On Sun, Aug 11, 2019 at 02:24:25PM +0200, Tomasz Torcz wrote:
> On Sun, Aug 11, 2019 at 08:18:54AM -0400, Hendrik Boom wrote:
> > On Sun, Aug 11, 2019 at 02:13:48PM +1000, Erik Christiansen wrote:
> > > On 10.08.19 21:51, Hendrik Boom wrote:
> > > > So I want to find out what's in /dev/sda4 on my hard drive. The
> > > > computer has *never* had Windows on it. So I try to mount it, and am
> > > > told:
> > > >
> > > > april:/farhome/hendrik# mount /dev/sda4 /test
> > > > NTFS signature is missing.
> > > > Failed to mount '/dev/sda4': Invalid argument
> > > > The device '/dev/sda4' doesn't seem to have a valid NTFS.
> > > > Maybe the wrong device is used? Or the whole disk instead of a
> > > > partition (e.g. /dev/sda, not /dev/sda1)? Or the other way
> > > > around?
> > > > april:/farhome/hendrik#
> > > >
> > > > Why would it try for and NTFS file system on a Linux machine?
> > >
> > > To move from speculation to analysis requires information. One way to
> > > read the filesystem type of an unmounted filesystem is with blkid, e.g.:
> > >
> > > $ blkid /dev/sdb1
> > > /dev/sdb1: LABEL="fred" UUID="7713e1b5-1bdf-41d1-9aa9" TYPE="ext2"
> > >
> > > As you have not specified an fstype in the mount command, it'll normally
> > > use the blkid libraries to discover the fstype in just this way, so
> > > let's see what it finds.
> >
> > april:/farhome/hendrik# blkid /dev/sda4
> > /dev/sda4: PARTLABEL="Linux filesystem"
> > PARTUUID="14fdecea-4672-4d03-9660-868f3fd630ec"
> > april:/farhome/hendrik#
> >
> > And if it doesn't mention type, should I presume that it's likely a
> > partition that does not have a file system installed? Or at
> > least not one the current Linux system can handle?
>
> That may be true. You can also check with “wipefs” tool (don't worry,
> without -a it won't wipe anything):
>
> wipefs --no-act /dev/sda4
>
> Wipefs has a big database of various filesystem metadata, it detects
> almost anything.

april:/farhome/hendrik# wipefs --no-act /dev/sda4
april:/farhome/hendrik#

Looks empty.

Thanks. Now I wonder why I ever created that partition.

-- hendrik


>

> -- 
> Tomasz Torcz                Only gods can safely risk perfection,
> xmpp: zdzichubg@???     it's a dangerous thing for a man.  -- Alia

>
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