# cat /etc/SuSE-release 
SUSE Linux Enterprise Server 10 (x86_64)
VERSION = 10
# cat /etc/fstab 
/dev/sda2            /                    reiserfs   acl,user_xattr        1 1
/dev/sda1            swap                 swap       defaults              0 0
proc                 /proc                proc       defaults              0 0
sysfs                /sys                 sysfs      noauto                0 0
debugfs              /sys/kernel/debug    debugfs    noauto                0 0
devpts               /dev/pts             devpts     mode=0620,gid=5       0 0

# virt-v2v -ic vpx://non-admin%40vsphere.local@10.73.212.129/data/10.73.212.36/?no_verify=1  -it vddk -io vddk-libdir=/home/vddk9.0.0  -io vddk-thumbprint=CB:9F:B1:9D:33:49:6C:60:AD:3C:A5:16:77:91:5F:CD:1B:24:B1:43 -ip /home/passwd  esx8.0-sles10-x86_64-with-reiserfs
[   0.1] Setting up the source: -i libvirt -ic vpx://non-admin%40vsphere.local@10.73.212.129/data/10.73.212.36/?no_verify=1 -it vddk esx8.0-sles10-x86_64-with-reiserfs
[   1.8] Opening the source
[  17.5] Checking filesystem integrity before conversion
[  18.0] Detecting if this guest uses BIOS or UEFI to boot
[  18.2] Inspecting the source
virt-v2v: error: inspection could not detect the source guest (or physical 
machine) operating system.
Assuming that you are running virt-v2v/virt-p2v on a source which is 
supported (and not, for example, a blank disk), then this should not 
happen.
No root device found in this operating system image.
If reporting bugs, run virt-v2v with debugging enabled and include the 
complete output:
  virt-v2v -v -x [...]