[dm-crypt] cryptsetup luksFormat with the size option

Robert Nichols rnicholsNOSPAM at comcast.net
Sun Feb 2 01:35:12 CET 2014

On 02/01/2014 06:18 PM, Arno Wagner wrote:
> On Sun, Feb 02, 2014 at 00:33:27 CET, Robert Nichols wrote:
>> On 02/01/2014 03:34 PM, Arno Wagner wrote:
>>> On Sat, Feb 01, 2014 at 21:50:19 CET, Matthew Thode wrote:
>>>> Am I correct in stating that setting --size=8 will make the sectors 4k
>>>> in size?  Also, how can I check what existing luks volumes are set to?
>>>> --
>>>> -- Matthew Thode
>>> No, you are not. As the man-page clearly states, this sets the
>>> size of the underlying device as multiple of 512B sectors.
>> I submit that for the luksFormat action, the --size option does _nothing_!
> Yes. Nor should it. See the man-page:
>    --size, -b <number of 512 byte sectors>
>           Force the size of the underlying device in sectors of 512 bytes.
>          This option is only relevant for the open and resize actions.
>                                               ^^^^     ^^^^^^
> I do not see why this is apparently a surprise to some....

I was just pointing it out in the context of this thread, where it was
not previously mentioned as meaningless.

Bob Nichols     "NOSPAM" is really part of my email address.
                 Do NOT delete it.

More information about the dm-crypt mailing list