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Proxmox backup failed at nfs and ceph environment.

Forum|Forum|6 months ago
April 16, 2025
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osakanataro
Byte
6 replies

I created commserv 11.36.49 environment

Proxmox VE 8.3.5 datastore are 3 types, zfs, NFS share, ceph

I tried backup , zfs success, but NFS and ceph are failed

document said follwoing… I don't know why it failed

The Commvault software supports protection of Proxmox VE VMs with the following storage types:

Directory

NFS

CIFS

Ceph/RBD

LVM-thin
https://documentation.commvault.com/2024e/essential/protecting_proxmox_ve_vms_with_commvault.html

NFS and ceph are output same error to /var/log/commvault/Log_Files/vsbkp.log , “ Failed to open device [/dev/nbd??]”

proxmox snapshot ware created, but commvault could not detected snapshot.

What could be the problem?

proxmox infromation

root@pve3:~# /opt/commvault/Base64/TestVMInfo -proxmox -server localhost -user root -password <password> -gethostinfo
Using NodeName=[] InstanceName=[Instance001]
TestVMInfo started...
BUILD-TIME=[02:16:28] BUILD-DATE=[Mar 15 2025]
Testing VMInfo Instance Type Proxmox
localhost 8.3.5


Host List:
Host=[pve3]     Version=[]
  VM: linux2-ceph                      GUID: 103_37f0d81e-3ed1-417a-9a10-3d8f556e3b37   Host: pve3
  VM: windows-zfs                      GUID: 101_321aa67a-2aa2-45f5-b6f2-a7f1a8e0d821   Host: pve3
  VM: wintest3-nfs                     GUID: 105_7a3e58d8-be9e-4e03-a040-bd1635aa3dfe   Host: pve3


Datastore List:
  Datastore Name: ontap                            Total Size:               65,536   Free Space:        2,924,216,320
  Datastore Name: cephpool                         Total Size:        3,025,732,826   Free Space:        4,075,159,552
  Datastore Name: local-zfs                        Total Size:        4,165,549,440   Free Space:        1,031,267,056
  Datastore Name: iscsivol                         Total Size:        4,290,772,992   Free Space:        4,290,772,992
  Datastore Name: iSCSI                            Total Size:                    0   Free Space:                    0


Network List:
  Network Name:[vmbr1]
  Network Name:[vmbr0]
Host=[pve2]     Version=[]
  VM: wintest4                         GUID: 106_912c2649-d3bd-4fcb-99d4-0e58d52fba85   Host: pve2


Datastore List:
  Datastore Name: iscsivol                         Total Size:        4,290,772,992   Free Space:        4,290,772,992
  Datastore Name: cephpool                         Total Size:        3,025,732,826   Free Space:        4,075,159,552
  Datastore Name: local-zfs                        Total Size:        3,871,536,496   Free Space:        3,765,379,120
  Datastore Name: ontap                            Total Size:               65,536   Free Space:        2,924,281,856
  Datastore Name: iSCSI                            Total Size:                    0   Free Space:                    0


Network List:
  Network Name:[vmbr0]
  Network Name:[vmbr1]
Host=[pve1]     Version=[]
  VM: linux1                           GUID: 100_ebbfefd1-8fb0-4661-97b3-e9365eabdfd3   Host: pve1
  VM: wintest2                         GUID: 104_8a4b0fa4-6406-4daa-926b-b1c118799d2c   Host: pve1
  VM: wintest1                         GUID: 102_9458ccf3-2723-4529-b0eb-0ff008f2d8af   Host: pve1


Datastore List:
  Datastore Name: cephpool                         Total Size:        3,025,732,826   Free Space:        4,075,159,552
  Datastore Name: iSCSI                            Total Size:                    0   Free Space:                    0
  Datastore Name: ontap                            Total Size:               65,536   Free Space:        2,924,281,856
  Datastore Name: local-zfs                        Total Size:        3,859,675,152   Free Space:        1,241,192,096
  Datastore Name: iscsivol                         Total Size:        4,290,772,992   Free Space:        4,290,772,992


Network List:
  Network Name:[vmbr0]
  Network Name:[vmbr1]

exited
root@pve3:~# /opt/commvault/Base64/TestVMInfo -proxmox -server localhost -user root -password <password> -getdsinfo
Using NodeName=[] InstanceName=[Instance001]
TestVMInfo started...
BUILD-TIME=[02:16:28] BUILD-DATE=[Mar 15 2025]
Testing VMInfo Instance Type Proxmox
localhost 8.3.5


