Public bug reported:

Problem:

After executing "rescan-scsi-bus.sh -a -r" on Ubuntu 22.04 VM installed
with image OS/Linux/Ubuntu/22.04/20220326/jammy-live-server-amd64.iso in
ESXi, all non loop devices were removed, and system crashed.

sg3-utils version is 1.46-1.

root@ubuntu:~# lsblk
NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
loop0                       7:0    0 43.6M  1 loop /snap/snapd/14978
loop1                       7:1    0 78.1M  1 loop /snap/lxd/22525
loop2                       7:2    0 61.9M  1 loop /snap/core20/1361
sda                         8:0    0   40G  0 disk 
├─sda1                      8:1    0    1M  0 part 
├─sda2                      8:2    0  1.5G  0 part /boot
└─sda3                      8:3    0 38.5G  0 part 
  └─ubuntu--vg-ubuntu--lv 253:0    0 19.2G  0 lvm  /
sr0                        11:0    1 1024M  0 rom  
sr1                        11:1    1 1024M  0 rom  

root@ubuntu:~# dpkg -l | grep sg3-utils
ii  sg3-utils                             1.46-1                             
amd64        utilities for devices using the SCSI command set
ii  sg3-utils-udev                        1.46-1                             
all          utilities for devices using the SCSI command set (udev rules)

root@ubuntu:~# rescan-scsi-bus.sh -a -r
Syncing file systems
Scanning SCSI subsystem for new devices and remove devices that have disappeared
Scanning host 0 for  SCSI target IDs 0
1
2
3
4
5
6
.....

two device(s) removed.
...

root@ubuntu:~# lsblk
NAME  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
loop0   7:0    0 43.6M  1 loop /snap/snapd/14978
loop1   7:1    0 78.1M  1 loop /snap/lxd/22525
loop2   7:2    0 61.9M  1 loop /snap/core20/1361


Steps:
 1) create VM with LSI Logic Parallel Disk and install guest OS 
jammy-desktop-amd64.iso daily build 26/Mar/2022 in ESXi 
 2) finish installation and reboot VM
 3) exec command "lsblk" in VM:
    root@ubuntu:~# lsblk
      NAME                      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
      loop0                       7:0    0 43.6M  1 loop /snap/snapd/14978
      loop1                       7:1    0 78.1M  1 loop /snap/lxd/22525
      loop2                       7:2    0 61.9M  1 loop /snap/core20/1361
      sda                         8:0    0   40G  0 disk 
      ├─sda1                      8:1    0    1M  0 part 
      ├─sda2                      8:2    0  1.5G  0 part /boot
      └─sda3                      8:3    0 38.5G  0 part 
       └─ubuntu--vg-ubuntu--lv 253:0    0 19.2G  0 lvm  /
      sr0                        11:0    1 1024M  0 rom  
      sr1                        11:1    1 1024M  0 rom  
 4) execute command "rescan-scsi-bus.sh -a -r" in VM and then "lsblk":
    
     root@ubuntu:~# lsblk
        NAME  MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
        loop0   7:0    0 43.6M  1 loop /snap/snapd/14978
        loop1   7:1    0 78.1M  1 loop /snap/lxd/22525
        loop2   7:2    0 61.9M  1 loop /snap/core20/1361

Issue: For step 4, we find the non loop disks are removed including the
boot disk sda.

** Affects: ubuntu
     Importance: Undecided
         Status: Confirmed

** Summary changed:

- hit issue with script rescan-scsi-bus.sh in ubuntu 22.04 live server
+ hit issue with script rescan-scsi-bus.sh in VM with image ubuntu 22.04 live 
server running in ESXi

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https://bugs.launchpad.net/bugs/1966860

Title:
  hit issue with script rescan-scsi-bus.sh in VM with image ubuntu 22.04
  live server running in ESXi

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