Vdisks disappear in oracle vm for sparc 3.1

hi ,
i implement oracle rac on oracle vm for sparc 3 , and we have 2 guest domain running Solaris 11.1 , each guest domain in a separate SPARC T4-2 Server.
the ASM disks are 32 disks mapped to the two server and then mapped to the guest domains.
the problem here : when i added the disks in beginning it appeared 32 disks on each guest but after i restart the server and guest domain , sometimes the disks appears as 30 or 26 or 31 and sometimes 32. in other hand the disks appear 32 to control domain
and here my configuration of control domain :
root@control-domain # ldm list-services
VCC
NAME LDOM PORT-RANGE
primary-vcc0 primary 5000-5100
VSW
NAME LDOM MAC NET-DEV ID DEVICE LINKPROP DEFAULT-VLAN-ID PVID VID MTU MODE INTER-VNET-LINK
primary-vsw0 primary 00:14:4f:fb:11:72 net0 0 switch@0 phys-state 1 1 1500 on
primary-vsw1 primary 00:14:4f:f8:7b:ef net1 1 switch@1 phys-state 1 1 1500 on
primary-vsw2 primary 00:14:4f:fa:d1:09 net2 2 switch@2 1 1 1500 on
primary-vsw3 primary 00:14:4f:fa:2a:ed net3 3 switch@3 1 1 1500 on
VDS
NAME LDOM VOLUME OPTIONS MPGROUP DEVICE
primary-vds0 primary vol1 /dev/rdsk/c0t000B080008004265d0s0
primary_data_files1 primary data1_vol1 /dev/rdsk/c0t000B08000E004265d0s3
data1_vol2 /dev/rdsk/c0t000B08000F004265d0s3
data1_vol3 /dev/rdsk/c0t000B08001A004265d0s3
data1_vol4 /dev/rdsk/c0t000B08001B004265d0s3
data1_vol5 /dev/rdsk/c0t000B08001C004265d0s3
primary_data_files2 primary data2_vol1 /dev/rdsk/c0t000B08001D004265d0s3
data2_vol2 /dev/rdsk/c0t000B08001F004265d0s3
data2_vol3 /dev/rdsk/c0t000B080014004265d0s3
data2_vol4 /dev/rdsk/c0t000B080015004265d0s3
data2_vol5 /dev/rdsk/c0t000B080016004265d0s3
primary_data_files3 primary data3_vol1 /dev/rdsk/c0t000B080017004265d0s3
data3_vol2 /dev/rdsk/c0t000B080018004265d0s3
data3_vol3 /dev/rdsk/c0t000B080020004265d0s3
data3_vol4 /dev/rdsk/c0t000B080021004265d0s3
data3_vol5 /dev/rdsk/c0t000B080019004265d0s3
primary_data_files4 primary data4_vol1 /dev/rdsk/c0t000B080010004265d0s3
data4_vol2 /dev/rdsk/c0t000B080011004265d0s3
data4_vol3 /dev/rdsk/c0t000B080012004265d0s3
data4_vol4 /dev/rdsk/c0t000B080013004265d0s3
data4_vol5 /dev/rdsk/c0t000B080022004265d0s3
primary_online_logs primary online_logs_vol1 /dev/rdsk/c0t000B080024004265d0s3
online_logs_vol2 /dev/rdsk/c0t000B080025004265d0s3
primary_arch_logs primary archive_logs_vol1 /dev/rdsk/c0t000B080026004265d0s3
archive_logs_vol2 /dev/rdsk/c0t000B080027004265d0s3
archive_logs_vol3 /dev/rdsk/c0t000B080028004265d0s3
archive_logs_vol4 /dev/rdsk/c0t000B080029004265d0s3
archive_logs_vol5 /dev/rdsk/c0t000B080005004265d0s3
archive_logs_vol6 /dev/rdsk/c0t000B080006004265d0s3
primary_voting primary voting_vol1 /dev/rdsk/c0t000B080002004265d0s3
voting_vol2 /dev/rdsk/c0t000B080003004265d0s3
voting_vol3 /dev/rdsk/c0t000B080004004265d0s3
primary_archive primary arch_vol1 /dev/rdsk/c0t000B08002A004265d0s3
root@control-domain # ldm list-constraints
DOMAIN
primary
UUID
58925ecf-b822-6d35-d850-c713499ab385
MAC
00:10:e0:0e:b9:38
HOSTID
0x860eb938
CONTROL
failure-policy=ignore
extended-mapin-space=off
cpu-arch=native
rc-add-policy=
shutdown-group=0
VCPU
COUNT: 16
MEMORY
SIZE: 8G
CONSTRAINT
threading=max-throughput
VARIABLES
boot-device=/pci@400/pci@2/pci@0/pci@e/scsi@0/disk@w5000cca03c436301,0:a disk net
pm_boot_policy=disabled=1;ttfc=0;ttmr=0;
IO
DEVICE OPTIONS
pci_0
niu_0
pci_1
niu_1
VCC
NAME PORT-RANGE
primary-vcc0 5000-5100
VSW
NAME MAC NET-DEV ID DEVICE LINKPROP DEFAULT-VLAN-ID PVID VID MTU MODE INTER-VNET-LINK
