He estado intentando recuperar datos de una unidad Seagate 7200.11 de 1,5 TB (2 particiones ext4_ durante 3 días, predominantemente con ddrescue y testdisk, pero debido a algún error crítico en el disco (¿probablemente daño de SA o algo similar?), se pone abandonó /dev cuando el sistema accede a algún sector específico.
Creo que lo más cerca que he estado es con ddrescue. Pero la imagen que creó estaba incompleta y no pude montarla porque daba un error de "geometría incorrecta: el recuento de bloques xxx excede el tamaño del dispositivo", entre otros. Anoche encendí nuevamente ddrescue, esta vez en la segunda partición, y después de esperar 3 horas, me fui a dormir. En ese momento, había copiado ~150 GB de la partición de ~700 GB. Comando utilizado:
ddrescue -n -v -T 30 --skip-size=1M,10M --min-read-rate=50k /dev/sdc2 /media/rescue/Drive2.img /media/rescue/Drive2.log
Me decepcioné bastante cuando me desperté y vi que la unidad había desaparecido de /dev/ y, en consecuencia, ddrescue mostraba un "tamaño de error" en el rango de más de 200 GB. El /var/log/messages contenía líneas repetidas:
2014-06-13T10:54:08.526490+05:00 suse kernel: [ 6693.096125] Read(10): 28 00 5a 79 55 88 00 00 08 00
2014-06-13T10:54:08.526491+05:00 suse kernel: [ 6693.096174] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T10:54:08.526491+05:00 suse kernel: [ 6693.096176] sd 2:0:0:0: [sdc]
2014-06-13T10:54:08.526492+05:00 suse kernel: [ 6693.096176] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T10:54:08.526493+05:00 suse kernel: [ 6693.096177] sd 2:0:0:0: [sdc] CDB:
2014-06-13T10:54:08.526494+05:00 suse kernel: [ 6693.096178] Read(10): 28 00 5a 79 4d e8 00 00 08 00
2014-06-13T10:54:08.526494+05:00 suse kernel: [ 6693.096226] sd 2:0:0:0: [sdc] Unhandled error code
y estos en el momento en que desapareció de/dev (creo):
2014-06-13T07:34:30.290574+05:00 suse kernel: [ 6743.832817] ata3: EH complete
2014-06-13T07:34:33.892459+05:00 suse kernel: [ 6747.432198] ata3.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0
2014-06-13T07:34:33.892486+05:00 suse kernel: [ 6747.432203] ata3.00: irq_stat 0x40000008
2014-06-13T07:34:33.892489+05:00 suse kernel: [ 6747.432206] ata3.00: failed command: READ FPDMA QUEUED
2014-06-13T07:34:33.892502+05:00 suse kernel: [ 6747.432212] ata3.00: cmd 60/08:00:10:50:08/00:00:5c:00:00/40 tag 0 ncq 4096 in
2014-06-13T07:34:33.892511+05:00 suse kernel: [ 6747.432212] res 41/40:08:17:50:08/00:00:5c:00:00/00 Emask 0x409 (media error) <F>
2014-06-13T07:34:33.892517+05:00 suse kernel: [ 6747.432215] ata3.00: status: { DRDY ERR }
2014-06-13T07:34:33.892519+05:00 suse kernel: [ 6747.432217] ata3.00: error: { UNC }
2014-06-13T07:34:34.003455+05:00 suse kernel: [ 6747.543056] ata3.00: configured for UDMA/133
2014-06-13T07:34:34.003476+05:00 suse kernel: [ 6747.543074] sd 2:0:0:0: [sdc] Unhandled sense code
2014-06-13T07:34:34.003480+05:00 suse kernel: [ 6747.543076] sd 2:0:0:0: [sdc]
2014-06-13T07:34:34.003483+05:00 suse kernel: [ 6747.543078] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
2014-06-13T07:34:34.003486+05:00 suse kernel: [ 6747.543080] sd 2:0:0:0: [sdc]
2014-06-13T07:34:34.003488+05:00 suse kernel: [ 6747.543082] Sense Key : Medium Error [current] [descriptor]
2014-06-13T07:34:34.003491+05:00 suse kernel: [ 6747.543085] Descriptor sense data with sense descriptors (in hex):
2014-06-13T07:34:34.003502+05:00 suse kernel: [ 6747.543086] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
