[16:51] <CarlFK> ubuntu install: juser@nk2:~$ sudo debconf-get-selections --installer |grep select_disk
[16:51] <CarlFK> partman-auto	partman-auto/select_disk	select
[16:51] <CarlFK> (good)
[16:51] <CarlFK> Debian stretch :  juser@val2:~$ sudo debconf-get-selections --installer |grep select_disk
[16:51] <CarlFK> partman-auto	partman-auto/select_disk	select	/var/lib/partman/devices/=dev=sda
[16:52] <CarlFK> that looks odd - should that be reported somewhere?
[22:43] <cjwatson> CarlFK: No, that seems perfectly fine.
[23:15] <CarlFK> cjwatson: k - thanks.
[23:17] <cjwatson> (partman-auto/select_disk isn't asked on every possible path through the partitioner)
[23:31] <CarlFK> What is this value about? 	/var/lib/partman/devices/=dev=sda
[23:41] <cjwatson> CarlFK: internal representation
[23:41] <cjwatson> that path exists during installation and stores various bits of metadata
[23:42] <cjwatson> but for preseeding you probably just want /dev/sda instead which IIRC is the documented form.  partman has lots of areas in which the values left in the debconf db after installation are not what you want to preseed
[23:43] <CarlFK> ah. neat.