Datastore List:
  Datastore Name: cephpool                         Total Size:        3,025,732,826   Free Space:        4,075,159,552
  Datastore Name: ontap                            Total Size:               65,536   Free Space:        2,924,216,320
  Datastore Name: local-zfs                        Total Size:        4,165,653,104   Free Space:        1,031,228,864
  Datastore Name: iscsivol                         Total Size:        4,290,772,992   Free Space:        4,290,772,992
  Datastore Name: iSCSI                            Total Size:                    0   Free Space:                    0
  Datastore Name: iscsivol                         Total Size:        4,290,772,992   Free Space:        4,290,772,992
  Datastore Name: cephpool                         Total Size:        3,025,732,826   Free Space:        4,075,159,552
  Datastore Name: ontap                            Total Size:               65,536   Free Space:        2,924,216,320
  Datastore Name: local-zfs                        Total Size:        3,871,492,848   Free Space:        3,765,335,472
  Datastore Name: iSCSI                            Total Size:                    0   Free Space:                    0
  Datastore Name: local-zfs                        Total Size:        3,859,653,328   Free Space:        1,241,170,272
  Datastore Name: iscsivol                         Total Size:        4,290,772,992   Free Space:        4,290,772,992
  Datastore Name: cephpool                         Total Size:        3,025,732,826   Free Space:        4,075,159,552
  Datastore Name: iSCSI                            Total Size:                    0   Free Space:                    0
  Datastore Name: ontap                            Total Size:               65,536   Free Space:        2,924,216,320

exited
root@pve3:~#

virtualmachine on NFS share information

root@pve3:~# /opt/commvault/Base64/TestVMInfo -proxmox -server localhost -user root -password <password> -fullmount  -vmname wintest3-nfs -readdisks
Using NodeName=[] InstanceName=[Instance001]
TestVMInfo started...
BUILD-TIME=[02:16:28] BUILD-DATE=[Mar 15 2025]
Testing VMInfo Instance Type Proxmox
localhost 8.3.5
Found VM wintest3-nfs with Guid 105_7a3e58d8-be9e-4e03-a040-bd1635aa3dfe on host pve3
-- Testing Full Mount --
VMName: wintest3-nfs  VMGuid: 105_7a3e58d8-be9e-4e03-a040-bd1635aa3dfe
MountPath: /opt/commvault/Base/Temp/VMMount  JobResults: /opt/commvault/Base/Temp/VMJobResults
Mounting [wintest3-nfs].....
MountVM failed for [wintest3-nfs]!!
MountVM Failed - [23] Error opening the virtual machine disks.

