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Mac OS How To Remove Purgeable on Hard Drive

April 20, 2017 by Jack Zimmermann 80 Comments

Can’t Remove Purgeable Disk Space

Note: If you have Mac OS High Sierra installed, you need this guide instead.

When trying to install Bootcamp on my MacBook Pro, I had to delete a lot of files to get enough space to be able to accommodate for a Bootcamp partition on the drive. But even after removing around 60 GB of storage, Mac OS Sierra could still not make a large enough partition for Windows. When checking with Disk Utility it showed that indeed I had enough space, but there was a part called Purgeable that was impossible to move. No tools from Apple are available to handle this, but here’s how I fixed it.

Screenshot of Disk Utility showing Purgeable part of volume

(not actually my disk, forgot to take a screenshot)

[Read more…]

Filed Under: Macintosh Tagged With: Apple, Mac OS X, Macintosh, MacOS Sierra, Problem

DietPi Makes Your Raspberry Pi a Lean Mean Linux Machine

April 13, 2017 by Jack Zimmermann Leave a Comment

DietPi LogoMake your Single Board Computer shine with DietPi

My wild guess is that most people get a small Linux computer, like the Raspberry Pi, BeagleBone, Banana Pi or Orange Pi for a specific task. Unfortunately, most distributions are chock-full of software, with everything installed per default. But if you want to set up a lean single board computer for a specific task, you’re out of luck. Thankfully there is a Linux distribution, DietPi, that aims to fix that problem.

 

[Read more…]

Filed Under: Linux, Raspberry Pi Tagged With: BananaPi, Linux, OrangePi, Raspberry Pi, Server

Raspberry Pi 3 Overclocking Heatsink Cheap

December 17, 2016 by Jack Zimmermann 19 Comments

Raspberry-Pi-3-DIY-heatsink

I needed a cheap heatsink for my Raspberry Pi 3 that I use as a music player/server. To maximize performance, I wanted to overclock the computer for faster searching and handling of all my music. I’ve managed to overclock my central Stratum-1 NTP server to 1350MHz without any problems, but the dinky little aluminium heatsink was way to anaemic, so I found a very cheap DIY solution to my question. With this heatsink, I can run the Raspberry Pi 3 at 1.5GHz all day at full tilt without any issues!

[Read more…]

Filed Under: Raspberry Pi Tagged With: Heatsink, Linux, Overclock, Raspberry Pi

Raspberry Pi 3 Overclocking Enclosure

July 31, 2016 by Jack Zimmermann 3 Comments

Image of Raspberry Pi 3 Overclocking Case Enclosure

Raspberry Pi 3 Overclocking Case Enclosure

The results are in:
I’ve been very busy with different projects, and one of them requires a custom enclosure. So I thought it would be an excellent excuse to learn Fusion 360. When the Raspberry Pi 3 came out, I did some overclocking experiments. But I settled with just passive cooling with some small aluminum heatsinks. But after seeing some tests done with a more massive copper heatsink combined with a cooling fan, I decided that I wanted to build a case with a silent fan with enough room for a large heatsink. I need it for my NTP server at ntp.jacken.se to get better performance.

[Read more…]

Filed Under: Raspberry Pi Tagged With: Electronics, Raspberry Pi

Raspberry Pi Stratum-1 NTP Server Statistics

April 12, 2016 by Jack Zimmermann Leave a Comment

MRTG main screen for a NTP serverAfter becoming a full-fledged time-nut (I’m compiling a new Linux kernel on my second NTP server as we speak), I have started to use the statistics that I usually install on a server just to keep a check on it. Sure, when installing something like MRTG, it’s great to see if something is clogging the system, but mostly, it’s unused. But when working with an NTP server a lot of factors start to make a difference. The temperature of the processor (the whole computer actually, mostly due to crystal drift), the load of the CPU’s, etc.

[Read more…]

Filed Under: Raspberry Pi Tagged With: GPS, GPSDO, NTP, PPS, Server

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Portrait of Jack Zimmermann I'm a Swedish computer old timer hacking away on computers since 1979. I'm a total Apple and Linux gear head. Right now, I'm really into electronics. [Read More]

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