[CentOS] imaging a drive with dd
Robert Moskowitz
rgm at htt-consult.com
Fri Mar 3 02:14:06 UTC 2017
On 03/02/2017 09:06 PM, fred roller wrote:
> On Thu, Mar 2, 2017 at 8:36 PM, Robert Moskowitz <rgm at htt-consult.com>
> wrote:
>
>> dd if=/dev/sdb of=os.img bs=1M count=3210
>>
> I would recommend bs=512 to keep the block sizes the same though not a huge
> diff just seems to be happier for some reason and add status=progress if
> you would like to monitor how it is doing. Seems the command you have
> should work otherwise.
So, given the fdisk output,
Disk /dev/sdb: 111.8 GiB, 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
Disklabel type: dos
Disk identifier: 0x0000c89d
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 1026047 1024000 500M 83 Linux
/dev/sdb2 1026048 2074623 1048576 512M 82 Linux swap / Solaris
/dev/sdb3 2074624 6268927 4194304 2G 83 Linux
would
count=6268927
?
oh, and this way, I can lay the image down on any drive. Even a mSD
card (as that is the actual boot device, but the Cubie uboot (and
linksprite) can run almost completely from a sata drive).
thanks
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