[Info-vax] Error mounting system device after cluster creation

[Daniel Sundqvist]

Hi

I'm trying to form a cluster with two simh VAX machines running OpenVMS 7.3.

Following this guide: https://vanalboom.org/node/19

I successfully ran the procedure CLUSTER_CONFIG_LAN.COM and configured one master node and one slave node in accordance to the guide.

After reboot the slave node is showing this error message during startup: %SYSINIT-E, error mounting system device, status = 007280B4

The master node sees theese disk devices:
$1$DUA0:       (FRODO)  Mounted              0  VMSSYS         1572750   181   1
$1$DUA1:       (FRODO)  Mounted              0  DATA1          1853688     1   1
$1$DUA2:       (FRODO)  Mounted              0  DATA2          2940579     1   1
$1$DUA3:       (FRODO)  Online               0
$2$DUA0:      (GANDLF)  Online               0
$2$DUA1:      (GANDLF)  Online               0
$2$DUA2:      (GANDLF)  Online               0
$2$DUA3:      (GANDLF)  Online               0

I found some docs describing this problem but I don't understand what I must do to fix the problem.

"This error indicates that the system disk is already mounted in what appears to be another drive in the OpenVMS
Cluster system, so it is not mounted again. To solve this problem, check the controller letters and allocation class
values for each node on the shared SCSI bus."

What am i supposed to do? The system device has the same device name (DUA0) and probably also the same label as they were initialy copies of each other. But they obviously has diffrent ALLOCLASS according to the device output. Would it be enough to change the label?

Sorry for the noob questions but the OpenVMS community needs new blood ;)
Thanks!
Daniel