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Category Archives: Computer Technical Notes

Commodore MPS-1200

07-Apr-18

I recently purchased a Commodore MPS-1200 dot matrix printer. I have wanted one since I was just getting starting on my Amiga 2000. However, they are rare and even more rare in decent condition. Really, I wanted the MPS-1250, but the MPS-1200 and MPS-1250 are practically the same printer. The major difference between the two […]

Quick and Dirty Block Storage for OpenShift

19-Apr-17

This post is now also on the Official Red Hat OpenShift blog! Do you have an OpenShift installation, maybe a test cluster, but no fancy storage solution to provide your Persistent Volumes? Most people would turn to NFS for this, but did you know that it’s almost as easy to set up a simple iSCSI […]

SCSI2SD (Part 2 of Resurrecting the VAXen)

01-Oct-15

Link to Part 1 Almost all my SCSI drives have died.  This is the way of things, I suppose.  Replacements are difficult and expensive to find, and will probably not last much longer anyhow. Looking for alternatives, I found SCSI2SD, that emulates a hard disk using MicroSD cards as the backing store.  Someone’s already got […]

Resurrecting the VAXen (Part 1)

01-Oct-15

Subtitle:  An exercise in frustration. Years ago, I bought several VAX workstations with the intention to use them to learn VMS.  For the last few years, I’ve been too busy to fool with them for any length time, but now I have some time to try again.  As with any old hardware, it’s can be […]

RAID 6 and LVM

25-Sep-15

Years ago, I built a big file server to hold all my important stuff. In modern terms, it doesn’t have that much storage: just shy of 4 TB. An external hard drive would be much cheaper, but having a RAID6 array gives me more peace of mind about my data. Up to 2 drives can […]

Serial Consoles in RHEL6

04-Apr-15

I’m starting to get my server room set up again, so I can start experimenting with VAXes and VMS and things of that nature. Several years ago, I build a terminal server. It’s a little Mini-ITX machines with a JetWay JNC92-230-LF motherboard with proprietary daughter board, the AD4COMC1, that adds four serial ports for a […]

RHEL/Centos 7.0 and CCISS driver

02-Apr-15

I bought several HP DL360 G4p from Server Monkey to use as test machines for OpenStack. Unfortunately, the HP SmartArray 6i SCSI RAID controller that is installed in these machines is not supported by the RHEL 7.0. The cciss driver required for the controller is still part of the main kernel, it’s just not shipped […]

Creating floppy images

19-Jul-14

Recently, I’ve needed to create DOS floppy images to use with VMWare. Floppy images end up being more convenient than trying to set up LANMAN or other networking in DOS. I used to use dd(1), but it’s come to my attention that the mkfs.vfat(8) now has a -C option, that does some of that hard […]

OpenVMS Firmware Variables

17-Feb-12

After waiting hours for OpenVMS to install on my DEC3000, I was presented with the following error message when I attempted to boot the fresh install: %APB-F-BADSYSROOT, System root [SYSA.] does not exist, check bootflags Very disheartening, however it’s a fairly easy fix.  My DEC 3000 was previously used for OSF/1 (i.e. UNIX), so a […]

RTL8168B in Ubuntu Server LTS 8.04

22-Feb-10

So, This has probably been hashed out several times on the Internet, but I figure one more time wont hurt. I decided to install Ubuntu Server 8.04 LTS on one of my Linux machines. After installation, the ethernet card refused to work. It was detected by the kernel, there was a light on the switch, […]