Re: Permission issues - operator error?

[Richard Owlett <rowlett@cloud85.net>]

On 09/23/2018 08:26 AM, Tom Furie wrote:
> On Sun, Sep 23, 2018 at 08:20:10AM -0500, Richard Owlett wrote:
>
> > root@debian8-6:/home/richard# # purge device
> > root@debian8-6:/home/richard# dd if=/dev/zero of=/dev/sdb bs=4M
>
> > root@debian8-6:/home/richard# # force UID/GID to 'richard', label device,
> > accept standard defaults
> > root@debian8-6:/home/richard# mkfs.ext4 root_owner=1000:1000 -L
> > 2018Sept23tst1 /dev/sdb1
> > mke2fs 1.42.12 (29-Aug-2014)
> > mkfs.ext4: invalid blocks '/dev/sdb1' on device 'root_owner=1000:1000'
>
> > root@debian8-6:/home/richard# # is all ok
> > root@debian8-6:/home/richard# e2fsck -fy /dev/sdb1
> > e2fsck 1.42.12 (29-Aug-2014)
> > e2fsck: No such file or directory while trying to open /dev/sdb1
> > Possibly non-existent device?
>
> > root@debian8-6:/home/richard# # create partition table with Gparted
> > root@debian8-6:/home/richard# mkfs.ext4 root_owner=1000:1000 -L
> > 2018Sept23tst1 /dev/sdb1
> > mke2fs 1.42.12 (29-Aug-2014)
> > mkfs.ext4: invalid blocks '/dev/sdb1' on device 'root_owner=1000:1000'
> > root@debian8-6:/home/richard# e2fsck -fy /dev/sdb1
> > e2fsck 1.42.12 (29-Aug-2014)
> > e2fsck: No such file or directory while trying to open /dev/sdb1
> > Possibly non-existent device?
>
> You have overwritten the whole sdb device with zeros, including the
> partition table. You'll have to recreate your partitions before you can
> create filesystems on them.
>
> Cheers,
> Tom

I had thought I had created a partition table with Gparted.
It had not reported any error.
I was able to use it to create ext4 partition.

root@debian8-6:/home/richard# e2fsck -fy /dev/sdb1
e2fsck 1.42.12 (29-Aug-2014)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
testagain: 11/1970416 files (0.0% non-contiguous), 167682/7870208 blocks
root@debian8-6:/home/richard#