Re: Recuperar un disck

[hubble <hubble@telefonica.net>]

El Fri, 19 Jul 2013 12:40:01 +0200
Pere Nubiola Radigales <pere@nubiola.cat> va dir:

> Fa uns dies s'em va espatllar el disc. Donat que el ordinador era una mica
> vell en vaig compraun de nou , al que vaig installar el el disc vell per
> intentar recuperar dades.
> Quant uintento montar el disc vell em dona els eguent dmesg
> 
> [22611.547157] ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
> [22611.547162] ata4.00: BMDMA stat 0x24
> [22611.547166] ata4.00: failed command: READ DMA EXT
> [22611.547172] ata4.00: cmd 25/00:08:8a:8a:b1/00:00:3a:00:00/e0 tag 0 dma
> 4096 in
> [22611.547172]          res 71/04:04:9d:00:32/04:00:00:00:00/e0 Emask 0x1
> (device error)
> [22611.547175] ata4.00: status: { DRDY DF ERR }
> [22611.547177] ata4.00: error: { ABRT }
> [22611.600951] ata4.00: both IDENTIFYs aborted, assuming NODEV
> [22611.600956] ata4.00: revalidation failed (errno=-2)
> [22611.600966] ata4: soft resetting link
> [22611.772763] ata4.00: both IDENTIFYs aborted, assuming NODEV
> [22611.772776] ata4.00: revalidation failed (errno=-2)
> [22616.751914] ata4: soft resetting link
> [22616.939780] ata4.00: both IDENTIFYs aborted, assuming NODEV
> [22616.939793] ata4.00: revalidation failed (errno=-2)
> [22616.939797] ata4.00: disabled
> [22616.939814] ata4: EH complete
> [22616.939836] sd 3:0:0:0: [sdb] Unhandled error code
> [22616.939839] sd 3:0:0:0: [sdb]
> [22616.939841] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
> [22616.939843] sd 3:0:0:0: [sdb] CDB:
> [22616.939845] Read(10): 28 00 3a b1 8a 8a 00 00 08 00
> [22616.939854] end_request: I/O error, dev sdb, sector 984713866
> [22616.939870] sd 3:0:0:0: [sdb] Unhandled error code
> [22616.939872] sd 3:0:0:0: [sdb]
> [22616.939874] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
> [22616.939876] sd 3:0:0:0: [sdb] CDB:
> [22616.939877] Read(10): 28 00 3a b1 8a 92 00 00 f0 00
> [22616.939884] end_request: I/O error, dev sdb, sector 984713874
> [22616.939887] JBD: Failed to read block at offset 93
> [22616.939929] JBD: recovery failed
> [22616.939931] EXT3-fs (sdb3): error loading journal
> 
> La commanda smartctl --all -T verypermissive /dev/sdb em torna
> 
> smartctl 6.2 2013-04-20 r3812 [x86_64-linux-3.9-1-amd64] (local build)
> Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org
> 
> === START OF INFORMATION SECTION ===
> Vendor:               /3:0:0:0
> Product:
> User Capacity:        600,332,565,813,390,450 bytes [600 PB]
> Logical block size:   774843950 bytes
> scsiModePageOffset: response length too short, resp_len=47 offset=50
> bd_len=46
> scsiModePageOffset: response length too short, resp_len=47 offset=50
> bd_len=46
> >> Terminate command early due to bad response to IEC mode page
> 
> === START OF READ SMART DATA SECTION ===
> Log Sense failed, IE page [scsi response fails sanity test]
> Error Counter logging not supported
> 
> scsiModePageOffset: response length too short, resp_len=47 offset=50
> bd_len=46
> Device does not support Self Test logging
> 
> 
> He trobat aixo:
> https://groups.google.com/forum/#!msg/de.comp.os.unix.linux.hardware/okXwhnwvxQs/gQafyYebquQJ
> 
> Pero está en Aleman. veig que fa un dd peró no veig d'on obté les dades
> 
> Algú em pot ajudar
> 
> 
> 
> 
> Pere Nubiola Radigales
> Telf: +34 656316974
> e-mail: pere@nubiola.cat
>            pnubiola@fsfe.org
>            pere.nubiola@gmail.com

Hola pere,

jo no se si t'ajudarè gaire però tens un disk que sembla que ja no funcionarà be.

el dd es per fer una còpia de seguretat de la partició del disk.

# dd if=/dev/el_teu_disk  of=nom_del_fitxer_que_vulguis_fer_la_imatge 

si no fas el dd pasa directament a intentar recuperar les dades, jo et recomaraia testdisk. si el disk està malament, cada vegada que facis girar el disk és probable que es trenqui alguna cosa més (un disk crec que gira unes 5.000 voltes per minut), per això les úniques pases que et recomano es: dd si vols fer backup de la partició i una recuperació de dades amb un programa del disk o de la imatge, com tu vulguis (els profesionals es decanten per recuperar desde la imatge).

apa, sort!


-- 
hubble <hubble@telefonica.net>