Oracle VM (domU) goes in loop with following warnings after reboot

PRCR-1070 :Failed to check if resource ora.asm is registered
CRS-0184 : Cannot communicate with the CRS daemon
Waiting for ASM to startup

Solution:
#service acfssihamount stop
#chkconfig acfssihamount off
#sudo chkconfig --list acfssihamount
acfssihamount 0:off 1:off 2:off 3:off 4:off 5:off 6:off

Steps:
As the server goes in the loop with message “Cannot communicate with the CRS daemon ; Waiting for ASM to startup” , the login prompt is not prompted.
So we cannot implement the solution directly.
1.       Download the diag.iso file from oracle support and copy the file to dom0

2.       Edit the vm.cfg file and add following under section “disk = “
Example:
disk = [
'file:/OVS/Repositories/123456/VirtualDisks/file1.img,xvda,w',
'file:/OVS/Repositories/123456/VirtualDisks/file2.img,xvdd,w',
'file:/OVS/Repositories/123456/VirtualDisks/file3.img,xvde,w',
'file:/opt/oracle.cellos/diag.iso,hdb:cdrom,r'
]
boot = 'd'

3.       Boot the vm which is having the problem from dom0
xm create /EXAVMIMAGES/GuestImages/xxxxx.dbaas.ing.net/vm.cfg

4.       Login to console of the vm started with following credentials
xm console xxxxx.dbaas.ing.net
localhost login: root
password: sos1exadata

5.       Check what is mounted
-sh-4.1# df -h
Filesystem                Size      Used Available Use% Mounted on
devtmpfs                 15.6G     96.0K     15.6G   0% /dev
tmpfs                    15.7G         0     15.7G   0% /dev/shm

6.       Check from other vm the file name where the root is mounted from On BE side it is as following on all vm’s
-sh-4.1# mount /dev/mapper/VGExaDb-LVDbSys1 /mnt/cell
[  718.804780] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)

-sh-4.1# cd /mnt/cell/etc/rc3.d/
-sh-4.1# ls -l S55acfssihamount
-sh-4.1# rm S55acfssihamount

7.       Shutdown the domU vm from the console
8.       Remove the extra entries added in Step 2 from respective file vm.cfg
9.       Start the domU/vm normally
# xm create /EXAVMIMAGES/GuestImages/ xxxxx.dbaas.ing./vm.cfg

References:
How to boot Exadata database server with diagnostic ISO image (Doc ID 1947114.1)

How to Configure an Oracle VM 3.x HVM Guest to Boot into Linux Rescue Mode Without Using OVM Manager (Doc ID 2266417.1)

Oracle Linux 6 server hangs on boot with error: Waiting for ASM to startup (Doc ID 2495023.1)


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