2014-06-13T07:34:34.003503+05:00 suse kernel: [ 6747.543095] 5c 08 50 17
2014-06-13T07:34:34.003504+05:00 suse kernel: [ 6747.543099] sd 2:0:0:0: [sdc]
2014-06-13T07:34:34.003505+05:00 suse kernel: [ 6747.543110] Add. Sense: Unrecovered read error - auto reallocate failed
2014-06-13T07:34:34.003505+05:00 suse kernel: [ 6747.543111] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:34:34.003506+05:00 suse kernel: [ 6747.543112] Read(10): 28 00 5c 08 50 10 00 00 08 00
2014-06-13T07:34:34.003507+05:00 suse kernel: [ 6747.543116] end_request: I/O error, dev sdc, sector 1544048663
2014-06-13T07:34:34.003508+05:00 suse kernel: [ 6747.543118] Buffer I/O error on device sdc2, logical block 3270402
2014-06-13T07:34:34.003509+05:00 suse kernel: [ 6747.543127] ata3: EH complete
2014-06-13T07:34:36.758454+05:00 suse kernel: [ 6750.295735] ata3.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0
2014-06-13T07:34:36.758484+05:00 suse kernel: [ 6750.295740] ata3.00: irq_stat 0x40000008
2014-06-13T07:34:36.758488+05:00 suse kernel: [ 6750.295743] ata3.00: failed command: READ FPDMA QUEUED
2014-06-13T07:34:36.758492+05:00 suse kernel: [ 6750.295750] ata3.00: cmd 60/08:00:10:50:08/00:00:5c:00:00/40 tag 0 ncq 4096 in
2014-06-13T07:34:36.758496+05:00 suse kernel: [ 6750.295750] res 41/40:08:17:50:08/00:00:5c:00:00/00 Emask 0x409 (media error) <F>
2014-06-13T07:34:36.758499+05:00 suse kernel: [ 6750.295752] ata3.00: status: { DRDY ERR }
2014-06-13T07:34:36.758502+05:00 suse kernel: [ 6750.295754] ata3.00: error: { UNC }
2014-06-13T07:34:36.932467+05:00 suse kernel: [ 6750.469333] ata3.00: configured for UDMA/133
2014-06-13T07:34:36.932495+05:00 suse kernel: [ 6750.469351] sd 2:0:0:0: [sdc] Unhandled sense code
2014-06-13T07:34:36.932501+05:00 suse kernel: [ 6750.469354] sd 2:0:0:0: [sdc]
2014-06-13T07:34:36.932504+05:00 suse kernel: [ 6750.469355] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
2014-06-13T07:34:36.932507+05:00 suse kernel: [ 6750.469357] sd 2:0:0:0: [sdc]
2014-06-13T07:34:36.932510+05:00 suse kernel: [ 6750.469359] Sense Key : Medium Error [current] [descriptor]
2014-06-13T07:34:36.932514+05:00 suse kernel: [ 6750.469362] Descriptor sense data with sense descriptors (in hex):
2014-06-13T07:34:36.932534+05:00 suse kernel: [ 6750.469364] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
2014-06-13T07:34:36.932546+05:00 suse kernel: [ 6750.469372] 5c 08 50 17
2014-06-13T07:34:36.932551+05:00 suse kernel: [ 6750.469376] sd 2:0:0:0: [sdc]
2014-06-13T07:34:36.932556+05:00 suse kernel: [ 6750.469379] Add. Sense: Unrecovered read error - auto reallocate failed
2014-06-13T07:34:36.932560+05:00 suse kernel: [ 6750.469381] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:34:36.932564+05:00 suse kernel: [ 6750.469382] Read(10): 28 00 5c 08 50 10 00 00 08 00
2014-06-13T07:34:36.932567+05:00 suse kernel: [ 6750.469390] end_request: I/O error, dev sdc, sector 1544048663
2014-06-13T07:34:36.932572+05:00 suse kernel: [ 6750.469394] Buffer I/O error on device sdc2, logical block 3270402
2014-06-13T07:34:36.932576+05:00 suse kernel: [ 6750.469420] ata3: EH complete
2014-06-13T07:36:15.441806+05:00 suse su: (to root) procyon on /dev/pts/5
2014-06-13T07:53:20.731456+05:00 suse kernel: [ 7873.286421] ata3: failed to read log page 10h (errno=-5)
2014-06-13T07:53:20.731483+05:00 suse kernel: [ 7873.286429] ata3.00: exception Emask 0x1 SAct 0x1 SErr 0x0 action 0x0
2014-06-13T07:53:20.731487+05:00 suse kernel: [ 7873.286431] ata3.00: irq_stat 0x40000008
