In the previous two posts on how to use the password protection feature of hard disks and SSDs and how to unlock them when temporarily connected to another computer via a USB adapter, I mentioned that the adapter has to support the UAS (USB Attached SCSI) protocol. Unfortunately, some (older) USB-3 to SATA adapters do not support the protocol which results in strange hdparm error messages. As I was doing this for the first time, I had the dilemma that I didn’t know if the strange error messages were a result of a mistake I made or if the adapter did not support the required protocol. After a bit of searching I came up with the following procedure to check for support:
How to Use A Password Locked Disk over USB
In a previous post I have looked at what hard disk password protection would do for me and what its limitations are. One issue is that it’s no longer straight forward to just use a password protected drive in a USB to SATA converter as a lower level ATA command is required to unlock the drive. On Linux, the drive can be unlocked with ‘hdparm‘ but there are a couple of pitfalls that took me quite some time to figure out.
Protecting Hard Disks and SSDs with a Password
One thing that still bugs me a bit about my Linux installation is that the system partition is not encrypted. In practice that should mostly be o.k. because I mapped ‘/tmp’ to memory and ‘/home’ is mounted to an encrypted partition during boot. But still, it bugs me a bit. And notebooks on the move do get stolen or are lost by accident. So when I recently thought a bit about the password protection offered by hard drives, I investigated a bit to see if this would help me out.
Continue reading Protecting Hard Disks and SSDs with a Password
Interesting 2D Bar Code Applications
Until only a few years ago, 2D bar codes didn’t really make it into the limelight. That has quite changed now and I use 2D bar codes on a daily basis. And some applications are actually quite unexpected.
Book Review: The Ultimate Entrepreneur – Ken Olson and DEC
For a long long time I wanted to find out a bit more about the history of Digital Equipment Corporation and its legendary co-founder Ken Olson. I’ve never worked on a DEC machine in my career, but many of their machines are famous, e.g. the PDP-1 and space war, the PDP-8 as the first ‘affordable’ mini-computer, the PDP-7 and 11 on which Unix was created, etc. etc. I did, however, use one of their services that they created in their final years. Anyone remember the Altavista search engine? And I remember their Alpha processor design and Windows NT running on it. There are a number of books on the history of DEC and here is a review of “The Ultimate Entrepreneur – The Story of Ken Olson and Digital Equipment Corporation” by Glenn Rifkin and George Harrar.
Continue reading Book Review: The Ultimate Entrepreneur – Ken Olson and DEC
Back To 500 Mbit/s Wifi At Home – Thank you Radar!
In a previous post I wrote about installing a Wi-Fi repeater in my home and how I could then reach a sustainable data rate of over 800 Mbit/s. Very close to Gbit Ethernet! Unfortunately the connection was not stable. After a few days the repeater just stops working until rebooted. After experiencing this a couple of times I had a closer look to find out if this was a software instability or something else.
Continue reading Back To 500 Mbit/s Wifi At Home – Thank you Radar!
Pushing the Limits – A 20 GB ZIP File on Nextcloud
It is interesting to see how the users of my Nextcloud keep pushing previously existing limits, real or perceived. Back in 2018 I had a post of how to increase the maximum file size Nextcloud could handle and I was happy to see that I could easily go up to 5 GB files. I didn’t push it beyond that as I couldn’t imagine anyone would want to send bigger files. But recently, I was asked if a 20 GB file could be stored on my Nextcloud for sharing and I have a to admit I was skeptical. So I set out to try if and how this would work in practice.
Continue reading Pushing the Limits – A 20 GB ZIP File on Nextcloud
Updating to Ubuntu 20.04 – The Bad Things
After writing about all the good things I noticed after upgrading from Ubuntu 16.04 to 20.04, it’s time now to also talk a bit about the things that I didn’t like after upgrading. So here we go…
Updating to Ubuntu 20.04 – The Good Things
Back in 2009, I installed a derivate of Ubuntu 09.04 on a notebook ‘just to try it out’ and have remained with Ubuntu ever since. It was my first Linux I used full time as it was clear to me that closed source software connected to the Internet would not work for me but eventually against me. Over the years, I’ve upgraded to the Long Term Support (LTS) versions 10.04 12.04, 14.04 and finally to 16.04 in 2016. I skipped 18.04, as 16.04 was ‘good enough’ and, as far as the operating system is concerned, I don’t have to live on the bleeding edge. But since Ubuntu 16.04 will reach the end of its support cycle in 2021 and some annoying quirks had never been fixed over the years, I decided to jump on the 20.04 Long Term Support (LTS) bandwagon as soon as possible. After using the new system for two weeks now, it was time to write down the things I like about 20.04 and compare it to 16.04. In a follow up post I will rant a bit about the things that I don’t like, which are unfortunately just about as many.
How To Speed Up Cellular Network Search
A practical tip today: When I am abroad (o.k. that doesn’t happen a lot right now…) I do tend to occasionally change the network I am roaming in for a number of reasons. Unfortunately that usually takes a long time as the device searches in lots of bands for 3 different network technologies. But this process can be sped up significantly!