Author: Admin
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vCLS not starting on Lenovo servers running ESXI
Recently I have installed a fresh vSphere 8 cluster for one of my customers. When we enabled DRS, the following problem appeared: vCLS VMs are deployed, however they are powered off causing Cluster balancing jobs to fail. “Cluster Service health” showing “Degraded” state due to Unavailability of vCLS and failed balancing jobs. Re-enabling DRS or…
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High-performance NAS on Windows Storage Spaces
Storage Spaces is a great technology natively presented in Windows. With Storage Spaces you can create volumes with different resiliency settings, including parity (N+1 and N+2). This configuration is very efficient when storing large amounts of data. Many users are experiencing slow performance when writing files larger than 1 GB on Parity volumes, caused by…
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Software defined NAS
In this article we will select a software for a self-built NAS. For inexperienced users I strongly suggest to buy a ready solution like Synology. They are easier to use and have a commercial support. For anyone interested how to build an affordable NAS from computer, let’s do it! Selection criteria Here is a list…
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Benchmarking high-capacity NAS drives
At some point I decided to build a NAS with a maximum capacity at minimum cost. After some research I found Seagate 16 TB HDDs that had the least price per TB. So I bought: All the purchased disks have exactly the same usable capacity of 16,000,900,661,248 Bytes, same SATA v3 interface and rotation speed…
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How to mount Windows share on Linux
Today I will show you how to mount SMB share on Debian 12 and make it persistent. First of all, cifs-utils should be installed: Next we need to create a mount point on Linux server. I will create “video” folder in root directory: SMB shares usually are not public and some credentials are required for…
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Receive SSH login notifications in Telegram
If you want to receive a notification about new ssh login to your Linux server, this article is for you. Introduction Implementing a simple notification script for SSH logins on a Linux server is a crucial step for enhancing security, monitoring, and accountability. Such a script provides real-time alerts whenever a user logs in, helping…
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Upgrade MariaDB 10.11 to 11.4 in 3 steps
At the beginning we have a Debian 12 server running MariaDB version 10.11, which can be verified with following command: Step 1 : Connect repository Correct repository settings can be obitained on the official website: https://mariadb.org/download/ Import repository signing key: From Drop-down lists select Debian 12 and MariaDB version 11.4. After selection, repository configuration will…
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Schrodinger’s WAN
The concept This topology may be unneeded and complicated in most of cases, however is it inspired by real life, so I will share it. Let’s say you are sitting in one point of universe and have a WAN connection to your local ISP. For the same time you have an another location with another…
