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Re: DD bs=4M option on USB mem-stick creates false format




"dd ... bs=4M" doesn't change the block size of the underlying device.
All it does is say that dd should copy in chunks of 4Mb. If the buffer
size is bigger, then dd spends more time copying and less time telling
the kernel to copy.


On 26/03/17 18:18, kAt wrote:
> dd if=/media/------/image.iso of=/dev/sdb bs=4M; sync
>
> the image works but the format of the drive seems false
> gparted when starting says that linux thinks it is a 256k block and not
> the 4m it indicates.  It shows on an 8G drive an empty space of 28G
>
> Is it the option of bs=4M that creates this problem. The free space can
> not be formatted and partitioned.  As Gparted tried to claim and format
> this space as a 6.7G which seemed right it crashed.
>
> Any advise would greatly be appreciated
> kAt-rin
>