RHEL 4 / Centos 4 on VMware ESX 2.1

Byetzion 09/07/2006

While trying to install RHEL 4 on VMware ESX 2.1 I’ve had the pleasure of seeing Linux installation which was unable to detect disks.

A quick search in VMware’s web site resulted in a download page for RHEL 4 Update 2, which, unfortunately, wasn’t the version I was using.

Before running around and searching the nearest download of RHEL 4 Update 2, I’ve noticed that VMware configuration for each virtual machine defines vxmbuslogic SCSI adapter which requires, as it appears, special driver for Linux RHEL 4. However, changing the adapter to vmxlsilogic solved the issue, and required no special Linux driver.

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IBM FastT200 serial console wiring diagram

Byetzion 03/10/2006

Well, not exactly a digram, but I will describe the IBM FastT200 RJ25 to DE9 wiring. This inforamtion was given to me by a friend, and I both hope it to be accurate, and hope it would help whoever needs it. RJ25 DE9 1 8 2 7 3 3 4 …

Disk Storage | Linux

Hot resize Multipath Disk – Linux

Byetzion 19/08/2011

This post is for the users of the great dm-multipath system in Linux, who encounter a major availability problem when attempting a resize of mpath devices (and their partitions), and find themselves scheduling a reboot. This documented is based on a document created by IBM called “Hot Resize Multipath Storage Volume on Linux with SVC”,…

bash | Linux | Scripting/Programming

Correction of a small but annoying error

Byetzion 19/04/200719/12/2023

For some reason (probably a typo) I’ve missed an important character in an example I gave here, but I have just recently fixed it. Anyhow, to clarify this, here is the extended description of the correction. The $IFS Bash system variable defines what is the default separator between strings. Changing it can help when dealing…

Linux

Multiple users with the same UID/GID

Byetzion 03/02/202003/02/2020

First, let me state that this is not a desirable action. It can be done, because, as root, there are so many things which are considered “bad practice” you can still do – this is part of what’s ‘root’ is all about – you know what your system needs, and you know how to do…

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Poor Man’s DRP + Snapshots – Linux only

Byetzion 06/10/2006

When you own a data storage, one of your major considerations is how to backup your data. Several solutions exist to answer this question. When your data grows to a certain size, you encounter an additional issues – How to backup the data with minimum performance impact. It is quite obvious that backup devices has…

Disk Storage | Linux

Installing one Linux from another

Byetzion 19/04/202319/04/2023

I have recently acquired a new computer without an operating system, and I wish to install Oracle Enterprise Linux version 9.1 on it. The ISO file required for the installation is located on an NFS file server, accessible through a network infrastructure. The hardware boots using uEFI, and I have a USB disk-on-key containing Ubuntu…

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