[PLUG] Imaging CF card...

[Russell Senior]

Ditto what Tomas said. For looking at it locally, dd'ing the partition
(/dev/sdb1) is fine, but to make a full backup of the CF card so that you
can reproduce it, you want an image of /dev/sdb as well. The loopback
device (see losetup) is a fun trick, worth learning about.

On Thu, Aug 8, 2019 at 9:50 AM Tomas Kuchta <tomas.kuchta.lists at gmail.com>
wrote:

> If you dd sdb1, you will still need the boot sector and partition table
> from sdb to be able to use the new CF card.
>
> -T
>
> On Thu, Aug 8, 2019, 12:25 <michael at robinson-west.com> wrote:
>
> > That's the secret sauce!  /dev/sdb1 instead of /dev/sdb.  Thank you ;-)
> >
> > August 8, 2019 11:19 AM, alan at clueserver.org wrote:
> >
> > > On your dd command try using /dev/sdb1 instead of /dev/sdb.
> > >
> > > dd if=/dev/sdb1 of=image.img
> > >
> > > mount -o loop image.img /mnt
> > >
> > >> [mrobinson at turion-roch-robinson-west-com ~]$ sudo fdisk -l /dev/sdb
> > >>
> > >> Disk /dev/sdb: 1018 MB, 1018773504 bytes, 1989792 sectors
> > >> Units = sectors of 1 * 512 = 512 bytes
> > >> Sector size (logical/physical): 512 bytes / 512 bytes
> > >> I/O size (minimum/optimal): 512 bytes / 512 bytes
> > >> Disk label type: dos
> > >> Disk identifier: 0x001c2022
> > >>
> > >> Device Boot Start End Blocks Id System
> > >> /dev/sdb1 * 63 1989791 994864+ c W95 FAT32 (LBA)
> > >> [mrobinson at turion-roch-robinson-west-com ~]$
> > >>
> > >> The partition starts at 63, how do I use losetup?
> > >>
> > >> August 8, 2019 10:42 AM, "Ken Stephens" <kennethgstephens at gmail.com>
> > >> wrote:
> > >>
> > >>> Micheal,
> > >>>
> > >>> You using losetup to mount the image to a /dev/loop0?
> > >>>
> > >>> Ken
> > >>>
> > >>> On Thu, Aug 8, 2019 at 8:37 AM <michael at robinson-west.com> wrote:
> > >>
> > >> The server uses a CF card in place of a hard disk. The server oddly
> > >> enough
> > >> is Windows 98 SE based. I have a CentOS 7 box with a USB CF card
> > >> reader.
> > >> I am trying to image the CF card and write the image to a second CF
> > >> card.
> > >> Kind of a, make a backup to experiment with scenario and use the
> > >> backup.
> > >>
> > >> This my CentOS 7 box doesn't work:
> > >>
> > >> $ sudo dd if=/dev/sdb of=win98seQSP2predrivers.img bs=1M count=1000
> > >> status=progress
> > >>
> > >> The file created cannot be mounted. If you write it to another CF
> card,
> > >> you get garbage.
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