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Re: Need Help restoring a filesystem on an external drive WD 'My Book'

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On 26.11.2017 14:37, bd wrote:
>
> Hi to Everyone,
>
> My
>
> WD P/N : WD10000H 1Q
>
> S/N : WCAU4D 164675
>
> is about 4 or 5 years old. It is an external drive using external
> power supply. At start, I had formatted it in ext3, so that I 'd be
> able to storage videofiles larger than 2 Gb. Since then, I storaged a
> number of files in several directories, subdirectories etc.. I never
> had any problem until now.
>
> This drive no longer mounts. It does not mount automatically as it
> used to, and I don't know how to mount it manually. My other similar
> drives mount on /dev/sdb1 or /dev/sr0... depending on to which
> computer I mount it. In case it doesn't automatically mount, I just type :
>
> #mount /dev/sdb1 /media/bd/ext
>
> and it works
>
> but right now I don't know for sure the device name to mount.
>
> If I list my /dev directory using ls -lt, I can see what new device
> appears in the list whenever I plug my external drive. It shows 'sdb'.
> Not 'sdb1' as for other external drives, just 'sdb'. If now I type :
>
> # mount /dev/sdb /media/bd/ext
>
> this gets the external drive to react : the light goes up and down for
> awhile, and then I get this message :
>
> 'you must specify the filesystem'
>
> But, if I try :
>
> # mount -t ext3 /dev/sdb /media/bd/ext
>
> I get this : 'wrong fs type, bad option, bad superblock on /dev/sdb…'
>
> same result if I try mounting on 'fat', 'msdos'… filesystems, but I
> doubt if there are any FAT or msdos space left on this device since I
> had reformated it to ext3.
>
> At last, I tried :
>
> # fsck /dev/sdb (the external drive starts to light, then :
>
> 'fsck ext2 : superblock invalid. Trying to backup blocks
>
> fsck ext2 : bad magic number in superblock while trying to open /dev/sdb
>
> Now, if I type :
>
> cat /proc/scsi/scsi
>
> I get this :
>
> scsi0 ATA MAXTOR STM
>
> scsi1 ATA MAXTOR STM
>
> scsi5 WD My Book Direct Access
>
>
> /etc/fstab
>
> does not show any sdb device
>
> How am I to get this drive back to operation, or, at least, to
> recuperate the datafiles that are stored in that WD external drive ?
>
> Thanks in advance to tell me what diagnosis and repair tools I could use
>
> Bernard
>
You have to specify partition to mount not whole disk device.
First of all check if you got disk name right (they could mix up on boot
time):
    # blkid
After that, right mount command should be like this:
    # mount -t ext3 /dev/sdb1 /media/bd/ext
If you suspect disk could be failing, you can mount it as read-only, to
see if it will mount cleanly:
    # mount -t ext3 -o ro /dev/sdb1 /media/bd/ext
To check unmounted ext3 filesystem of partition 1 you should type:
    # fsck.ext3 /dev/sdb1

-- 
With kindest regards, Alexander.

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Need Help restoring a filesystem on an external drive WD 'My Book' bd <bdebreil@teaser.fr> - 2017-11-26 11:10 +0100
  Re: Need Help restoring a filesystem on an external drive WD 'My  Book' arne <sp113438@telfort.nl> - 2017-11-26 11:20 +0100
    Re: Need Help restoring a filesystem on an external drive WD 'My  Book' Bernard <bdebreil@teaser.fr> - 2017-11-28 17:20 +0100
      Re: Need Help restoring a filesystem on an external drive WD 'My Book' "Thomas Schmitt" <scdbackup@gmx.net> - 2017-11-28 19:50 +0100
        Re: Need Help restoring a filesystem on an external drive WD 'My  Book' "Brian J. Oney" <brian.j.oney@googlemail.com> - 2017-11-28 20:40 +0100
        Re: Need Help restoring a filesystem on an external drive WD 'My  Book' Bernard <bdebreil@teaser.fr> - 2017-12-03 19:10 +0100
          Re: Need Help restoring a filesystem on an external drive WD 'My Book' "Thomas Schmitt" <scdbackup@gmx.net> - 2017-12-03 20:10 +0100
          Re: Need Help restoring a filesystem on an external drive WD 'My  Book' David Wright <deblis@lionunicorn.co.uk> - 2017-12-04 02:00 +0100
  Re: Need Help restoring a filesystem on an external drive WD 'My Book' "Thomas Schmitt" <scdbackup@gmx.net> - 2017-11-26 11:50 +0100
  Re: Need Help restoring a filesystem on an external drive WD 'My  Book' "Alexander V. Makartsev" <avbetev@gmail.com> - 2017-11-26 21:10 +0100
  Re: Need Help restoring a filesystem on an external drive WD 'My  Book' David Christensen <dpchrist@holgerdanske.com> - 2017-11-26 22:40 +0100
  Re: Need Help restoring a filesystem on an external drive WD 'My  Book' Richard Hector <richard@walnut.gen.nz> - 2017-11-27 03:10 +0100

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