I/O error on device sdb, logical block 3
[ 1222.462110] lost page write due to I/O error on sdb
[ 1222.462112] Buffer I/O error on device sdb, logical block 4
[ 1222.462113] lost page write due to I/O error on sdb
[ 1222.462115] Buffer I/O error on device sdb, logical block 5
[ 1222.462116] lost page write due to I/O error on sdb
[ 1222.462118] Buffer I/O error on device sdb, logical block 6
[ 1222.462120] lost page write due to I/O error on sdb
[ 1222.462122] Buffer I/O error on device sdb, logical block 7
[ 1222.462123] lost page write due to I/O error on sdb
[ 1222.462132] Buffer I/O error on device sdb, logical block 8
[ 1222.462134] lost page write due to I/O error on sdb
[ 1222.462136] Buffer I/O error on device sdb, logical block 9
[ 1222.462137] lost page write due to I/O error on sdb
[ 1223.449171] sd 11:0:0:0: [sdb] Unhandled error code
[ 1223.449176] sd 11:0:0:0: [sdb]  
[ 1223.449181] sd 11:0:0:0: [sdb] CDB: 
[ 1223.449191] end_request: I/O error, dev sdb, sector 39063004
[ 1224.975366] sd 11:0:0:0: [sdb] Unhandled error code
[ 1224.975371] sd 11:0:0:0: [sdb]  
[ 1224.975375] sd 11:0:0:0: [sdb] CDB: 
[ 1224.975385] end_request: I/O error, dev sdb, sector 0
[ 1229.115122] sd 11:0:0:0: [sdb] Unhandled error code
[ 1229.115127] sd 11:0:0:0: [sdb]  
[ 1229.115132] sd 11:0:0:0: [sdb] CDB: 
[ 1229.115143] end_request: I/O error, dev sdb, sector 128
[ 1229.115149] Buffer I/O error on device sdb, logical block 128
[ 1229.115152] Buffer I/O error on device sdb, logical block 129
[ 1229.115154] Buffer I/O error on device sdb, logical block 130
[ 1229.115156] Buffer I/O error on device sdb, logical block 131
[ 1229.115158] Buffer I/O error on device sdb, logical block 132
[ 1229.115160] Buffer I/O error on device sdb, logical block 133
[ 1229.115162] Buffer I/O error on device sdb, logical block 134
[ 1229.115164] Buffer I/O error on device sdb, logical block 135
[ 1229.115170] Buffer I/O error on device sdb, logical block 136
[ 1229.115172] Buffer I/O error on device sdb, logical block 137
[ 1235.321876] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1235.998387]  sdb: unknown partition table
[ 1236.005959] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1236.019113]  sdb: unknown partition table
[ 1240.829337] sd 11:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1241.005314]  sdb: unknown partition table
[ 1241.176970] scsi 11:0:0:0: [sdb] killing request
[ 1241.176980] scsi 11:0:0:0: [sdb] Unhandled error code
[ 1241.176982] scsi 11:0:0:0: [sdb]  
[ 1241.176990] scsi 11:0:0:0: [sdb] CDB: 
[ 1241.177000] end_request: I/O error, dev sdb, sector 39062784
[ 1241.177005] Buffer I/O error on device sdb, logical block 39062784
[ 1241.177008] Buffer I/O error on device sdb, logical block 39062785
[ 1241.177010] Buffer I/O error on device sdb, logical block 39062786
[ 1241.177012] Buffer I/O error on device sdb, logical block 39062787
[ 1241.177014] Buffer I/O error on device sdb, logical block 39062788
[ 1241.177016] Buffer I/O error on device sdb, logical block 39062789
[ 1241.177018] Buffer I/O error on device sdb, logical block 39062790
[ 1241.177020] Buffer I/O error on device sdb, logical block 39062791
[ 1241.177041] Buffer I/O error on device sdb, logical block 39062784
[ 1241.177048] Buffer I/O error on device sdb, logical block 39062785
[ 1309.984844] sd 13:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1309.984852] sd 13:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[ 1309.987088] sd 13:0:0:0: [sdb] Write Protect is off
[ 1309.987095] sd 13:0:0:0: [sdb] Mode Sense: 64 00 00 08
[ 1309.991838] sd 13:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1309.998982] sd 13:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1311.012830]  sdb:
[ 1311.179309] sd 13:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1311.186820] sd 13:0:0:0: [sdb] Attached SCSI removable disk
[ 1316.407147] sd 13:0:0:0: [sdb] Unhandled error code
[ 1316.407152] sd 13:0:0:0: [sdb]  
[ 1316.407156] sd 13:0:0:0: [sdb] CDB: 
[ 1316.407167] end_request: I/O error, dev sdb, sector 128
[ 1316.407172] Buffer I/O error on device sdb, logical block 128
[ 1316.407176] Buffer I/O error on device sdb, logical block 129
[ 1316.407177] Buffer I/O error on device sdb, logical block 130
[ 1316.407179] Buffer I/O error on device sdb, logical block 131
[ 1316.407181] Buffer I/O error on device sdb, logical block 132
[ 1316.407183] Buffer I/O error on device sdb, logical block 133
[ 1316.407185] Buffer I/O error on device sdb, logical block 134
[ 1316.407187] Buffer I/O error on device sdb, logical block 135
[ 1316.407192] Buffer I/O error on device sdb, logical block 136
[ 1316.407194] Buffer I/O error on device sdb, logical block 137
[ 1333.765367] sd 13:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1334.110324]  sdb:
[ 1339.773927] sd 13:0:0:0: [sdb] Unhandled error code
[ 1339.773932] sd 13:0:0:0: [sdb]  
[ 1339.773936] sd 13:0:0:0: [sdb] CDB: 
[ 1339.773946] end_request: I/O error, dev sdb, sector 224
[ 1339.773951] Buffer I/O error on device sdb, logical block 224
[ 1339.773954] Buffer I/O error on device sdb, logical block 225
[ 1339.773956] Buffer I/O error on device sdb, logical block 226
[ 1339.773958] Buffer I/O error on device sdb, logical block 227
[ 1339.773959] Buffer I/O error on device sdb, logical block 228
[ 1339.773961] Buffer I/O error on device sdb, logical block 229
[ 1339.773963] Buffer I/O error on device sdb, logical block 230
[ 1339.773965] Buffer I/O error on device sdb, logical block 231
[ 1339.773970] Buffer I/O error on device sdb, logical block 232
[ 1339.773972] Buffer I/O error on device sdb, logical block 233
[ 1341.276701] sd 13:0:0:0: [sdb] Unhandled error code
[ 1341.276707] sd 13:0:0:0: [sdb]  
[ 1341.276719] sd 13:0:0:0: [sdb] CDB: 
[ 1341.276728] end_request: I/O error, dev sdb, sector 480
[ 1346.947556] scsi 13:0:0:0: [sdb] killing request
[ 1346.947566] scsi 13:0:0:0: [sdb] Unhandled error code
[ 1346.947569] scsi 13:0:0:0: [sdb]  
[ 1346.947572] scsi 13:0:0:0: [sdb] CDB: 
[ 1346.947582] end_request: I/O error, dev sdb, sector 39062112
[ 1346.947587] Buffer I/O error on device sdb, logical block 39062112
[ 1346.947590] Buffer I/O error on device sdb, logical block 39062113
[ 1346.947592] Buffer I/O error on device sdb, logical block 39062114
[ 1346.947594] Buffer I/O error on device sdb, logical block 39062115
[ 1346.947603] Buffer I/O error on device sdb, logical block 39062116
[ 1346.947605] Buffer I/O error on device sdb, logical block 39062117
[ 1346.947607] Buffer I/O error on device sdb, logical block 39062118
[ 1346.947616] Buffer I/O error on device sdb, logical block 39062119
[ 1346.947659] Buffer I/O error on device sdb, logical block 39062112
[ 1346.947673] Buffer I/O error on device sdb, logical block 39062113
[ 1348.120347] sd 14:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1348.120363] sd 14:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[ 1348.124249] sd 14:0:0:0: [sdb] Write Protect is off
[ 1348.124255] sd 14:0:0:0: [sdb] Mode Sense: 64 00 00 08
[ 1348.292848] sd 14:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1348.456706] sd 14:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1348.981070]  sdb:
[ 1348.988913] sd 14:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1348.996823] sd 14:0:0:0: [sdb] Attached SCSI removable disk
[ 1349.747475] scsi 14:0:0:0: [sdb] killing request
[ 1349.747483] scsi 14:0:0:0: [sdb] Unhandled error code