2014-06-13T07:53:20.731488+05:00 suse kernel: [ 7873.286434] ata3.00: failed command: READ FPDMA QUEUED
2014-06-13T07:53:20.731490+05:00 suse kernel: [ 7873.286440] ata3.00: cmd 60/08:00:10:59:6d/00:00:60:00:00/40 tag 0 ncq 4096 in
2014-06-13T07:53:20.731493+05:00 suse kernel: [ 7873.286440] res 40/00:00:10:59:6d/00:00:60:00:00/40 Emask 0x1 (device error)
2014-06-13T07:53:20.731495+05:00 suse kernel: [ 7873.286443] ata3.00: status: { DRDY }
2014-06-13T07:53:20.740442+05:00 suse kernel: [ 7873.296009] ata3.00: both IDENTIFYs aborted, assuming NODEV
2014-06-13T07:53:20.740462+05:00 suse kernel: [ 7873.296013] ata3.00: revalidation failed (errno=-2)
2014-06-13T07:53:20.740464+05:00 suse kernel: [ 7873.296018] ata3: hard resetting link
2014-06-13T07:53:21.045453+05:00 suse kernel: [ 7873.599792] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
2014-06-13T07:53:21.065444+05:00 suse kernel: [ 7873.620355] ata3.00: both IDENTIFYs aborted, assuming NODEV
2014-06-13T07:53:21.065467+05:00 suse kernel: [ 7873.620359] ata3.00: revalidation failed (errno=-2)
2014-06-13T07:53:26.045451+05:00 suse kernel: [ 7878.595494] ata3: hard resetting link
2014-06-13T07:53:26.350457+05:00 suse kernel: [ 7878.900156] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
2014-06-13T07:53:26.395504+05:00 suse kernel: [ 7878.945713] ata3.00: both IDENTIFYs aborted, assuming NODEV
2014-06-13T07:53:26.395516+05:00 suse kernel: [ 7878.945717] ata3.00: revalidation failed (errno=-2)
2014-06-13T07:53:26.395518+05:00 suse kernel: [ 7878.945719] ata3.00: disabled
2014-06-13T07:53:26.395520+05:00 suse kernel: [ 7878.945752] ata3: EH complete
2014-06-13T07:53:26.395522+05:00 suse kernel: [ 7878.945774] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395523+05:00 suse kernel: [ 7878.945775] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395525+05:00 suse kernel: [ 7878.945776] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395528+05:00 suse kernel: [ 7878.945777] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395529+05:00 suse kernel: [ 7878.945778] Read(10): 28 00 60 6d 59 10 00 00 08 00
2014-06-13T07:53:26.395531+05:00 suse kernel: [ 7878.945782] end_request: I/O error, dev sdc, sector 1617778960
2014-06-13T07:53:26.395532+05:00 suse kernel: [ 7878.945784] Buffer I/O error on device sdc2, logical block 12486690
2014-06-13T07:53:26.395534+05:00 suse kernel: [ 7878.945863] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395535+05:00 suse kernel: [ 7878.945868] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395537+05:00 suse kernel: [ 7878.945869] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395538+05:00 suse kernel: [ 7878.945872] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395540+05:00 suse kernel: [ 7878.945873] Read(10): 28 00 60 6d 59 10 00 00 08 00
2014-06-13T07:53:26.395541+05:00 suse kernel: [ 7878.945882] end_request: I/O error, dev sdc, sector 1617778960
2014-06-13T07:53:26.395543+05:00 suse kernel: [ 7878.945885] Buffer I/O error on device sdc2, logical block 12486690
2014-06-13T07:53:26.395544+05:00 suse kernel: [ 7878.945997] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395546+05:00 suse kernel: [ 7878.946000] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395547+05:00 suse kernel: [ 7878.946002] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395548+05:00 suse kernel: [ 7878.946004] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395550+05:00 suse kernel: [ 7878.946005] Read(10): 28 00 60 6d 59 80 00 00 08 00
