George Georgovassilis writes about information technology architecture
I'm experimenting with protecting the perfect NAS RAID setup against bit rot (silent data corruption in long storage) and recently experimented with dm-integrity towards that end. The idea is to add checksums on the block level to each hard disk so that data corruption shows up as an I/O error to md, which would then … Continue reading md and dm-integrity performance issue
A particular USB harddrive won't show up in the device list under Ubuntu 18.04 when connected to a USB 3.0 port of the HP proliant microsever gen8 though it will show up when connected to a USB 2.0 port. The symptoms are that the drive won't list with fdisk -l nor how up under /dev/sdX. … Continue reading USB harddrive not showing on USB 3.0 port
Monitoring an audio source is a term audio folks use to say that they send the signal from an audio input source (eg. line in or microphone) to an auxiliary audio output (eg. headphones) so that they can listen to the input signal in real time. Windows 10 allows this out of the box, it's … Continue reading Monitoring input audio with Ubuntu
I'm playing around with using DSLR cameras as webcams with gphoto (CLI to cameras over USB) and v4l2loopback (dummy video devices), which works with OBS but neither Skype nor VLC which will either show a black image or fail with an error message. Running VLC in verbose mode and digging a bit around showed that … Continue reading Skype and VLC cannot use v4l2loopback video device
The Microsoft LifeCam is a versatile USB Webcam family which is supported well in Ubuntu Linux. Unfortunately it records HD videos only at low fps, but there is a workaround to get high resolution with 30 fps. Install guvcviewOpen guvcview, switch to the Video Controls tab and pick the LifeCamSelect 30/1 fps in the Frame … Continue reading Higher frame rate with Microsoft LifeCam and Linux
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