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Changing Contents in a File in Every Node

Occasionally you may want to change a a single string inside of a file that is on every compute node. If the file was the same on every node you could change it in one place and then copy it out like so: $ act_cp -g nodes /path/to/file Some config files are unique to each […]

Installing NVIDIA Drivers on RHEL or CentOS 7

Most users of NVIDIA graphics cards prefer to use the drivers provided by NVIDIA. These more fully support the capabilities of the card when compared to the nouveau driver that is included with the distribution. These are the steps to install the NVIDIA driver and disable the nouveau driver. Prepare your machine yum -y update yum […]

Checking and Clearing InfiniBand Errors

An easy way to check for errors on your entire cluster IB network is to run the command ‘ibcheckerrors.’ This will print any errors that can range from a port being down (even just unplugged temporarily) to transmission errors. After troubleshooting any errors you find, you can clear out the error counters with the command […]

How to enable IPMI SOL for ASUS machines running CentOS 6.x

A serial console will allow you to send all text based output to one of the on-board serial ports. While this can be done using a physical serial port and an external terminal server, it’s more likely that Serial Over Lan (SOL) is used. SOL is provided by the IPMI (Intelligent Platform Mangement Interface) device […]

Replacing an LSI raid card with a pre-configured raid array

Newer LSI raid cards (depending on their current firmware version it seems) will auto-import raid configurations from previous raid cards. However on older cards you have to import the disks ‘foreign’ configuration. In order to check if your raid array was automatically imported by your new raid card you can run the following command: $ MegaCli64 […]

Create a raid array with MegaCli64

Note: The following is assuming that you have attached new drives to a newly installed LSI raid controller. The first thing to do is to get a list of all the drives attached to the raid controller. The way the LSI raid controllers identify/label their attached disks is by an ‘Enclosure ID’ and the drive […]

How to expand an existing LSI raid array using MegaCli

Warning: You should ALWAYS make a backup of all of your information on the raid array before performing any of these steps. The exact commands to do this vary on your current configuration and number of disks in the raid. Before adding in the disks you need to get a feel for your current setup by […]

How to update the date/time on LSI Raid cards using MegaCli

Setting the date/time on your controller is advised to keep system logs in sync. Although this is normally done by the drivers after bootup, we can do this manually with the MegaCli tool using the following syntax: MegaCli64 -AdpSetTime yyyymmdd hh:mm:ss -a<adapter#> yyyy is year in 4 digit format: 2013 mm is month in 2 […]

Building WRF on ACT systems

WRF has many options that may be unique to any particular installation. This article is to help you get up and running with WRF as quickly as possible without having to rediscover the right settings. Below are the steps to build all dependencies for WRF 3.6 as of August 2014. Background Systems installed by ACT […]

What is Cli64?

Cli64 is a (poorly named) proprietary tool developed by Areca that provides reporting AND management functions from userspace. If installed from the ACT repo the binary is located at /usr/local/bin/cli64. The default password for the controller is 0000. [root@localhost ~]# cli64 ? Copyright (c) 2004-2011 Areca, Inc. All Rights Reserved. Areca CLI, Version: 1.86, Arclib: […]

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