[Arm-dev] Making an image

[Robert Moskowitz]

I looked at output from writing the image:

sudo dd of=/dev/sdb bs=4M; sync
0+346813 records in
0+346813 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 147.907 s, 21.8 MB/s

Would this be what I want:

dd if=/dev/sdb of=cubietruck.img bs=4M count=346813



On 03/02/2017 04:33 PM, Robert Moskowitz wrote:
> Can I have a little help making an image via dd, and then compressing it?
>
> I want to save 'checkpoints' of my build process, so that when I have 
> to go back, I do not have to go all the way back to the base image.
>
> I have built my basic image (I will be updating my howto, found a few 
> bugs), and fdisk reports:
>
> Disk /dev/sda: 120.0 GB, 120034124288 bytes, 234441649 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: 0x0000c89d
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sda1            2048     1026047      512000   83  Linux
> /dev/sda2         1026048     2074623      524288   82  Linux swap / 
> Solaris
> /dev/sda3         2074624     6268927     2097152   83  Linux
>
> Obviously, I do not want to dd the whole 120GB, as I am still only 
> using 4GB, though I will probably have to enlarge sda3 a bit to hold 
> all the software I need.  I did this a couple years back, but can't 
> find my notes.  :(
>
> thanks
>
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