[ 1349.747485] scsi 14:0:0:0: [sdb]  
[ 1349.747494] scsi 14:0:0:0: [sdb] CDB: 
[ 1349.747501] end_request: I/O error, dev sdb, sector 2048
[ 1350.922478] sd 15:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1350.922486] sd 15:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[ 1350.925848] sd 15:0:0:0: [sdb] Write Protect is off
[ 1350.925852] sd 15:0:0:0: [sdb] Mode Sense: 64 00 00 08
[ 1350.929099] sd 15:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1350.932753] sd 15:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1351.276257]  sdb:
[ 1351.285118] sd 15:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1351.616686] sd 15:0:0:0: [sdb] Attached SCSI removable disk
[ 1353.702194] sd 15:0:0:0: [sdb] Unhandled error code
[ 1353.702199] sd 15:0:0:0: [sdb]  
[ 1353.702203] sd 15:0:0:0: [sdb] CDB: 
[ 1353.702214] end_request: I/O error, dev sdb, sector 128
[ 1353.702220] Buffer I/O error on device sdb, logical block 128
[ 1353.702222] Buffer I/O error on device sdb, logical block 129
[ 1353.702224] Buffer I/O error on device sdb, logical block 130
[ 1353.702226] Buffer I/O error on device sdb, logical block 131
[ 1353.702228] Buffer I/O error on device sdb, logical block 132
[ 1353.702230] Buffer I/O error on device sdb, logical block 133
[ 1353.702232] Buffer I/O error on device sdb, logical block 134
[ 1353.702234] Buffer I/O error on device sdb, logical block 135
[ 1353.702236] Buffer I/O error on device sdb, logical block 136
[ 1353.702238] Buffer I/O error on device sdb, logical block 137
[ 1377.622906] sd 15:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1377.628058]  sdb:
[ 1378.628128] sd 15:0:0:0: [sdb] Unhandled error code
[ 1378.628133] sd 15:0:0:0: [sdb]  
[ 1378.628138] sd 15:0:0:0: [sdb] CDB: 
[ 1378.628148] end_request: I/O error, dev sdb, sector 0
[ 1378.628154] Buffer I/O error on device sdb, logical block 0
[ 1378.628156] lost page write due to I/O error on sdb
[ 1378.628159] Buffer I/O error on device sdb, logical block 1
[ 1378.628160] lost page write due to I/O error on sdb
[ 1378.628162] Buffer I/O error on device sdb, logical block 2
[ 1378.628164] lost page write due to I/O error on sdb
[ 1378.628166] Buffer I/O error on device sdb, logical block 3
[ 1378.628167] lost page write due to I/O error on sdb
[ 1378.628169] Buffer I/O error on device sdb, logical block 4
[ 1378.628170] lost page write due to I/O error on sdb
[ 1378.628172] Buffer I/O error on device sdb, logical block 5
[ 1378.628174] lost page write due to I/O error on sdb
[ 1378.628176] Buffer I/O error on device sdb, logical block 6
[ 1378.628177] lost page write due to I/O error on sdb
[ 1378.628179] Buffer I/O error on device sdb, logical block 7
[ 1378.628180] lost page write due to I/O error on sdb
[ 1378.628189] Buffer I/O error on device sdb, logical block 8
[ 1378.628190] lost page write due to I/O error on sdb
[ 1378.628192] Buffer I/O error on device sdb, logical block 9
[ 1378.628194] lost page write due to I/O error on sdb
[ 1378.628839] sd 15:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1379.618096] sd 15:0:0:0: [sdb] Unhandled error code
[ 1379.618100] sd 15:0:0:0: [sdb]  
[ 1379.618105] sd 15:0:0:0: [sdb] CDB: 
[ 1379.618115] end_request: I/O error, dev sdb, sector 39063004
[ 1379.634359]  sdb:
[ 1380.641061] sd 15:0:0:0: [sdb] Unhandled error code
[ 1380.641066] sd 15:0:0:0: [sdb]  
[ 1380.641071] sd 15:0:0:0: [sdb] CDB: 
[ 1380.641081] end_request: I/O error, dev sdb, sector 0
[ 1385.298166] sd 15:0:0:0: [sdb] Unhandled error code
[ 1385.298171] sd 15:0:0:0: [sdb]  
[ 1385.298176] sd 15:0:0:0: [sdb] CDB: 
[ 1385.298186] end_request: I/O error, dev sdb, sector 480
[ 1385.298192] Buffer I/O error on device sdb, logical block 480