exited

/var/log/commvault/Log_Files/TestVMInfo.log

root@pve3:~# tail -f /var/log/commvault/Log_Files/TestVMInfo.log
572611 8bcc3 04/16 11:22:15 ### skipFS::SetFSCacheEnabled(542) - FSType cache is enabled
572611 8bcc3 04/16 11:22:15 ### EvEvent::SetupConnectionWithCVD() - Loading library under Base32
572611 8bcc3 04/16 11:22:15 ### EvEvent::SetupConnectionWithCVD() - Loading library under Base64
572611 8bcc3 04/16 11:22:15 ### main() - ================ Test VM Info Started =============================
572611 8bcc3 04/16 11:22:15 ### main() -  Test VM Info BUILD-TIME=[02:16:28] BUILD-DATE=[Mar 15 2025]
572611 8bcc3 04/16 11:22:16 ### CProxmoxInfo::Connect() - Connecting to Url=[localhost] User=[root]
572611 8bcc3 04/16 11:22:16 ### ProxmoxSDKWrapper::CProxmoxWrapper::Connect() - Connected to [localhost] Version [8.3.5]
572611 8bcc3 04/16 11:22:16 ### CProxmoxStorageCfg::LoadStorageInfo() - Invalid storage info
572611 8bcc3 04/16 11:22:16 ### CProxmoxInfo::_MountVM() - Mounting VM:[wintest3-nfs] with GUID:[105_7a3e58d8-be9e-4e03-a040-bd1635aa3dfe]
572611 8bcc3 04/16 11:22:16 ### ProxmoxSDKWrapper::CProxmoxWrapper::FindAndFillVMInfoFromCache() - Found [3] VMs on node [pve3]
572611 8bcc3 04/16 11:22:16 ### CProxmoxInfo::_MountVM() - Creating Snapshot [GX_BACKUP_0] of VM [wintest3-nfs]
572611 8bcc3 04/16 11:22:16 ### ProxmoxSDKWrapper::CProxmoxWrapper::FindAndFillVMInfoFromCache() - Found [3] VMs on node [pve3]
572611 8bcc3 04/16 11:22:19 ### CProxmoxInfo::SaveVMConfigFile() - Wrote vm config file successfully to [/opt/commvault/Base/Temp/VMMount/vmConfig.json]
572611 8bcc3 04/16 11:22:19 ### CProxmoxInfo::MountVM_Disks() - Connecting to VM [wintest3-nfs] snapshot [GX_BACKUP_0] for disk access
572611 8bcc3 04/16 11:22:19 ### CProxmoxInfo::MountVM_Disks() - Opening disk [ontap:105/vm-105-disk-0.qcow2]
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd1] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd1, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd2] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd2, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd3] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd3, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd4] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd4, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd5] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd5, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd6] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd6, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd7] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd7, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd8] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd8, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd9] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd9, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd10] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd10, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd11] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd11, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd12] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd12, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd13] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd13, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd14] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd14, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd15] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd15, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd16] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd16, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd17] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd17, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd18] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd18, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd19] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd19, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd20] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd20, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd21] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd21, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd22] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd22, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd23] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd23, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd24] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd24, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd25] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd25, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd26] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd26, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd27] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd27, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd28] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd28, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd29] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd29, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd30] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd30, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd31] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd31, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd32] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd32, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd33] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd33, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd34] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd34, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd35] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd35, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd36] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd36, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd37] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd37, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd38] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd38, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd39] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd39, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd40] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd40, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd41] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd41, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd42] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd42, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd43] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd43, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd44] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd44, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd45] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd45, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd46] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd46, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd47] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd47, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd48] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd48, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd49] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd49, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd50] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd50, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd51] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd51, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd52] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd52, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd53] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd53, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd54] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd54, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd55] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd55, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd56] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd56, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd57] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd57, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd58] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd58, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd59] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd59, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd60] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd60, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd61] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd61, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd62] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd62, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd63] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd63, OperationFlag=0x0, PermissionMode=0x0}
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::BuildMountCommand() - Failed to get NBD device
572611 8bcc3 04/16 11:22:19 ### CProxmoxDiskInfo::_OpenDisk() - Failed to build mount command for disk [105/vm-105-disk-0.qcow2] storage [ontap]
572611 8bcc3 04/16 11:22:19 ### CProxmoxInfo::MountVM_Disks() - Failed to open disk [ontap:105/vm-105-disk-0.qcow2]
572611 8bcc3 04/16 11:22:19 ### CProxmoxInfo::MountVM_Disks() - Unable to open any disks on VM [wintest3-nfs]
572611 8bcc3 04/16 11:22:19 ### CProxmoxInfo::UnmountVM() - Deleting Snapshot [GX_BACKUP_0] of VM [wintest3-nfs]
572611 8bcc3 04/16 11:22:20 ### HandleVMInfoError() - MountVM Failed - [23] Error opening the virtual machine disks.
572611 8bcc3 04/16 11:22:20 ### DumpConnectionMap - handle count = 0, map count = 0

Best answer by Bert1961

I have a working configuration.

Proxmox VE v8.4.1 3 node cluster
Netapp NFS datasres (Ontap 9.15.p7)
CommVault v11.36.53

After the installation of the vsa (virtual Server Agent) on the proxmox hosts,
The backup gave me the error “can’t connect to te VM disk file” in the log files the error “Failed to open device [/dev/nbdXX] “

In the log file i saw that qemu-nbd tries to mount a snapshot from the vm’s to backup and fails.

Using the command “ modprobe nbd” on all hosts creates de devices needed in /dev/nbdxx
And the backup and restore works.
Add the line nbd on /etc/modules to make the module load by every boot.

+20

Onno van den Berg
Commvault Certified Expert
1324 replies
Forum|Forum|6 months ago
April 16, 2025

Sounds like a possible permission issue. Given the fact that NFS support was added in MR49 and that Proxmox is still very new from a Commvault perspective so I would definitely open a support ticket. You could try to enroll MR52 that was released earlier this week, but the release notes do not mention anything for Proxmox, but that doesn't say it might contain a fix.

osakanataro
Author
Byte
6 replies
Forum|Forum|6 months ago
April 17, 2025

In this time, I was evaluting proxmox backup, not have license

I want to try next update MR52.

Bert1961
Bit
3 replies
Forum|Forum|6 months ago
April 25, 2025

Same error here, with 11.36.49 and Proxmox VE 8.4.0 in combination with NetApp NFS Datastores.

+20

Onno van den Berg
Commvault Certified Expert
1324 replies
Forum|Forum|6 months ago
April 26, 2025

Can you reinstall the Commvault agents on the access node with 11.36.41 and try to see if it works again? @osakanataro can you share an update if MR52 addressed your issue and if you opened a support ticket for it?

osakanataro
Author
Byte
6 replies
Forum|Forum|6 months ago
May 1, 2025

I tried to upgrade from 11.36.49 to 11.36.52… failed same error

uninstall 11.36.52 and re-install 11.36.52, but failed.

Bert1961
Bit
3 replies
Forum|Forum|6 months ago
May 1, 2025

We have a 3 node proxmox cluster for our POC and NetApp NFS datastores.
With v11.36.52 all backups failed.
We install 11.36.53 and we could make full/incremental backups.from VM’s on server POC01.
From VM’s located on servers POC02 and POC03 all the backups fails.
Migrate these VM’s to POC01 and the backups are succesfull.

When the backup fails we see in de job log file that the agent tries to connect to a nbd device.
/dev/nbd0 to /dev/nbd63
As far as I now:
Network block devices (NBD) are used to access remote storage device that does not physically reside in the local machine.

In the directory /dev/ there are not any nbd devices defined, and we are using NFS datastores, it seems the agent is trying to access te vM’s using the wrong storage type.

1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxInfo::MountVM_Disks() - Connecting to VM [windowstest2022test2] snapshot [GX_BACKUP_1952760] for disk access
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxInfo::MountVM_Disks() - Opening disk [POC_SSD_F59_DS003:102/vm-102-disk-0.qcow2]
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd1] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd1, OperationFlag=0x0, PermissionMode=0x0}
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxDiskInfo::GetDeviceSize() - Failed to open device

1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxDiskInfo::GetDeviceSize() - Failed to open device [/dev/nbd63] - 0xECCC0002:{CQiFile::Open(95)} + {CQiUTFOSAPI::open(87)/ErrNo.2.(No such file or directory)-Open failed, File=/dev/nbd63, OperationFlag=0x0, PermissionMode=0x0}
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxDiskInfo::BuildMountCommand() - Failed to get NBD device
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxDiskInfo::_OpenDisk() - Failed to build mount command for disk [102/vm-102-disk-0.qcow2] storage [POC_SSD_F59_DS003]
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxInfo::MountVM_Disks() - Failed to open disk [POC_SSD_F59_DS003:102/vm-102-disk-0.qcow2]
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxInfo::MountVM_Disks() - Unable to open any disks on VM [windowstest2022test2]
1974431 1e20b4 05/01 12:43:07 1952760 CProxmoxInfo::UnmountVM() - Deleting Snapshot [GX_BACKUP_1952760] of VM [windowstest2022test2]

Bert1961
Bit
3 replies
Answer
Forum|Forum|6 months ago
May 6, 2025

osakanataro
Author
Byte
6 replies
Forum|Forum|6 months ago
May 7, 2025

@Bert1961 thanks information.

I tried execute “modprobe nbd”, then successfull!


root@pve3:~# lsmod|grep nbd
root@pve3:~# modprobe nbd
root@pve3:~# lsmod|grep nbd
nbd                    65536  0
root@pve3:~# /opt/commvault/Base64/TestVMInfo -proxmox -server pve3 -user root -password password -readdisks -vmname linux2-ceph
Using NodeName=[] InstanceName=[Instance001]
TestVMInfo started...
BUILD-TIME=[02:16:28] BUILD-DATE=[Mar 15 2025]
Testing VMInfo Instance Type Proxmox
pve3 8.4.1
Found VM linux2-ceph with Guid 103_37f0d81e-3ed1-417a-9a10-3d8f556e3b37 on host pve3
-- Testing Full Mount --
VMName: linux2-ceph  VMGuid: 103_37f0d81e-3ed1-417a-9a10-3d8f556e3b37
MountPath: /opt/commvault/Base/Temp/VMMount  JobResults: /opt/commvault/Base/Temp/VMJobResults
Mounting [linux2-ceph].....
Mount done for [linux2-ceph].
---
Name: linux2-ceph   Uuid: 103_37f0d81e-3ed1-417a-9a10-3d8f556e3b37
Host: pve3   Version:
Tools:                                            GuestOS: Linux 2.6 - 6.X Kernel
Cleanup String: GX_BACKUP_0
---
File: linux2-ceph.json                                  540.00  B
Disk: cephpool:vm-103-disk-0                             40.00 GB              40.00 GB
        1 disks   Used Size: 40.00 GB   Provisioned Size: 40.00 GB
---
Opening disk vm-103-disk-0
Reading disk vm-103-disk-0
Read 42,950,721,536 bytes in 01:48  40961 samples from vm-103-disk-0
  376.60 MB/Sec
  1323.99 GB/hr
Closing disk vm-103-disk-0

VM [linux2-ceph] Total Read 42,950,721,536 bytes in 01:48
  376.55 MB/Sec
  1323.80 GB/hr

Unmounting linux2-ceph
Unmount done for linux2-ceph

exited
root@pve3:~#

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