Score:3

Phantom /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf on every boot

cn flag

I have several "phantom" /dev/sdX entries that don't point to any hardware:

~$ ls -l /dev/sd*
brw-rw---- 1 root disk 8,  0 May  3 11:04 /dev/sda
brw-rw---- 1 root disk 8,  1 May  3 11:04 /dev/sda1
brw-rw---- 1 root disk 8,  2 May  7 16:29 /dev/sda2
brw-rw---- 1 root disk 8, 16 May  7 16:11 /dev/sdb
brw-rw---- 1 root disk 8, 32 May  3 11:04 /dev/sdc
brw-rw---- 1 root disk 8, 48 May  3 11:04 /dev/sdd
brw-rw---- 1 root disk 8, 64 May  3 11:04 /dev/sde
brw-rw---- 1 root disk 8, 80 May  3 11:04 /dev/sdf

$ lsblk /dev/sdb
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sdb    8:16   1   0B  0 disk 

/dev/sdaX is real, but the others do not exist. There is nothing in dmesg or "fdisk -l" for any of them. When I insert a new USB drive, it gets assigned /dev/sdg.

What is causing these drives to appear, and how do I get rid of them? I'm using Ubuntu 22.04.

sudodus avatar
jp flag
Which version of Ubuntu are you running, what computer is it, and is there some card reader or some similar device connected? (I have a USB card reader that creates empty block devices like that.)
lord_nimon avatar
cn flag
That was it! I had a USB card reader attached that I completely completely forgot about. If you post that as an answer, I will give you credit.
Score:3
jp flag

I have a USB card reader that creates empty block devices like that. So please check if you have a card reader, USB hub or similar device connected.

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