I retried the same when running udisksd without --no-debug. The journal (for the partition+FS creation) says:
Oct 26 11:29:02 sid-desktop kernel: sda: sda1 Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.286:[1790]:[DEBUG]: uevent change /sys/devices/pci0000:00/0000:00:01.2/usb1/1-2/1-2.2/1-2.2:1.0/host8/target8:0:0/8:0:0:0/block/sda [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()] Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.287:[1795]:[INFO]: Cleanup check start [udisksstate.c:419, udisks_state_check_in_thread()] Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.287:[1795]:[INFO]: Cleanup check end [udisksstate.c:457, udisks_state_check_in_thread()] Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.771:[1790]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:01.2/usb1/1-2/1-2.2/1-2.2:1.0/host8/target8:0:0/8:0:0:0/block/sda/sda1 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()] Oct 26 11:29:03 sid-desktop kernel: sda: sda1 Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.817:[1790]:[DEBUG]: uevent remove /sys/devices/pci0000:00/0000:00:01.2/usb1/1-2/1-2.2/1-2.2:1.0/host8/target8:0:0/8:0:0:0/block/sda/sda1 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()] Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.817:[1795]:[INFO]: Cleanup check start [udisksstate.c:419, udisks_state_check_in_thread()] Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.818:[1795]:[INFO]: Cleanup check end [udisksstate.c:457, udisks_state_check_in_thread()] Oct 26 11:29:04 sid-desktop udisksd[1790]: 11:29:04.416:[1790]:[DEBUG]: uevent change /sys/devices/pci0000:00/0000:00:01.2/usb1/1-2/1-2.2/1-2.2:1.0/host8/target8:0:0/8:0:0:0/block/sda [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()] Oct 26 11:29:04 sid-desktop udisksd[1790]: 11:29:04.416:[1795]:[INFO]: Cleanup check start [udisksstate.c:419, udisks_state_check_in_thread()] Oct 26 11:29:04 sid-desktop udisksd[1790]: 11:29:04.416:[1795]:[INFO]: Cleanup check end [udisksstate.c:457, udisks_state_check_in_thread()] Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.004:[1790]:[DEBUG]: uevent change /sys/devices/pci0000:00/0000:00:01.2/usb1/1-2/1-2.2/1-2.2:1.0/host8/target8:0:0/8:0:0:0/block/sda [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()] Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.004:[1795]:[INFO]: Cleanup check start [udisksstate.c:419, udisks_state_check_in_thread()] Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.004:[1795]:[INFO]: Cleanup check end [udisksstate.c:457, udisks_state_check_in_thread()] Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.482:[1790]:[DEBUG]: uevent add /sys/devices/pci0000:00/0000:00:01.2/usb1/1-2/1-2.2/1-2.2:1.0/host8/target8:0:0/8:0:0:0/block/sda/sda1 [udiskslinuxprovider.c:902, udisks_linux_provider_handle_uevent()]
I retried the same when running udisksd without --no-debug. The journal (for the partition+FS creation) says:
Oct 26 11:29:02 sid-desktop kernel: sda: sda1 286:[1790] :[DEBUG] : uevent change /sys/devices/ pci0000: 00/0000: 00:01.2/ usb1/1- 2/1-2.2/ 1-2.2:1. 0/host8/ target8: 0:0/8:0: 0:0/block/ sda [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 287:[1795] :[INFO] : Cleanup check start [udisksstate.c:419, udisks_ state_check_ in_thread( )] 287:[1795] :[INFO] : Cleanup check end [udisksstate.c:457, udisks_ state_check_ in_thread( )] 771:[1790] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:01.2/ usb1/1- 2/1-2.2/ 1-2.2:1. 0/host8/ target8: 0:0/8:0: 0:0/block/ sda/sda1 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 817:[1790] :[DEBUG] : uevent remove /sys/devices/ pci0000: 00/0000: 00:01.2/ usb1/1- 2/1-2.2/ 1-2.2:1. 0/host8/ target8: 0:0/8:0: 0:0/block/ sda/sda1 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 817:[1795] :[INFO] : Cleanup check start [udisksstate.c:419, udisks_ state_check_ in_thread( )] 818:[1795] :[INFO] : Cleanup check end [udisksstate.c:457, udisks_ state_check_ in_thread( )] 416:[1790] :[DEBUG] : uevent change /sys/devices/ pci0000: 00/0000: 00:01.2/ usb1/1- 2/1-2.2/ 1-2.2:1. 0/host8/ target8: 0:0/8:0: 0:0/block/ sda [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 416:[1795] :[INFO] : Cleanup check start [udisksstate.c:419, udisks_ state_check_ in_thread( )] 416:[1795] :[INFO] : Cleanup check end [udisksstate.c:457, udisks_ state_check_ in_thread( )] 004:[1790] :[DEBUG] : uevent change /sys/devices/ pci0000: 00/0000: 00:01.2/ usb1/1- 2/1-2.2/ 1-2.2:1. 0/host8/ target8: 0:0/8:0: 0:0/block/ sda [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )] 004:[1795] :[INFO] : Cleanup check start [udisksstate.c:419, udisks_ state_check_ in_thread( )] 004:[1795] :[INFO] : Cleanup check end [udisksstate.c:457, udisks_ state_check_ in_thread( )] 482:[1790] :[DEBUG] : uevent add /sys/devices/ pci0000: 00/0000: 00:01.2/ usb1/1- 2/1-2.2/ 1-2.2:1. 0/host8/ target8: 0:0/8:0: 0:0/block/ sda/sda1 [udiskslinuxpro vider.c: 902, udisks_ linux_provider_ handle_ uevent( )]
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:03 sid-desktop kernel: sda: sda1
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:03 sid-desktop udisksd[1790]: 11:29:03.
Oct 26 11:29:04 sid-desktop udisksd[1790]: 11:29:04.
Oct 26 11:29:04 sid-desktop udisksd[1790]: 11:29:04.
Oct 26 11:29:04 sid-desktop udisksd[1790]: 11:29:04.
Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.
Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.
Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.
Oct 26 11:29:05 sid-desktop udisksd[1790]: 11:29:05.