On Mon, May 04, 2020 at 12:19:43PM +0200, Chris Hofstaedtler <z...@debian.org> wrote: > > partitions on the same disk it is unlikely to be caused by something weird > > in the partition tables. That, or the algorithm is completely hosed, as it > > shouldn't depend on the partition at all, only on the disk. > > Well, I tried recreating your setup on a loop blockdev, and it works > for me:
Studying the manpage, I tried LSBLK_DEBUG, and I think it gives a good hint: http://data.plan9.de/lsblkbug.txt 539: lsblk: DEV: [0x555555596de0]: add 'sda3' to scols 539: lsblk: DEV: [0x555555596de0]: refer data[0]="/dev/sda3" 539: lsblk: DEV: [0x555555596de0]: refer data[1]="sda3" 539: lsblk: DEV: [0x555555596de0]: refer data[2]=" 8:3 " 539: lsblk: DEV: [0x555555596de0]: refer data[3]="part" 539: lsblk: DEV: [0x555555596de0]: /dev/sda3: properties requested 539: lsblk: DEV: [0x555555596de0]: sda3: found udev properties 539: lsblk: DEV: [0x555555596de0]: from udev 539: lsblk: DEV: [0x555555596de0]: refer data[4]="dos" I don't know how to exactly interpret this, but it seems this info comes from udev. And indeed: udevadm info /dev/sda3 [...] E: ID_PART_TABLE_UUID=81be6e1d-066c-45eb-a13d-53fc8e4730bd E: ID_PART_TABLE_TYPE=dos So maybe this is a bug in udev (otoh, udev might use blkid, I have no clue :). [... later ...] poking around in systemd sources, it does use blkid, although it is not clear to me whether it uses libblkid or rolls it's own, but util-linux's blkid also says PTTYPE="dos". Deleting /run/blkid/blkid.tab and running blkid with doesn't show anything obvious to me (http://data.plan9.de/blkidbug.txt), except that it wrongly detetcs pttype as dos: 3900: libblkid: LOWPROBE: Resetting partitions values 3900: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1] 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: LOWPROBE: magic sboff=510, kboff=0 3900: libblkid: LOWPROBE: dos: ---> call probefunc() 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: LOWPROBE: magic sboff=0, kboff=0 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 3900: libblkid: LOWPROBE: returning TYPE value 3900: libblkid: LOWPROBE: dos: <--- (rc = 0) 3900: libblkid: LOWPROBE: assigning PTTYPE [partitions] 3900: libblkid: LOWPROBE: <-- leaving probing loop (type=dos) [PARTS idx=3] 3900: libblkid: LOWPROBE: parts: start probing for partition entry 3900: libblkid: DEVNO: found devno 0x0800 as /dev/sda 3900: libblkid: LOWPROBE: allocate a wholedisk probe 3900: libblkid: LOWPROBE: allocate a new probe 3900: libblkid: LOWPROBE: zeroize wiper 3900: libblkid: LOWPROBE: ready for low-probing, offset=0, size=2000398934016 3900: libblkid: LOWPROBE: whole-disk: YES, regfile: NO 3900: libblkid: LOWPROBE: partlist reset 3900: libblkid: LOWPROBE: parts: initialized partitions list (size=0) 3900: libblkid: LOWPROBE: --> starting probing loop [PARTS idx=-1] 3900: libblkid: LOWPROBE: read: off=0 len=1024 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=1024) 3900: libblkid: LOWPROBE: magic sboff=510, kboff=0 3900: libblkid: LOWPROBE: dos: ---> call probefunc() 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 3900: libblkid: LOWPROBE: probably GPT -- ignore 3900: libblkid: LOWPROBE: dos: <--- (rc = 1) 3900: libblkid: LOWPROBE: gpt: ---> call probefunc() 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=0 len=512) 3900: libblkid: LOWPROBE: #1 valid PMBR partition 3900: libblkid: LOWPROBE: checking for GPT header at 1 3900: libblkid: BUFFER: reuse: off=0 len=1024 (for off=512 len=512) 3900: libblkid: LOWPROBE: read: off=1024 len=16384 3900: libblkid: LOWPROBE: parts: create a new partition table (type=gpt, offset=512) 3900: libblkid: LOWPROBE: parts: add partition (start=2048, size=524288) 3900: libblkid: LOWPROBE: parts: add partition (start=526336, size=3565158400) 3900: libblkid: LOWPROBE: parts: add partition (start=3565684736, size=341344399) 3900: libblkid: LOWPROBE: gpt: <--- (rc = 0) 3900: libblkid: LOWPROBE: <-- leaving probing loop (type=gpt) [PARTS idx=4] 3900: libblkid: LOWPROBE: partitions probe done [rc=0] 3900: libblkid: LOWPROBE: returning partitions binary data 3900: libblkid: LOWPROBE: trying to convert devno 0x803 to partition 3900: libblkid: LOWPROBE: searching by offset/size 3900: libblkid: LOWPROBE: assigning PART_ENTRY_SCHEME [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_NAME [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_UUID [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_TYPE [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_NUMBER [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_OFFSET [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_SIZE [partitions] 3900: libblkid: LOWPROBE: assigning PART_ENTRY_DISK [partitions] 3900: libblkid: LOWPROBE: parts: end probing for partition entry [success] 3900: libblkid: LOWPROBE: partitions probe done [rc=0] 3900: libblkid: LOWPROBE: end probe 3900: libblkid: LOWPROBE: zeroize wiper 3900: libblkid: LOWPROBE: returning LABEL value 3900: libblkid: TAG: [0x55555557ab40]: alloc 3900: libblkid: TAG: [0x55555557ab40]: setting (LABEL) 'SSDCER' 3900: libblkid: TAG: [0x55555557aba0]: alloc 3900: libblkid: TAG: [0x55555557aba0]: creating new cache tag head LABEL 3900: libblkid: LOWPROBE: returning UUID value 3900: libblkid: TAG: [0x55555557ac20]: alloc 3900: libblkid: TAG: [0x55555557ac20]: setting (UUID) '25E09C2A0B0B294A' 3900: libblkid: TAG: [0x55555557ac80]: alloc 3900: libblkid: TAG: [0x55555557ac80]: creating new cache tag head UUID 3900: libblkid: LOWPROBE: returning TYPE value 3900: libblkid: TAG: [0x55555557ad00]: alloc 3900: libblkid: TAG: [0x55555557ad00]: setting (TYPE) 'ntfs' 3900: libblkid: TAG: [0x55555557ad60]: alloc 3900: libblkid: TAG: [0x55555557ad60]: creating new cache tag head TYPE 3900: libblkid: LOWPROBE: returning PTTYPE value 3900: libblkid: TAG: [0x55555557ade0]: alloc 3900: libblkid: TAG: [0x55555557ade0]: setting (PTTYPE) 'dos' 3900: libblkid: TAG: [0x55555557ae40]: alloc 3900: libblkid: TAG: [0x55555557ae40]: creating new cache tag head PTTYPE This is all I can provide for the moment. -- The choice of a Deliantra, the free code+content MORPG -----==- _GNU_ http://www.deliantra.net ----==-- _ generation ---==---(_)__ __ ____ __ Marc Lehmann --==---/ / _ \/ // /\ \/ / schm...@schmorp.de -=====/_/_//_/\_,_/ /_/\_\
