Re: Disk images.

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

peter@easthope.ca wrote:
> fdisk shows that the archive drive here is not formatted.

It is not "partitioned".
"Formatted" usually applies to medium formatting, e.g. of new BD-RE
media, or to filesystem formatting, e.g. by mkfs.ext4.


> xorriso : NOTE : Loading ISO image tree from LBA 0
> Media summary: 48 sessions, 4339255 data blocks, 8475m data,  457g free

Looks like the content is still a valid multi-session ISO 9660
filesystem.
(Multi-session is different from partitioning by all sessions sharing
the same block address space, whereas partitions each establish their
own block numbering beginning by 0.)


> # fdisk /dev/sdd
> The device contains 'iso9660' signature and it will be removed by a write comman
> d. See fdisk(8) man page and --wipe option for more details.

Smart.
Alternatively you could deface the ISO 9660 filesystem by

  xorriso -outdev stdio:/dev/sdd -blank as_needed

or by

  dd if=/dev/zero bs=64K count=1 of=/dev/sdd

It might be necessary to unplug and replug the device or to run
something like

  hdparm -z /dev/sdd

to let the system know that the filesystem signature changed.


Have a nice day :)

Thomas