2014-06-13T07:53:26.395551+05:00 suse kernel: [ 7878.946012] end_request: I/O error, dev sdc, sector 1617779072
2014-06-13T07:53:26.395552+05:00 suse kernel: [ 7878.946015] Buffer I/O error on device sdc2, logical block 12486704
2014-06-13T07:53:26.395554+05:00 suse kernel: [ 7878.946076] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395555+05:00 suse kernel: [ 7878.946080] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395557+05:00 suse kernel: [ 7878.946082] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395558+05:00 suse kernel: [ 7878.946085] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395560+05:00 suse kernel: [ 7878.946100] Read(10): 28 00 60 6d 5a 00 00 00 08 00
2014-06-13T07:53:26.395562+05:00 suse kernel: [ 7878.946141] end_request: I/O error, dev sdc, sector 1617779200
2014-06-13T07:53:26.395563+05:00 suse kernel: [ 7878.946152] Buffer I/O error on device sdc2, logical block 12486720
2014-06-13T07:53:26.395580+05:00 suse kernel: [ 7878.946192] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395582+05:00 suse kernel: [ 7878.946194] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395584+05:00 suse kernel: [ 7878.946195] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395585+05:00 suse kernel: [ 7878.946196] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395587+05:00 suse kernel: [ 7878.946197] Read(10): 28 00 60 6d 5b 00 00 00 08 00
2014-06-13T07:53:26.395588+05:00 suse kernel: [ 7878.946202] end_request: I/O error, dev sdc, sector 1617779456
2014-06-13T07:53:26.395590+05:00 suse kernel: [ 7878.946203] Buffer I/O error on device sdc2, logical block 12486752
2014-06-13T07:53:26.395592+05:00 suse kernel: [ 7878.946221] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395593+05:00 suse kernel: [ 7878.946223] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395595+05:00 suse kernel: [ 7878.946224] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395596+05:00 suse kernel: [ 7878.946224] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395598+05:00 suse kernel: [ 7878.946227] Read(10): 28 00 60 6d 5d 00 00 00 08 00
2014-06-13T07:53:26.395599+05:00 suse kernel: [ 7878.946228] end_request: I/O error, dev sdc, sector 1617779968
2014-06-13T07:53:26.395601+05:00 suse kernel: [ 7878.946229] Buffer I/O error on device sdc2, logical block 12486816
2014-06-13T07:53:26.395602+05:00 suse kernel: [ 7878.946245] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395608+05:00 suse kernel: [ 7878.946254] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395611+05:00 suse kernel: [ 7878.946254] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395612+05:00 suse kernel: [ 7878.946255] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395615+05:00 suse kernel: [ 7878.946258] Read(10): 28 00 60 6d 61 00 00 00 08 00
2014-06-13T07:53:26.395616+05:00 suse kernel: [ 7878.946259] end_request: I/O error, dev sdc, sector 1617780992
2014-06-13T07:53:26.395618+05:00 suse kernel: [ 7878.946260] Buffer I/O error on device sdc2, logical block 12486944
2014-06-13T07:53:26.395624+05:00 suse kernel: [ 7878.946281] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.395626+05:00 suse kernel: [ 7878.946282] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.395628+05:00 suse kernel: [ 7878.946284] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.395629+05:00 suse kernel: [ 7878.946285] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.395634+05:00 suse kernel: [ 7878.946286] Read(10): 28 00 60 6d 69 00 00 00 08 00
