Turns out that ominous usb device has an entry in /etc/crypttab
cr_sda2 UUID=7f99168c-4972-468b-900f-fb5bbfb90e66
cr_usb-General_USB_Flash_Disk_0349315060001623-0:0-part2 UUID=00a69115-956d-41b3-83
Starting Switch Root...
[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (1 of 3) A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (19s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (1 of 3) A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (20s / 1min 30$
^[[K[^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (2 of 3) A start job is running for Cryptography Setup for cr_sda2 (14s / no limit)
^[[K[^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (2 of 3) A start job is running for Cryptography Setup for cr_sda2 (15s / no limit)
^[[K[^[[0m^[[0;31m* ^[[0m] (2 of 3) A start job is running for Cryptography Setup for cr_sda2 (15s / no limit)
^[[K[^[[0;32m OK ^[[0m] Found device /dev/disk/by-uuid/3f9a66f0-dea7-4d5d-a200-bd1033718af8.
[^[[0;32m OK ^[[0m] Started Cryptography Setup for cr_sda2.
Starting File System Check on /dev/disk/by-uuid/3f9a66f0-dea7-4d5d-a200-bd1033718af8...
[^[[0;32m OK ^[[0m] Started File System Check on /dev/disk/by-uuid/3f9a66f0-dea7-4d5d-a200-bd1033718af8.
Mounting /home...
[^[[0;32m OK ^[[0m] Mounted /home.
[^[[0;32m OK ^[[0m] Reached target Local File Systems.
Starting Restore /run/initramfs on shutdown...
Starting Create Volatile Files and Directories...
Starting Tell Plymouth To Write Out Runtime Data...
[^[[0;32m OK ^[[0m] Started Tell Plymouth To Write Out Runtime Data.
[^[[0;32m OK ^[[0m] Started Restore /run/initramfs on shutdown.
[^[[0;32m OK ^[[0m] Started Create Volatile Files and Directories.
Starting Security Auditing Service...
[^[[0;32m OK ^[[0m] Started Security Auditing Service.
Starting Update UTMP about System Boot/Shutdown...
[^[[0;32m OK ^[[0m] Started Update UTMP about System Boot/Shutdown.
^[[K[ ^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 22s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 23s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 23s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 24s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 24s / 1min 30s)
^[[K[^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 25s / 1min 30s)
^[[K[^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 25s / 1min 30s)
^[[K[^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 26s / 1min 30s)
^[[K[^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 26s / 1min 30s)
^[[K[^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 27s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 27s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 28s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 28s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 29s / 1min 30s)
^[[K[ ^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 29s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 30s / 1min 30s)
^[[K[^[[0;1;31m TIME ^[[0m] Timed out waiting for device dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device.
[^[[0;1;33mDEPEND^[[0m] Dependency failed for Cryptography Setup for cr_usb-General_USB_Flash_Disk_0349315060001623-0:0-part2.
[^[[0;1;33mDEPEND^[[0m] Dependency failed for Encrypted Volumes.
[^[[0;32m OK ^[[0m] Reached target System Initialization.
UUID=7b4cf082-a27d-458a-b92b-bc4eb3f81dc5 / ext4 acl,user_xattr 0 1
UUID=35de195e-c983-4f53-9ef2-f3e9f42539e7 swap swap defaults 0 0
UUID=1f987306-6da7-4393-b1cb-eb9c541da80c /boot ext4 data=ordered,acl,user_xattr 0 2
UUID=3f9a66f0-dea7-4d5d-a200-bd1033718af8 /home ext4 data=ordered,acl,user_xattr 0 2
UUID=3DC1-430C /boot/efi vfat defaults 0 0
ls -l /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root 10 Nov 29 08:59 1f987306-6da7-4393-b1cb-eb9c541da80c -> ../../sdb3
lrwxrwxrwx 1 root root 10 Nov 29 08:59 35de195e-c983-4f53-9ef2-f3e9f42539e7 -> ../../sda3
lrwxrwxrwx 1 root root 10 Nov 29 08:59 3DC1-430C -> ../../sdb1
lrwxrwxrwx 1 root root 10 Nov 29 08:25 3f9a66f0-dea7-4d5d-a200-bd1033718af8 -> ../../dm-0
lrwxrwxrwx 1 root root 15 Nov 29 08:59 77FB-45CC -> ../../mmcblk0p1
lrwxrwxrwx 1 root root 10 Nov 29 08:59 7b4cf082-a27d-458a-b92b-bc4eb3f81dc5 -> ../../sda1
lrwxrwxrwx 1 root root 10 Nov 29 08:59 7f99168c-4972-468b-900f-fb5bbfb90e66 -> ../../sda2
UUID=7b4cf082-a27d-458a-b92b-bc4eb3f81dc5 / ext4 acl,user_xattr 0 1
UUID=35de195e-c983-4f53-9ef2-f3e9f42539e7 swap swap defaults 0 0
UUID=1f987306-6da7-4393-b1cb-eb9c541da80c /boot ext4 data=ordered,acl,user_xattr 0 2
UUID=3f9a66f0-dea7-4d5d-a200-bd1033718af8 /home ext4 data=ordered,acl,user_xattr 0 2
UUID=3DC1-430C /boot/efi vfat defaults 0 0
Starting Switch Root...
