I write my articles when some technical issue really frustrates me and when there’s not much information available about it on the Internet. There’s an issue a hit recently in AWS CodeBuild – when you cd into a directory with…
Veeam backup failures after adding ESXi host to vCenter
Veeam have a KB article(https://www.veeam.com/kb1857) with ideas how to troubleshoot the following backup failure error: Unable to allocate processing resources. Error: No backup proxy is able to process this VM due to proxy processing mode restrictions. There could be scenarios…
Xpenology – Overcoming VMware Challenges with DSM 6.1.7 to 6.2.2 Upgrade
I usually write articles when something frustrates me – in this case the behavior of VMware ESX SATA Controller ordering, which led to a couple of failing Synology DSM 6.1.7 to 6.2.X( X>0) which require SATA, instead of SCSI Controller…
iSCSI Initiator problem -Initiator Instance Does Not Exist.
Recently changed IP subnet range in the local network and turned out one of the Windows servers was not able to connect its iSCSI disks from the Synology NAS. When trying to rediscover from the iSCSI Initiator there following error…
Failing HealthChecks on Regional Google Cloud TCP Load Balancer
Often Google are right, but sometimes not. Recently I was looking at why GCP TCP Load Balancer healthchecks were failing, despite I have configured strictly my local OS firewall to allow the documented health check IP ranges : (https://cloud.google.com/compute/docs/load-balancing/network/ –…
Xpenology on VMware – Disk Extend
Recently I run out of free space on one of my XPenology DSM 6 drives and had to run an extend. Since it’s running on ESXi, the VMware disk extend was easy. However surprisingly or not the Synology part wasn’t.…
Citrix XenServer hangs on detecting hardware during deployment on Hyper-V
Recently I had to deploy XenServer 6.X on my Hyper-V LAB on Windows Server 2012 R2 to evaluate a monitoring solution with 3rd party MS SCOM management pack. The deployment was expected to be straightforward based on experience I have…
Installing Magento CE 2.0 on Windows Server 2012 R2 IIS 8.5
Magento (https://magento.com/) is one of the top 3 Open Source ecommerce platforms. Designed to run on Linux & Apache it could be a challenge to get it running on Windows IIS right from the first time since officially Magento is…
Auto DoS feature on HP V1810 switches blocks legitimate network traffic
Luckily the default state of the Auto DoS feature on the HP V1810 switches is disabled. And you should always leave it like this. It’s one of the worse implemented features ever seen on a managed switch. The idea for…
Sluggish Hyper-V performance and Intel C-State Tech
A few weeks ago after an in-place upgrade from Windows 2012 to 2012 R2 Hyper-V started behaving poorly, especially during the VMs power on. All of them were spending abnormal duration on “Starting (10%)” phase – at least several seconds.…