Stopping DRBD so I can run some tests with a VM

We have two servers I inherited, both running DRBD and each then running KVM virtual machines.

I would love to stop a VM running on server1, and bring up just the 1 VM on server2 for some tests. Though with DRBD doing its thing on these servers and the broken startup script (posted here) I have from server2, it makes me nervous as I don't want to stop fully server1, just the one vm on it. I didn't create or configure these machines and I am in doubt weather the DRBD (Which I know little about) was fully properly implemented. Server1's stop script is posted and servers2 start script is posted here to.

But before all that, I guess I just want to know how to stop safely drbd from mucking with the two servers for a time. So that I can mount a file system on server2, and bring up a VM that I stopped on server1.

Server1 site stop script:

echo    poweroff -p now
echo
read -rsp $'Press any key to continue...\n' -n1 key

virsh shutdown irsc
virsh shutdown backup
virsh shutdown user
virsh shutdown repository
virsh shutdown web-firewall
virsh shutdown wiki
virsh shutdown a-gateway
virsh shutdown b-gateway
virsh shutdown dhcp
 
# shutdown the drbd
#drbd-stop
echo now manually turn off drbd
echo     umount /systems
echo     drbdadm secondary all
echo     drbd-overview

Why the drbd-stop is commented out no idea, and why it echos things it should be doing? I have no idea. But okay, so thats the stop script. Server1's img files for the KVM live in /systems btw.

So I goto server 2. First issue: the /systems folder has no img files in it, but there is a mount line in the startup script. Here is the start-script for server2: (I have no idea what the nodedev-detach pci is really doing.)

#!/bin/sh
# isolate the CPUs for the VMs
#site-isolate

# backup 192 network
virsh nodedev-detach pci_0000_06_10_2
# 10.7
virsh nodedev-detach pci_0000_02_10_0
# 10.5
virsh nodedev-detach pci_0000_06_10_3
# 10.2
virsh nodedev-detach pci_0000_02_10_1

# a-gateway
# 192
virsh nodedev-detach pci_0000_06_10_0
# 10.5
virsh nodedev-detach pci_0000_06_10_1
# 10.7
virsh nodedev-detach pci_0000_02_10_4

# b-gateway
# 192
virsh nodedev-detach pci_0000_06_10_4
# 10.2
virsh nodedev-detach pci_0000_02_10_5

# dhcp
# 10.5
virsh nodedev-detach pci_0000_06_10_7
# 10.7
virsh nodedev-detach pci_0000_02_11_0
# 10.2
virsh nodedev-detach pci_0000_02_11_1

# dns2
# 192
virsh nodedev-detach pci_0000_06_11_0

# web-server
# 10.7
virsh nodedev-detach pci_0000_02_11_4

# web-firewall
# 192
virsh nodedev-detach pci_0000_06_10_6
# 10.7
virsh nodedev-detach pci_0000_02_12_4
# 10.2
virsh nodedev-detach pci_0000_02_11_5

# irsc
# 10.7
virsh nodedev-detach pci_0000_02_13_0
# BTTV
virsh nodedev-detach pci_0000_09_00_0

# firewall
# 10.25
virsh nodedev-detach pci_0000_02_12_1
# 10.5
virsh nodedev-detach pci_0000_06_11_1

# bro-server
# 192
virsh nodedev-detach pci_0000_06_11_2

echo start drbd
# start the disk mirror with the slave
service drbd start
sleep 2

# now setup drbd and filesystems

# for all VM images, mount the /systems
drbdadm primary systems
mount /dev/drbd/by-res/systems /systems

# for arc-gateway
drbdadm primary arc-gateway-data

# for backup
drbdadm primary archive
drbdadm primary amanda

# for user computer
# for user computer
drbdadm primary users

# for web server computer
drbdadm primary web-server

# for wiki
drbdadm primary svn

# for irsc. *** this is the one I want to bring up?  do I have to do this drbdadm primary irsc
drbdadm primary irsc

echo start vms
# start the VMs
# fundamental servers
virsh start dns2
virsh start dhcp
# take a long time to start servers
virsh start devel1
virsh start xmail
# gateways, sdss-gateway takes a long time
virsh start sdss-gateway
virsh start arc-gateway
virsh start user
# APO servers
virsh start web-server
virsh start backup
virsh start repository
virsh start wiki
virsh start irsc

# finally web firewall, now online to the world
virsh start web-firewall