Re: kern/54882: Stange default disklabels generated for non-512 byte disks

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR kern/54882; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/54882: Stange default disklabels generated for non-512 byte
 disks
Date: Wed, 22 Jan 2020 10:46:37 +0100

 On Wed, Jan 22, 2020 at 09:40:02AM +0000, Michael van Elst wrote:
 >  That part apparently is not so "historical" as the code talks about
 >  "lack of disklabel is common" and "lack of disklabel" does not
 >  trigger that behaviour.
 >  
 >  You should see an error message printed by the kernel why readdisklabel()
 >  failed.
 
 Duh - indeed. There was a bogus MBR in the image file:
 
 vnd0: mbr partition exceeds disk size
 
 removing that makes the symptom go away and I get a "sane" fictious label
 (only a and d partition).
 
 >  Does this happen with a 4k (not 512e) disk for the underlying filesystem ?
 
 No, the filsystem is on a 512 byte block disk.
 
 Martin