[ 1385.298195] Buffer I/O error on device sdb, logical block 481
[ 1385.298196] Buffer I/O error on device sdb, logical block 482
[ 1385.298198] Buffer I/O error on device sdb, logical block 483
[ 1385.298200] Buffer I/O error on device sdb, logical block 484
[ 1385.298202] Buffer I/O error on device sdb, logical block 485
[ 1385.298204] Buffer I/O error on device sdb, logical block 486
[ 1385.298206] Buffer I/O error on device sdb, logical block 487
[ 1385.298211] Buffer I/O error on device sdb, logical block 488
[ 1385.298214] Buffer I/O error on device sdb, logical block 489
[ 1386.321524] sd 15:0:0:0: [sdb] Unhandled error code
[ 1386.321528] sd 15:0:0:0: [sdb]  
[ 1386.321533] sd 15:0:0:0: [sdb] CDB: 
[ 1386.321543] end_request: I/O error, dev sdb, sector 736
[ 1483.387461] sd 15:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1483.888162] scsi 15:0:0:0: [sdb] killing request
[ 1483.888181] scsi 15:0:0:0: [sdb] Unhandled error code
[ 1483.888183] scsi 15:0:0:0: [sdb]  
[ 1483.888188] scsi 15:0:0:0: [sdb] CDB: 
[ 1483.888198] end_request: I/O error, dev sdb, sector 0
[ 1483.888204] Buffer I/O error on device sdb, logical block 0
[ 1483.888215] scsi 15:0:0:0: [sdb] killing request
[ 1483.888224] scsi 15:0:0:0: [sdb] Unhandled error code
[ 1483.888226] scsi 15:0:0:0: [sdb]  
[ 1483.888230] scsi 15:0:0:0: [sdb] CDB: 
[ 1483.888238] end_request: I/O error, dev sdb, sector 1
[ 1483.888240] Buffer I/O error on device sdb, logical block 1
[ 1483.888303]  sdb: unable to read partition table
[ 1483.888310] sdb: partition table beyond EOD, enabling native capacity
[ 1483.888326] sdb: detected capacity change from 20000267776 to 0
[ 1571.091985] sd 17:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1571.091993] sd 17:0:0:0: [sdb] 39063023 512-byte logical blocks: (20.0 GB/18.6 GiB)
[ 1571.094102] sd 17:0:0:0: [sdb] Write Protect is off
[ 1571.094108] sd 17:0:0:0: [sdb] Mode Sense: 64 00 00 08
[ 1571.096492] sd 17:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1571.100349] sd 17:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1572.105828]  sdb:
[ 1572.112486] sd 17:0:0:0: [sdb] Adjusting the sector count from its reported value: 39063024
[ 1572.290449] sd 17:0:0:0: [sdb] Attached SCSI removable disk
[ 1576.919935] sd 17:0:0:0: [sdb] Unhandled error code
[ 1576.919940] sd 17:0:0:0: [sdb]  
[ 1576.919945] sd 17:0:0:0: [sdb] CDB: 
[ 1576.919955] end_request: I/O error, dev sdb, sector 128
[ 1576.919959] Buffer I/O error on device sdb, logical block 128
[ 1576.919962] Buffer I/O error on device sdb, logical block 129
[ 1576.919964] Buffer I/O error on device sdb, logical block 130
[ 1576.919966] Buffer I/O error on device sdb, logical block 131
[ 1576.919968] Buffer I/O error on device sdb, logical block 132
[ 1576.919969] Buffer I/O error on device sdb, logical block 133
[ 1576.919971] Buffer I/O error on device sdb, logical block 134
[ 1576.919973] Buffer I/O error on device sdb, logical block 135
[ 1576.919978] Buffer I/O error on device sdb, logical block 136
[ 1576.919981] Buffer I/O error on device sdb, logical block 137

I also tried opening my iPod in GParted but it has no formatted partition or partition table, nor is it posible to make one. Everything so far indicated that it's not possible to write on the disk.

Is my iPod bricked or something? :/

[saratoga]

Is it actually booted or in disk mode?  If you just plug a crashed player into USB you will get all kinds of errors.

[zoran]

I gave the iPod to my brother and he managed to fix everything and install Rockbox which works properly now, except for one thing.

After I transfer music onto my iPod, I don't see it in Rockbox, as if it just disappears. When I mount it again, the music is not there.