[NTLUG:Discuss] Data recovery - help

[Kenneth Loafman]

After the mount it suggested looking at dmesg.  Maybe something is in there?

It's possible to repair a disk with fsck using an alternate superblock.
Refer to http://linux.die.net/man/8/e2fsck option -b.  Note: unless you've
changed the blocksize of the filesystem, you can run 'mke2fs -n /dev/sde1'
without the -b option.  This will tell you where the superblock backups are
stored.

...Ken

On Mon, Jan 24, 2011 at 11:31 PM, Ben Weatherall <BWeatherall at pdxinc.com>wrote:

> My notes indicate that fsck be run against the destination before it can be
> mounted, especially if there are errors like the log shows. If that fails, I
> am out of ideas, though the actual manuaL gives a few other things to try.
>
> -Ben
>
> ----- Reply message -----
> From: "Fred" <fredstevens at yahoo.com>
> Date: Mon, Jan 24, 2011 22:44
> Subject: [NTLUG:Discuss] Data recovery - help
> To: "discuss at ntlug.org" <discuss at ntlug.org>
>
>
> On Mon Jan 24, 2011 BWeatherall at pdxinc.com wrote:
> >
> > What about ddrescue?
> > Ben
>
>
> Well, Ben, I ran it. Took about 3 hours. Destination drive
> won't mount after operation, as I feared.
>
> # ddrescue -f /dev/sde1 /dev/sda1 /home/fred/ddrescue.log
>
> Press Ctrl-C to interrupt
> Initial status (read from logfile)
> rescued:         0 B,  errsize:       0 B,  errors:       0
> Current status
> rescued:   320070 MB,  errsize:   45568 B,  current rate:        0 B/s
>   ipos:   245816 MB,   errors:      12,    average rate:   20443 kB/s
>   opos:   245816 MB,     time from last successful read:    14.3 m
> Finished
>
> =====================
>
> ddrescue.log contents:
>
> # Rescue Logfile. Created by GNU ddrescue version 1.14
> # Command line: ddrescue -f /dev/sde1 /dev/sda1 /home/fred/ddrescue.log
> # current_pos  current_status
> 0x393BCF4C00     +
> #      pos        size  status
> 0x00000000  0xEBF863000  +
> 0xEBF863000  0x00001000  -
> 0xEBF864000  0x0000C000  +
> 0xEBF870000  0x00000200  -
> 0xEBF870200  0x00892E00  +
> 0xEC0103000  0x00001000  -
> 0xEC0104000  0x000FF000  +
> 0xEC0203000  0x00001000  -
> 0xEC0204000  0x05E1C000  +
> 0xEC6020000  0x00001000  -
> 0xEC6021000  0x0010F000  +
> 0xEC6130000  0x00001000  -
> 0xEC6131000  0x0007F000  +
> 0xEC61B0000  0x00001000  -
> 0xEC61B1000  0xAF5B1000  +
> 0xF75762000  0x00001000  -
> 0xF75763000  0x073EC000  +
> 0xF7CB4F000  0x00001000  -
> 0xF7CB50000  0x002FF000  +
> 0xF7CE4F000  0x00001000  -
> 0xF7CE50000  0x29BEE3C000  +
> 0x393BC8C000  0x00001000  -
> 0x393BC8D000  0x00067000  +
> 0x393BCF4000  0x00001000  -
> 0x393BCF5000  0x1149DDB400  +
>
> ===================
>
> Fred
>
>
>
>
>
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