Re: Volume ID with mkfs.msdos

[Roland Clobus <rclobus@rclobus.nl>]

Hello,

On 16/02/2021 08:43, intrigeri wrote:
> FWIW, in case it may help, here's how we create a the Tails FAT
> filesystem reproducibly (pasting Python code as-is):
> 
>         execute([
>             'mkfs.msdos',
>             '-v',
>             # Use constants for normally randomly generated or time-based data
>             # such as volume ID and creation time
>             '--invariant',
>             # Fill all 11 chars of the volume label to avoid any uninitialized
>             # memory from sneaking in
>             '-n', 'TAILS' + 6 * ' ',
>             self.partition.props.block.props.device,
>         ])

I've decided not to use --invariant, because Thomas Schmitt wrote that
it is important to have unique IDs for /dev/disk/by-label.
So I've converted the SOURCE_DATE_EPOCH to hex (which is 32bit until
2038) [which I should have done when I introduced the -i command line
argument. :-) ]

See MR243 https://salsa.debian.org/live-team/live-build/-/merge_requests/243

With kind regards,
Roland Clobus