[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (1 of 3) A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (19s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (1 of 3) A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (20s / 1min 30$
^[[K[^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (2 of 3) A start job is running for Cryptography Setup for cr_sda2 (14s / no limit)
^[[K[^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] (2 of 3) A start job is running for Cryptography Setup for cr_sda2 (15s / no limit)
^[[K[^[[0m^[[0;31m* ^[[0m] (2 of 3) A start job is running for Cryptography Setup for cr_sda2 (15s / no limit)
^[[K[^[[0;32m OK ^[[0m] Found device /dev/disk/by-uuid/3f9a66f0-dea7-4d5d-a200-bd1033718af8.
[^[[0;32m OK ^[[0m] Started Cryptography Setup for cr_sda2.
Starting File System Check on /dev/disk/by-uuid/3f9a66f0-dea7-4d5d-a200-bd1033718af8...
[^[[0;32m OK ^[[0m] Started File System Check on /dev/disk/by-uuid/3f9a66f0-dea7-4d5d-a200-bd1033718af8.
Mounting /home...
[^[[0;32m OK ^[[0m] Mounted /home.
[^[[0;32m OK ^[[0m] Reached target Local File Systems.
Starting Restore /run/initramfs on shutdown...
Starting Create Volatile Files and Directories...
Starting Tell Plymouth To Write Out Runtime Data...
[^[[0;32m OK ^[[0m] Started Tell Plymouth To Write Out Runtime Data.
[^[[0;32m OK ^[[0m] Started Restore /run/initramfs on shutdown.
[^[[0;32m OK ^[[0m] Started Create Volatile Files and Directories.
Starting Security Auditing Service...
[^[[0;32m OK ^[[0m] Started Security Auditing Service.
Starting Update UTMP about System Boot/Shutdown...
[^[[0;32m OK ^[[0m] Started Update UTMP about System Boot/Shutdown.
^[[K[ ^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 22s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 23s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 23s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 24s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 24s / 1min 30s)
^[[K[^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 25s / 1min 30s)
^[[K[^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 25s / 1min 30s)
^[[K[^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 26s / 1min 30s)
^[[K[^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 26s / 1min 30s)
^[[K[^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 27s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 27s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m* ^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 28s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 28s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 29s / 1min 30s)
^[[K[ ^[[0;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 29s / 1min 30s)
^[[K[ ^[[0;31m*^[[0;1;31m*^[[0m] A start job is running for dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device (1min 30s / 1min 30s)
^[[K[^[[0;1;31m TIME ^[[0m] Timed out waiting for device dev-disk-by\x2duuid-00a69115\x2d956d\x2d41b3\x2d830c\x2d9a3878087d41.device.
[^[[0;1;33mDEPEND^[[0m] Dependency failed for Cryptography Setup for cr_usb-General_USB_Flash_Disk_0349315060001623-0:0-part2.
[^[[0;1;33mDEPEND^[[0m] Dependency failed for Encrypted Volumes.
[^[[0;32m OK ^[[0m] Reached target System Initialization.
