Dump(8) does not do incremental

[Warren Block]

On Thu, 2 Apr 2015, Olivier Nicole wrote:

> Hello,
>
> Is there any reason why dump would not do incremental when used with -f -?
>
> I do a full dump:
>
> # ssh root at 192.41.170.38 "dump -f - -L /dev/da1s1d" | restore -r -f -
> Password:
>  DUMP: Date of this level 0 dump: Thu Apr  2 10:48:58 2015
>  DUMP: Date of last level 0 dump: the epoch
>
> followed by an incremental one:
>
> # ssh root at 192.41.170.38 "dump -1 -f - -L /dev/da1s1d" | restore -r -f -
> Password:
>  DUMP: Date of this level 1 dump: Thu Apr  2 12:35:23 2015
>  DUMP: Date of last level 0 dump: the epoch
>
> The level 0 is always shown at the epoch.
>
> I may be missing something but I don't see what.

-u to update /etc/dumpdates after a success?