Try 'nlvm rescan' and then check if 'nlvm list devices' is showing the added disk. If it is showing up then check 'nlvm list pools'. The pool(s) from the disk is(are) likely to show up in 'Active' state. Check if the volumes are also seen - 'nlvm list volumes'. However, the volumes are unlikely to be 'mounted'. With 'nssmu' try mounting the volumes.

Please do this with great care. Important: the old OES 6.5 are 32 bit and should not be mounted in continuous operation on OES 23X. Rights must be reconfigured and under no circumstances should NSS volume names be the same as the existing names of mounted volumes. I like to use a new system for such tasks, which I install for the tasks and remove from the tree with ndsconfig rm after the task is completed.

The whole thing here for VMware.

mount a copy of the virtual disk when OES23.x  is started.

Orientation what devices are available

# lsscsi
[1:0:0:0] cd/dvd NECVMWar VMware IDE CDR10 1.00 /dev/sr0
[2:0:0:0] disk VMware Virtual disk 1.0 /dev/sda
[2:0:1:0] disk VMware Virtual disk 1.0 /dev/sdb
[2:0:2:0] disk VMware Virtual disk 1.0 /dev/sdc

continue with

rescan-scsi-bus.sh --forcerescan

now continue with

# echo "- - -" > /sys/class/scsi_host/host0/scan
# echo "- - -" > /sys/class/scsi_host/host1/scan
# echo "- - -" > /sys/class/scsi_host/host2/scan
# echo "- - -" > /sys/class/scsi_host/host3/scan
.........

after how many disks have been mounted, the devices are under the path /sys.....

Now look in nssmu to see what is new. If there is a Novell NSS partition under Partition, this can then be mounted and entered in the NDS

There are other methods.With rsync or nbackup the data can then be moved from Novell NSS 6.5 to the desired server.
However, trusts are another topic.

Regards George