PT-2020-5968 · Linux +4 · Linux Kernel +4

Name of the Vulnerable Software and Affected Versions: Linux Kernel versions prior to 5.8-rc6 Description: The issue is related to the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot add file can create ZRAM device nodes in the /dev/...

Advanced transport modes (HotAdd and SAN) fail over to NBD mode

Challenge Advanced transport modes Virtual Appliance HotAdd or Direct Storage access may not work, failing over to the NBD transport mode instead. If you are seeing error "Cannot use advanced transport modes, failing over to NBD " you should check the HotAdd attacher agent log default location -...

Backup jobs using Virtual Appliance (HotAdd) transport mode take longer after installing 9.5 Update 3a

Challenge After installing Veeam Backup & Replication 9.5 Update 3a, the backup duration may be significantly increased for jobs using the Virtual Appliance HodAdd transport mode. Other transport modes NBD/NBDSSL, Direct SAN, Direct NFS are not affected. Cause This is a known issue affecting VMwa...

Appliance Mode (Hotadd) isn't available if proxy VM and its replica are running under the same vCenter

Challenge A VMware Backup Proxy is not processing VMs using Virtual Appliance HOTADD mode, despite meeting all requirements. Cause Veeam Backup & Replication uses VDDK to communicate with VMware infrastructure. Starting with VDDK 6.0, VMware added additional logic to validate possible transport...

A proxy VM may become inaccessible during hotadd backup

Challenge 'Hotadd' backup proxy virtual machine becomes inaccessible or powered off with the following possible symptoms: 1. Virtual machine randomly stops responding. 2. When guest operating system fails, there is no BSOD or kernel panic. 3. The vmx process of virtual machine fails or is killed ...

VDDK error: 13 - Troubleshooting

Challenge Backup/Replication jobs fail with: VDDK error: 13.You do not have access rights to this file Solution Below is a list of possible solutions to this issue sorted by what transport mode was being used when this error occurred. Note: There are many causes for VDDK 13; this list is not...

Removing Stuck VMDK From the Veeam Proxy

Challenge A virtual machine VM processed with Veeam Backup & Replication VBR has a warning that consolidation is required, but consolidation attempts fail. or A VM that VBR processed is found to have one or more orphaned snapshots a snapshot that is attached to the VM but does not show up in the...

VDDK Error 3 Troubleshooting

Challenge A Backup or Replication job fails with an error containing 'VDDK error: 3 ' This most often occurs when forcing aVMware Backup Proxy to use 'Virtual Appliance' transport mode and disabling the 'Failover to network mode' option. Cause The most common scenario is that the disks of the VM...

How to manually test hotadd functionality

Purpose This article documents the procedure for manually performing hotadd to test whether a Veeam Backup Proxy can attach a VM's base disks. Solution Requirements and Limitations Before testing, review Virtual Appliance HOTADD Requirements and Limitations Review KB1054:Appliance Mode Hotadd...

Failed to open VDDK disk error in Virtual Appliance mode, IDE virtual disks not supported

Processing the VM with IDE virtual disks in VA/hotadd mode fails...

Appliance Mode (Hotadd) Requirements and Troubleshooting

Requirements Virtual Appliance HOTADD Requirements and Limitations Requirements for Backup and Restore of Encrypted VMs Known Issues If the VM disk resides on a vVol, the Veeam VMware Backup Proxy's VM configuration file vmx must be on the same vVol. The Veeam VMware Backup Proxy VM must be locat...