primary-vsw0 net0 0 switch@0 phys-state 1 1 on
primary-vsw1 net1 1 switch@1 phys-state 1 1 on
primary-vsw2 net2 2 switch@2 1 1 on
primary-vsw3 net3 3 switch@3 1 1 on
VDS
NAME VOLUME OPTIONS MPGROUP DEVICE
primary-vds0 vol1 /dev/rdsk/c0t000B080008004265d0s0
primary_data_files1 data1_vol1 /dev/rdsk/c0t000B08000E004265d0s3
data1_vol2 /dev/rdsk/c0t000B08000F004265d0s3
data1_vol3 /dev/rdsk/c0t000B08001A004265d0s3
data1_vol4 /dev/rdsk/c0t000B08001B004265d0s3
data1_vol5 /dev/rdsk/c0t000B08001C004265d0s3
primary_data_files2 data2_vol1 /dev/rdsk/c0t000B08001D004265d0s3
data2_vol2 /dev/rdsk/c0t000B08001F004265d0s3
data2_vol3 /dev/rdsk/c0t000B080014004265d0s3
data2_vol4 /dev/rdsk/c0t000B080015004265d0s3
data2_vol5 /dev/rdsk/c0t000B080016004265d0s3
primary_data_files3 data3_vol1 /dev/rdsk/c0t000B080017004265d0s3
data3_vol2 /dev/rdsk/c0t000B080018004265d0s3
data3_vol3 /dev/rdsk/c0t000B080020004265d0s3
data3_vol4 /dev/rdsk/c0t000B080021004265d0s3
data3_vol5 /dev/rdsk/c0t000B080019004265d0s3
primary_data_files4 data4_vol1 /dev/rdsk/c0t000B080010004265d0s3
data4_vol2 /dev/rdsk/c0t000B080011004265d0s3
data4_vol3 /dev/rdsk/c0t000B080012004265d0s3
data4_vol4 /dev/rdsk/c0t000B080013004265d0s3
data4_vol5 /dev/rdsk/c0t000B080022004265d0s3
primary_online_logs online_logs_vol1 /dev/rdsk/c0t000B080024004265d0s3
online_logs_vol2 /dev/rdsk/c0t000B080025004265d0s3
primary_arch_logs archive_logs_vol1 /dev/rdsk/c0t000B080026004265d0s3
archive_logs_vol2 /dev/rdsk/c0t000B080027004265d0s3
archive_logs_vol3 /dev/rdsk/c0t000B080028004265d0s3
archive_logs_vol4 /dev/rdsk/c0t000B080029004265d0s3
archive_logs_vol5 /dev/rdsk/c0t000B080005004265d0s3
archive_logs_vol6 /dev/rdsk/c0t000B080006004265d0s3
primary_voting voting_vol1 /dev/rdsk/c0t000B080002004265d0s3
voting_vol2 /dev/rdsk/c0t000B080003004265d0s3
voting_vol3 /dev/rdsk/c0t000B080004004265d0s3
primary_archive arch_vol1 /dev/rdsk/c0t000B08002A004265d0s3
DOMAIN
dom1-node0
UUID
f6369ae2-152a-c65e-ecf9-c1840c895dac
HOSTID
CONTROL
failure-policy=ignore
extended-mapin-space=off
cpu-arch=native
rc-add-policy=
shutdown-group=15
VCPU
COUNT: 32
MEMORY
SIZE: 48G
CONSTRAINT
threading=max-throughput
VARIABLES
pm_boot_policy=disabled=1;ttfc=0;ttmr=0;
NETWORK
NAME SERVICE ID DEVICE MAC MODE PVID VID MTU LINKPROP
vnet0 primary-vsw0 0 network@0 1 phys-state
vnet1 primary-vsw1 1 network@1 1 phys-state
vnet2 primary-vsw2 2 network@2 1
vnet3 primary-vsw2 3 network@3 1
DISK
NAME VOLUME TOUT ID
vdisk vol1@primary-vds0 0
data1_disk1 data1_vol1@primary_data_files1 1
data1_disk2 data1_vol2@primary_data_files1 2
data1_disk3 data1_vol3@primary_data_files1 3
data1_disk4 data1_vol4@primary_data_files1 4
data1_disk5 data1_vol5@primary_data_files1 5
data2_disk1 data2_vol1@primary_data_files2 6
data2_disk2 data2_vol2@primary_data_files2 7
data2_disk3 data2_vol3@primary_data_files2 8
data2_disk4 data2_vol4@primary_data_files2 9
data2_disk5 data2_vol5@primary_data_files2 10
data3_disk1 data3_vol1@primary_data_files3 11
data3_disk2 data3_vol2@primary_data_files3 12
data3_disk3 data3_vol3@primary_data_files3 13
data3_disk4 data3_vol4@primary_data_files3 14
data3_disk5 data3_vol5@primary_data_files3 15
data4_disk1 data4_vol1@primary_data_files4 16
data4_disk2 data4_vol2@primary_data_files4 17
data4_disk3 data4_vol3@primary_data_files4 18
data4_disk4 data4_vol4@primary_data_files4 19
data4_disk5 data4_vol5@primary_data_files4 20
online_logs_disk1 online_logs_vol1@primary_online_logs 21
