Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #174740

Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue]

From "Thomas Schmitt" <scdbackup@gmx.net>
Newsgroups linux.debian.user
Subject Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue]
Date 2016-11-15 12:50 +0100
Message-ID <sDKps-4m6-15@gated-at.bofh.it> (permalink)
References <sDy4W-4EE-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

Hi,

Richard Owlett wrote:
> ddrescue has run to completion without _reported_ errors for all partitions
> of the drive. I understand that does *NOT* guarantee that the files are not
> corrupt.

A coarse test would be to mount the partitions and to let some archiver
crawl the tree to read the content of each data file.

Create a mount point for the partition to be tested:

  mkdir /mnt/partition

Then with each of the copied partition files /mnt/my_sdb6/my_sdc* do:

  mount -o loop,ro,nodev,noexec,nosuid /mnt/my_sdb6/my_sdc1 /mnt/partition

  tar cf - /mnt/partition | wc -c

  umount /mnt/partition

If tar does not report i/o errors and wc tells a plausible byte count,
then all might be well.

mounting has to be done as superuser, of course.
man 8 mount paragraph "Mount options for ntfs" says that you will have
to do the tar part as superuser, unless you assign it at mount time
to a less powerful user id. I read from the manual something like:
  -o loop,ro,nodev,noexec,nosuid,uid=NORMAL_USER_ID,umask=400
but have no ntfs to test whether this makes all file readable for the
desktop user of whom you obtained the number NORMAL_USER_ID by:
  echo $UID


Does somebody know an entertaining filter in Debian, which one could put
between tar and wc to see a progress counter ?


Not so easy to test:
- The file content may still be damaged on application level (e.g. zeros
  where other data should be).
- Important parts of the tree may be missing.


Have a nice day :)

Thomas

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: dd - proper use or more suitable program Andy Smith <andy@strugglers.net> - 2016-11-11 18:00 +0100
  Re: dd - proper use or more suitable program Christian Seiler <christian@iwakd.de> - 2016-11-11 18:40 +0100
    Re: dd - proper use or more suitable program The Wanderer <wanderer@fastmail.fm> - 2016-11-11 19:20 +0100
      Re: dd - proper use or more suitable program Richard Owlett <rowlett@cloud85.net> - 2016-11-11 22:40 +0100
        Re: dd - proper use or more suitable program Andy Smith <andy@strugglers.net> - 2016-11-12 05:50 +0100
          Re: dd - proper use or more suitable program Richard Owlett <rowlett@cloud85.net> - 2016-11-12 09:20 +0100
  Re: dd - proper use or more suitable program Nicolas George <george@nsup.org> - 2016-11-11 19:00 +0100
    Re: dd - proper use or more suitable program Richard Owlett <rowlett@cloud85.net> - 2016-11-11 22:40 +0100
      Re: dd - proper use or more suitable program Christian Seiler <christian@iwakd.de> - 2016-11-12 08:40 +0100
        Re: dd - proper use or more suitable program Richard Owlett <rowlett@cloud85.net> - 2016-11-12 09:30 +0100
          Re: dd - proper use or more suitable program Richard Owlett <rowlett@cloud85.net> - 2016-11-12 18:30 +0100
            Re: dd - proper use or more suitable program Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-11-12 19:30 +0100
              Re: dd - proper use or more suitable program Richard Owlett <rowlett@cloud85.net> - 2016-11-12 20:30 +0100
                Re: dd - proper use or more suitable program Ben Caradoc-Davies <ben@transient.nz> - 2016-11-12 21:00 +0100
                Re: dd - proper use or more suitable program Brian <ad44@cityscape.co.uk> - 2016-11-12 21:10 +0100
                Re: dd - proper use or more suitable program <tomas@tuxteam.de> - 2016-11-12 22:00 +0100
                Invoking ddrescue Richard Owlett <rowlett@cloud85.net> - 2016-11-13 04:10 +0100
                Re: Invoking ddrescue "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-13 13:00 +0100
                Re: Invoking ddrescue <tomas@tuxteam.de> - 2016-11-13 13:10 +0100
                Re: Invoking ddrescue <tomas@tuxteam.de> - 2016-11-13 13:00 +0100
                Re: Invoking ddrescue "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-13 13:40 +0100
                Re: Invoking ddrescue Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-11-13 13:50 +0100
                Re: Invoking ddrescue Nicolas George <george@nsup.org> - 2016-11-13 14:00 +0100
                Re: Invoking ddrescue "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-13 14:40 +0100
                Re: Invoking ddrescue Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-11-13 15:10 +0100
                Re: Invoking ddrescue "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-13 16:10 +0100
                Re: Invoking ddrescue Richard Owlett <rowlett@cloud85.net> - 2016-11-13 17:30 +0100
                Re: Invoking ddrescue Brian <ad44@cityscape.co.uk> - 2016-11-13 15:20 +0100
                Progress report Re: Invoking ddrescue Richard Owlett <rowlett@cloud85.net> - 2016-11-14 20:20 +0100
                Re: Progress report Re: Invoking ddrescue Jonathan Dowland <jmtd@debian.org> - 2016-11-14 21:20 +0100
                Re: Progress report Re: Invoking ddrescue Richard Owlett <rowlett@cloud85.net> - 2016-11-14 22:00 +0100
                Re: Progress report Re: Invoking ddrescue <tomas@tuxteam.de> - 2016-11-14 21:30 +0100
                Re: Progress report Re: Invoking ddrescue Richard Owlett <rowlett@cloud85.net> - 2016-11-14 22:20 +0100
                Re: Progress report Re: Invoking ddrescue "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-14 21:30 +0100
                Re: Progress report Re: Invoking ddrescue Richard Owlett <rowlett@cloud85.net> - 2016-11-14 22:10 +0100
                Re: Progress report Re: Invoking ddrescue Pascal Hambourg <pascal@plouf.fr.eu.org> - 2016-11-17 20:20 +0100
                SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Richard Owlett <rowlett@cloud85.net> - 2016-11-14 23:40 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Brian <ad44@cityscape.co.uk> - 2016-11-15 00:30 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Richard Owlett <rowlett@cloud85.net> - 2016-11-15 04:00 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Brian <ad44@cityscape.co.uk> - 2016-11-15 21:00 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] <tomas@tuxteam.de> - 2016-11-15 22:00 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-15 12:50 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Brian <ad44@cityscape.co.uk> - 2016-11-15 13:30 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-15 13:50 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Richard Owlett <rowlett@cloud85.net> - 2016-11-15 13:50 +0100
                Re: SUC[C]ESS!!! - was [Re: Progress report Re: Invoking ddrescue] David Wright <deblis@lionunicorn.co.uk> - 2016-11-15 16:30 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-15 17:20 +0100
                Re: SUCESS!!! - was [Re: Progress report Re: Invoking ddrescue] Greg Wooledge <wooledg@eeg.ccf.org> - 2016-11-15 17:30 +0100

csiph-web