Submission type

• Bug report
• Request for enhancement (RFE)

systemd version the issue has been seen with

systemd-233-3.fc26.armv7hl

Used distribution

Fedora 26 armv7hl

In case of bug report: Unexpected behaviour you saw

systemd-gpt-auto-generator[1765]: Failed to dissect: Input/output error

In case of bug report: Steps to reproduce the problem

I'm using a GPT partition layout on the Toshiba AC100 ARM device. It use a NVIDIA tegra20 SOC and the rootfs is located on a 16G eMMC. In this case the bootloader (upstream uboot) is located in the boot area of the eMMC. (/dev/mmcblk1boot1 and /dev/mmcblk1boot2).
I expect this might be the problem for the failure to dissect the partition layout.

The other candidate for the failure is also the availability of /dev/mmcblk1rpmb
(see https://lwn.net/Articles/682276/ )

LANG=C fdisk -l -o "Device,Start,End,Sectors,Size,Type,Type-UUID,Attrs,Name,UUID"
Disk /dev/mmcblk1: 15 GiB, 16055795712 bytes, 31358976 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 3A26EA3C-EAB6-4124-853C-E7AADD7948E2

Device Start End Sectors Size Type Type-UUID Attrs Name UUID
/dev/mmcblk1p1 2048 1026047 1024000 500M Linux filesystem 0FC63DAF-8483-4772-8E79-3D69D8477DE4 3E410973-BADE-46FD-9255-3EEB76EEDFD8
/dev/mmcblk1p2 1026048 15706111 14680064 7G Linux filesystem 0FC63DAF-8483-4772-8E79-3D69D8477DE4 A065B4FD-AD31-422B-A61E-6A5214A4A95C
/dev/mmcblk1p3 15706112 16730111 1024000 500M Linux filesystem 0FC63DAF-8483-4772-8E79-3D69D8477DE4 0EB211F3-64CC-4FCE-95D5-92644A8A1DFB
/dev/mmcblk1p4 16730112 31358942 14628831 7G Linux filesystem 0FC63DAF-8483-4772-8E79-3D69D8477DE4 531DBE8A-F643-4C3A-8F08-3C3851069815

Disk /dev/mmcblk1boot1: 2 MiB, 2097152 bytes, 4096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mmcblk1boot0: 2 MiB, 2097152 bytes, 4096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes