Hardware

RAID 10 is not the same as RAID 01.

This article explains the difference between the two with a simple diagram.

I’m going to keep this explanation very simple for you to understand the basic concepts well. In the following diagrams A, B, C, D, E and F represents blocks.
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As part of the on-going VMware article series, earlier we discussed about VMware virtualization fundamentals, and how to install VMware Server 2.

In this article, let us discuss about how to install VMware ESXi.

VMware ESXi is free. However, the software comes with a 60 days evaluation mode. You should register on VMware website to get your free license key to come out of the evaluation mode. Once the ESXi is installed, you can either user vSphere Client on the Direct Console User Interface to administer the host.
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DELL Server LSI Logic Create Hardware RAID
Disk space is never enough. On an on-going basis system administrators will be getting request to increase the disk space on a server.

In this article, let us review how to add new physical disks and create a virtual disk with a RAID configuration on an DELL PowerEdge Server using PERC 6/i Integrated BIOS Configuration Utility.

The new DELL Servers has the ability to create RAID 0, 1, 5, 6 and 10 using the hardware controller.

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RJ45 Ethernet Cable
Photo courtesy of Olivander

1. What is PoE – Power Over Ethernet?

Power over Ethernet (PoE) does exactly what it says — it carries power over ethernet cables. So, an ethernet cables caries both data and current together to operate devices like wi-fi access points. This is very helpful to install wi-fi access points in ceilings, where it is hard to find power outlets. Only smaller devices can be powered using the PoE, as it carries limited power over the ethernet.
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Hardware Specs
Photo courtesy of viagallery.com

This is a guest post written by SathiyaMoorthy.

lshw (Hardware Lister) command gives a comprehensive report about all hardware in your system. This displays detailed information about manufacturer, serial number of the system, motherboard, CPU, RAM, PCI cards, disks, network card etc.,

Using lshw, you can get information about the hardware without touching a screwdriver to open the server chassis. This is also very helpful when the server is located in a remote data center, where you don’t have physical access to the server.

In our previous article, we discussed about how to display hardware information on linux using dmidecode command. In this article, let us review how to view the hardware specifications using lshw command.
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[Servers in a Rack]Photo courtesy of Jamison Judd

This is a guest post written by SathiyaMoorthy.

Wakeonlan (wol) enables you to switch ON remote servers without physically accessing it. Wakeonlan sends magic packets to wake-on-LAN enabled ethernet adapters and motherboards to switch on remote computers.

By mistake, when you shutdown a system instead of rebooting, you can use Wakeonlan to power on the server remotely. Also, If you have a server that don’t need to be up and running 24×7, you can turn off and turn on the server remotely anytime you want.

This article gives a brief overview of Wake-On-LAN and instructions to set up Wakeonlan feature.
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[Dell Server] OMSA is a web based application to manage DELL PowerEdge Servers. Using OMSA you can perform proactive system monitoring, system diagnosis, troubleshoot hardware issues and configure RAID etc., You can also view and manage hardware’s embedded system management (ESM) log using OMSA.

This is an jumpstart guide that explains how to install Dell OMSA on Linux. I have also provided few screenshots of DELL OMSA web application.
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How To Get Hardware Information On Linux Using dmidecode Command

by Ramesh Natarajan on November 10, 2008

[Mother Board]Photo courtesy of B Naveen Kumar

dmidecode command reads the system DMI table to display hardware and BIOS information of the server. Apart from getting current configuration of the system, you can also get information about maximum supported configuration of the system using dmidecode. For example, dmidecode gives both the current RAM on the system and the maximum RAM supported by the system.

This article provides an overview of the dmidecode and few practical examples on how to use dmidecode command.
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