Mi maestro me dio su computadora portátil (con Fedora 16) y una tarjeta flash compacta con datos. Quiere tener acceso a los archivos de la tarjeta, pero no pudo acceder a ellos. El problema es que Linux no sabe qué tipo de partición es. Supongo que hay JFS:
root@debian:~# dmesg |grep sdc
[ 9066.908223] sd 3:0:0:1: [sdc] 3940272 512-byte logical blocks: (2.01 GB/1.87 GiB)
[ 9066.962307] sd 3:0:0:1: [sdc] Write Protect is off
[ 9066.962310] sd 3:0:0:1: [sdc] Mode Sense: 03 00 00 00
[ 9066.962312] sd 3:0:0:1: [sdc] Assuming drive cache: write through
[ 9067.028420] sd 3:0:0:1: [sdc] Assuming drive cache: write through
[ 9067.028637] sdc: unknown partition table
[ 9067.097065] sd 3:0:0:1: [sdc] Assuming drive cache: write through
[ 9067.097281] sd 3:0:0:1: [sdc] Attached SCSI removable disk
y algunos datos:
root@debian:~# hexdump -Cn 65536 /dev/sdc
00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00008000 4a 46 53 31 01 00 00 00 48 63 0e 00 00 00 00 00 |JFS1....Hc......|
00008010 00 10 00 00 0c 00 03 00 00 02 00 00 09 00 00 00 |................|
00008020 00 20 00 00 00 09 20 10 02 00 00 00 00 00 00 00 |. .... .........|
00008030 04 00 00 00 26 00 00 00 02 00 00 00 24 00 00 00 |....&.......$...|
00008040 41 03 00 00 16 00 00 00 00 02 00 00 a0 cc 01 00 |A...............|
00008050 37 00 00 00 69 cc 01 00 b6 d8 ac 4b 00 00 00 00 |7...i......K....|
00008060 32 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 |2...............|
00008070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00008080 00 00 00 00 00 00 00 00 90 15 e5 5f e3 c4 45 fa |..........._..E.|
00008090 9d 6a 5c b5 4f da 62 1a 00 00 00 00 00 00 00 00 |.j\.O.b.........|
000080a0 00 00 00 00 00 00 00 00 c3 c9 01 00 ed 81 00 00 |................|
000080b0 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000080c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
[cut]
*
0000f000 4a 46 53 31 01 00 00 00 48 63 0e 00 00 00 00 00 |JFS1....Hc......|
0000f010 00 10 00 00 0c 00 03 00 00 02 00 00 09 00 00 00 |................|
0000f020 00 20 00 00 00 09 20 10 00 00 00 00 00 00 00 00 |. .... .........|
0000f030 04 00 00 00 26 00 00 00 02 00 00 00 24 00 00 00 |....&.......$...|
0000f040 41 03 00 00 16 00 00 00 00 02 00 00 a0 cc 01 00 |A...............|
0000f050 37 00 00 00 69 cc 01 00 b6 d8 ac 4b 00 00 00 00 |7...i......K....|
0000f060 32 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 |2...............|
0000f070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
0000f080 00 00 00 00 00 00 00 00 90 15 e5 5f e3 c4 45 fa |..........._..E.|
0000f090 9d 6a 5c b5 4f da 62 1a 00 00 00 00 00 00 00 00 |.j\.O.b.........|
0000f0a0 00 00 00 00 00 00 00 00 c3 c9 01 00 ed 81 00 00 |................|
0000f0b0 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
0000f0c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00010000
Soy un novato total en los sistemas de archivos. Busqué en Google y descubrí que el superbloque JFS puede comenzar con un desplazamiento de 0x8000. ¿Pero qué sigue? ¿Cómo montar esta tarjeta? Si hubiera una tabla de particiones normal, esperaría 55 AA en los bytes 510 y 511, pero los primeros 8000 bytes están claros. Cualquier ayuda sería muy apreciada.