online_logs_disk2 online_logs_vol2@primary_online_logs 22
archive_logs_disk1 archive_logs_vol1@primary_arch_logs 23
archive_logs_disk2 archive_logs_vol2@primary_arch_logs 24
archive_logs_disk3 archive_logs_vol3@primary_arch_logs 25
archive_logs_disk4 archive_logs_vol4@primary_arch_logs 26
archive_logs_disk5 archive_logs_vol5@primary_arch_logs 27
archive_logs_disk6 archive_logs_vol6@primary_arch_logs 28
voting_disk1 voting_vol1@primary_voting 29
voting_disk2 voting_vol2@primary_voting 30
voting_disk3 voting_vol3@primary_voting 31
arch_disk1 arch_vol1@primary_archive 32
VCONS
NAME SERVICE PORT LOGGING
after login to guest domain :
format
0. c2d0 <SUN-DiskSlice-449GB cyl 65534 alt 2 hd 64 sec 225>
/virtual-devices@100/channel-devices@200/disk@0
1. c2d1 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1
2. c2d2 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@2
3. c2d3 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@3
4. c2d4 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@4
5. c2d5 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@5
6. c2d6 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@6
7. c2d7 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@7
8. c2d9 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@9
9. c2d10 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@a
10. c2d11 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@b
11. c2d12 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@c
12. c2d13 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@d
13. c2d14 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@e
14. c2d15 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@f
15. c2d16 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@10
16. c2d18 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@12
17. c2d19 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@13
18. c2d20 <SUN-DiskSlice-100GB cyl 25738 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@14
19. c2d21 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@15
20. c2d22 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@16
21. c2d23 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@17
22. c2d24 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@18
23. c2d25 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@19
24. c2d26 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1a
25. c2d27 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1b
26. c2d28 <SUN-DiskSlice-50GB cyl 12998 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1c
27. c2d29 <SUN-DiskSlice-10GB cyl 2623 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1d
28. c2d30 <SUN-DiskSlice-10GB cyl 2623 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1e
29. c2d31 <SUN-DiskSlice-10GB cyl 2623 alt 2 hd 64 sec 128>
/virtual-devices@100/channel-devices@200/disk@1f
30. c2d32 <Unknown-Unknown-0001-1.00TB>
/virtual-devices@100/channel-devices@200/disk@20
the missing disks c2d8 and c2d17 and so on it change frequently
and also the following messsge appears on both nodes
vdc: NOTICE: [4] Error initialising ports
vdc: NOTICE: [12] Error initialising ports
kindly help me to troubleshooting this problem .
thanks in advance

We had a similar issue in the past, per support we added the following entries to /etc/system on each LDOM and the issue has subsided for us:
* Forceload module to prevent virtual disks from disappearing
* during reboot, bug 15813779
forceload: drv/vdc
I hope this helps...

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