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Notes to myself for future reference that I have made public for the benefit of others.

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Converting ZFS pools from sdX to wwn

November 30, 2024November 30, 2024 Rory

Some of my ZFS pools referred to sda, sdb, sdc, sdd, sde etc which can change at boot especially if SATA ports are swapped. I’ve struggled to find a definitive answer for whether ZFS is storing more permanent GUIDs or… Read More

UncategorizedUbuntu, zfs

Setting up NUT for HP T700h UPS on Raspberry Pi

March 18, 2023March 18, 2023 Rory

HP T700h UPS has a serial port. I’m using a USB to RS232 cable/dongle that comes up as /dev/ttyUSB0. First install nut. Next, enable standalone mode in /etc/nut/nut.conf Define the UPS. I’ve called it “hp” but you can give any… Read More

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Choppy Airplay with Cambium cnPilot E400 Wifi

September 15, 2019September 15, 2019 Rory

TLDR: Disable OCS Problem symptoms Yesterday I experienced very choppy Airplay performance from my MacBook Pro. The video would periodically freeze and the audio drop out. Every few seconds there would be a noticeable gap in the audio and the… Read More

UncategorizedAirplay, Cambium, cnPilot, performance, Wifi

Upgrading M.2 SSD with only one slot

May 20, 2017February 17, 2019 Rory

I upgraded a laptop’s M.2 SSD to a larger one, but the (Gigabyte) laptop only had one slot. In Windows 10, hold SHIFT when clicking shutdown to perform full shutdown rather than fast shutdown. Use a live USB of CloneZilla… Read More

Uncategorized

Zone minder problem: no image in monitor

April 25, 2016February 17, 2019 Rory

Solution:https://forums.zoneminder.com/viewtopic.php?t=24265 Two tweaks must be applied. Part 1 In the web interface, go to options -> paths, and update PATH_ZMS from “/cgi-bin/nph-zms” to “/zoneminder/cgi-bin/nph-zms” Now, I get the following errors in the apache error log: ==> error.log <==[Tue Feb 09… Read More

Uncategorized

Mysterious HTTP redirect 302

March 29, 2015 Rory

A mysterious problem surfaced where an Android app making POST requests to an XML api would receive HTTP 302 redirect responses instead of valid 200 responses. Using a web browser with a mobile user agent (admittedly I didn’t try the… Read More

Uncategorized

Flickering Dell U2412M LCD on certain grays

August 12, 2012February 17, 2019 Rory

I’ve had an annoyance with my otherwise fantastic* Dell U2412M LCD where certain greys appear flickery. It happens on both the display port and the DVI input with a dongle from my Macbook Pro. Today I discovered that there is… Read More

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