Resizing a Raw Virtual Machine LVM Partition Using fdisk

hdd_unmount

As the amount of data we store continues to grow and grow, there is bound to become a time that you will need to resize your partitions to add more disk space. On our of my MySQL replication virtual servers, I created it initially with a 200GB disk. After moving all the data over, was wishing I would have had a bit more space. Good news is this can easily be done. I should note that I am using raw image files, not lvms, so there is a bit more work required.

Could Not Access KVM Kernel Module: Permission Denied

virtual_machine2

I’m starting to work on replacing my CentOS 6 KVM server with a new CentOS 7 server. As much as I dislike CentOS 7, I’m trying to give it an honest try and make an honest attempt at learning. Working in the IT profession requires you to constantly adapt to change and learn new tech stacks. The problem I have is in CentOS 6 it was so easy to install KVM and set up a VM. CentOS 7 has been issue after issue. The most recent being the “Could Not Access KVM Kernel Module: Permission Denied” error.

Opus BT-C3100 / IMax Battery Charging & Testing Board

laptop_battery

This is going to be the first post in my solar battery project series. For several months now, I have been collecting laptop batteries and breaking them down to harvest the lithium ion 18650 cells inside. My goal is to use them to build a large battery bank to store solar power. This project has been going on for over a year now, but unfortunately, I haven’t been documenting it. Going forward, I’m going to try to document my progress along with pictures/details of my built.

Oracle PL/SQL HTTP File Upload With Post Request

http

More and more services these days are following a cloud-based hosting model. A cloud-hosted application is one where you pay a subscription fee and the vendor hosts the product for you. This way you don’t have to worry about buying/managing your own servers or paying IT staff to take care of them. This makes integrations more difficult in a sense. You can no longer simply connect in to the database. Instead, vendors usually provide you with API endpoints to use where you can send normal HTTP GET or POST requests.

Oracle Data Guard “Physical Standby Database (Disabled)”

kexi

This past week, I was working on a task nobody anywhere ever wants to do: routinely changing passwords. It’s easy enough to do. In Toad for Oracle, right-click the user, Alter, paste new password. That works well until you realize you forgot everywhere you used and need to update that password. In our case, I neglected to stop Data Guard prior to changing the passwords, which caused our production server to be marked as “disabled”.

R1Soft CDPServer Error “Failed backup of LVM configuration”

blue_external_drive_backup

Backing up your data is essential to anyone using a computer. It doesn’t matter if you’re an IT administrator managing hundreds of servers or a casual user typing up a essay for class. Some of us simply insert a USB stick and copy our files over from time to time. Others rely on more sophisticated solutions to run backups routinely without any manual work needed. One of these solutions is R1Soft, also referred to as CDPServer. But what do we do when these systems don’t work?