UUID=7b4cf082-a27d-458a-b92b-bc4eb3f81dc5 / ext4 acl,user_xattr 0 1
UUID=35de195e-c983-4f53-9ef2-f3e9f42539e7 swap swap defaults 0 0
UUID=1f987306-6da7-4393-b1cb-eb9c541da80c /boot ext4 data=ordered,acl,user_xattr 0 2
UUID=3f9a66f0-dea7-4d5d-a200-bd1033718af8 /home ext4 data=ordered,acl,user_xattr 0 2
UUID=3DC1-430C /boot/efi vfat defaults 0 0
ls -l /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root 10 Nov 29 08:59 1f987306-6da7-4393-b1cb-eb9c541da80c -> ../../sdb3
lrwxrwxrwx 1 root root 10 Nov 29 08:59 35de195e-c983-4f53-9ef2-f3e9f42539e7 -> ../../sda3
lrwxrwxrwx 1 root root 10 Nov 29 08:59 3DC1-430C -> ../../sdb1
lrwxrwxrwx 1 root root 10 Nov 29 08:25 3f9a66f0-dea7-4d5d-a200-bd1033718af8 -> ../../dm-0
lrwxrwxrwx 1 root root 15 Nov 29 08:59 77FB-45CC -> ../../mmcblk0p1
lrwxrwxrwx 1 root root 10 Nov 29 08:59 7b4cf082-a27d-458a-b92b-bc4eb3f81dc5 -> ../../sda1
lrwxrwxrwx 1 root root 10 Nov 29 08:59 7f99168c-4972-468b-900f-fb5bbfb90e66 -> ../../sda2
Boot delay due to systemd device start job timeout
##Problem description
I've taken to finally address the issue of my system booting slower than it should. My first step was to have a look at the boot log, which showed the start job for a device timing out and directly afterwards failing the cryptography setup of a device referenced as cr_usb-General_USB_Flash_Disk. I am unsure whether the two are connected.
This is particularly odd, as there is no usb drive connected to my system.
I found the corresponding device service in systemd (pastebin link, see line 67), however I am unable to tell what exactly this device is or why it is there to begin with.
##Questions
How can I determine what device this is?
Can it be safely removed from startup and if so, how?
##Similar problems
While researching this I came across several posts that describe similar symptoms but apparently with different causes. Examples of these are this blog entry and this question on Superuser SE, both tracking this issue to a faulty swap partition / entry in fstab. The excerpt from the bootlog however leads me to believe that these are not related to my particular problem.
##System information
General info
I'm running OpenSUSE Leap 15 with an HDD (sda), an SSD (sdb)and an sd card (mmcblk0) connected.
blkid
/dev/sda1: UUID="7b4cf082-a27d-458a-b92b-bc4eb3f81dc5" TYPE="ext4" PARTUUID="b9b6e898-306d-4834-bc40-b06a0b05c255"
/dev/sda2: UUID="7f99168c-4972-468b-900f-fb5bbfb90e66" TYPE="crypto_LUKS" PARTUUID="eda06af5-b65d-4a41-88f3-76c884eda694"
/dev/sda3: UUID="35de195e-c983-4f53-9ef2-f3e9f42539e7" TYPE="swap" PARTUUID="15489cc9-d2c6-4446-b7fc-0efdb26c3dfe"
/dev/sdb1: UUID="3DC1-430C" TYPE="vfat" PARTUUID="7093ce52-e282-45ef-a09a-b19eb54a268e"
/dev/sdb3: UUID="1f987306-6da7-4393-b1cb-eb9c541da80c" TYPE="ext4" PARTUUID="96e413c8-1b55-4383-87f1-5c2094c27b47"
/dev/mmcblk0p1: UUID="77FB-45CC" TYPE="vfat" PARTUUID="09b07cfe-1f9b-40e9-aa52-27892b6971ff"
/dev/mapper/cr_sda2: UUID="3f9a66f0-dea7-4d5d-a200-bd1033718af8" TYPE="ext4"
/dev/mmcblk0: PTUUID="21d3220a-de4c-4f1c-9abc-e57d62434b4e" PTTYPE="gpt"
/etc/fstab
UUID=7b4cf082-a27d-458a-b92b-bc4eb3f81dc5 / ext4 acl,user_xattr 0 1
UUID=35de195e-c983-4f53-9ef2-f3e9f42539e7 swap swap defaults 0 0
UUID=1f987306-6da7-4393-b1cb-eb9c541da80c /boot ext4 data=ordered,acl,user_xattr 0 2
UUID=3f9a66f0-dea7-4d5d-a200-bd1033718af8 /home ext4 data=ordered,acl,user_xattr 0 2
UUID=3DC1-430C /boot/efi vfat defaults 0 0