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Cake day: November 14th, 2023

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  • Blue_Morpho@lemmy.worldtoSelfhosted@lemmy.worldHelp me harden my home server
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    14 hours ago

    You might want to consider that backups only protect very old data from ransomware.

    Ransomware works by getting on a machine and sitting for several months before activating. During that time, your data is encrypted but you don’t know because when you open a file, your computer decrypts it and shows you what you expect to see. So your backups are working but are saving files that will be lost once the ransom ware activates.

    The only solution is to frequently manually verify the backup from a known safe computer. