Microsoft – Null Byte

Veeam Agent: “Windows Agent Error: Failed to read data from the data reader String was not recognized.Veeam Agent: “

By Antti Hurme 06/01/2024 No Comments 2 Min Read

After upgrading my homelab Veeam v12 to Backup & Replication 12.1(12.1.0.2131), my Windows Agent backups started to fail with the newest Windows Agent backup version 6.1.0.349. The error received on all agents were “Windows Agent Error: Failed to read data from the data reader String was not recognized.”. Downgrading the agent to 6.0.1090 did solve the issue, but upgrading the agent would result in the same issue to present. Note…

Azure AAD Single-Sign Token Issues with VMware vCloud Director

Microsoft VMware

By Antti Hurme 09/09/2019 No Comments 2 Min Read

If you’re using Azure AAD as your federation SSO identity source, you might end up with the following error in your vcloud-container-debug.log pointing to an old token; Caused by: org.springframework.security.authentication.CredentialsExpiredException: Authentication statement is too old to be used with value 2019-08-12T08:12:11.298Z and Authentication request failed: org.springframework.security.authentication.AuthenticationServiceException: Error validating SAML message By default, Azure tokens have a fairly long lifetime, and VMware vCloud Director only accepts tokens with a maximum age…

Migrating Hyper-V Virtual machines between clusters and forests

Microsoft

By Antti Hurme 25/08/2019 2 Comments 6 Min Read

Word of Warning: Hyper-V and it’s components suck, this guide is sketchy at best as i’m writing it out of memory, and there’s probably something form the hours of debugging. If the guide is missing something crucial, please leave a comment so I can correct it. Verify and validate everything before running it in your production environment. By jumping through all these hoops, I was able to live migrate VM’s…

Powershell: Get all Hyper-V Checkpoints in a cluster (and remove them)

Microsoft

By Antti Hurme 09/11/2018 1 Comment 1 Min Read

Powershell is the way to go if you need to get all your checkpoints in a cluster. Get-VM -ComputerName (Get-ClusterNode -Cluster h-pool) | Get-VMSnapshot | Select VMName,Name,SnapshotType,CreationTime,ComputerName Get all VM’s that have a checkpoit You can filter the results by adding a where clause, for example to get all recovery snapshots left behind by Veeam or any other backup solution. Get-VM -ComputerName (Get-ClusterNode -Cluster h-pool) | Get-VMSnapshot | Where-Object {$_.SnapshotType…