2014-06-13T07:53:26.395636+05:00 suse kernel: [ 7878.946295] end_request: I/O error, dev sdc, sector 1617783040
2014-06-13T07:53:26.395637+05:00 suse kernel: [ 7878.946297] Buffer I/O error on device sdc2, logical block 12487200
2014-06-13T07:53:26.396515+05:00 suse kernel: [ 7878.946314] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.396522+05:00 suse kernel: [ 7878.946315] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.396524+05:00 suse kernel: [ 7878.946316] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.396527+05:00 suse kernel: [ 7878.946318] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.396529+05:00 suse kernel: [ 7878.946319] Read(10): 28 00 60 6d 79 00 00 00 08 00
2014-06-13T07:53:26.396531+05:00 suse kernel: [ 7878.946323] end_request: I/O error, dev sdc, sector 1617787136
2014-06-13T07:53:26.396533+05:00 suse kernel: [ 7878.946325] Buffer I/O error on device sdc2, logical block 12487712
2014-06-13T07:53:26.396534+05:00 suse kernel: [ 7878.946344] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.396536+05:00 suse kernel: [ 7878.946346] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.396538+05:00 suse kernel: [ 7878.946347] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.396540+05:00 suse kernel: [ 7878.946348] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.396542+05:00 suse kernel: [ 7878.946349] Read(10): 28 00 60 6d 99 00 00 00 08 00
2014-06-13T07:53:26.396544+05:00 suse kernel: [ 7878.946354] end_request: I/O error, dev sdc, sector 1617795328
2014-06-13T07:53:26.396546+05:00 suse kernel: [ 7878.946356] Buffer I/O error on device sdc2, logical block 12488736
2014-06-13T07:53:26.396548+05:00 suse kernel: [ 7878.946374] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.396550+05:00 suse kernel: [ 7878.946376] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.396552+05:00 suse kernel: [ 7878.946377] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
2014-06-13T07:53:26.396554+05:00 suse kernel: [ 7878.946379] sd 2:0:0:0: [sdc] CDB:
2014-06-13T07:53:26.396556+05:00 suse kernel: [ 7878.946379] Read(10): 28 00 60 6d d9 08 00 00 08 00
2014-06-13T07:53:26.396557+05:00 suse kernel: [ 7878.946401] sd 2:0:0:0: [sdc] Unhandled error code
2014-06-13T07:53:26.396560+05:00 suse kernel: [ 7878.946403] sd 2:0:0:0: [sdc]
2014-06-13T07:53:26.396561+05:00 suse kernel: [ 7878.946404] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Desafortunadamente, no puedo determinar en qué bloque/sector ocurrió el problema, así que puedo reiniciar ddrescue desde ese punto en adelante, omitiendo el área problemática. Por ahora, lo mismo ocurrió con testdisk cuando intenté enumerar los archivos para recuperación; Después de seleccionar minuciosamente todos los archivos para copiar, testdisk no pudo copiar ni uno solo de ellos porque creo que la unidad había desaparecido durante el escaneo.
Por ahora, reinicié ddrescue con esto:
ddrescue -n -v -T 30 -A --retrim -d -i 150G --skip-size=500k,10M --min-read-rate=50k /dev/sdc2 /media/rescue/Drive2.img /media/rescue/Drive2.log
Pero como es probable que se repita nuevamente el fenómeno de la desaparición del disco y se produzca una imagen incompleta/casi inútil, realmente necesito ayuda para encontrar una manera de omitir los sectores que están causando este problema, o cualquier otro consejo para recuperar los datos. .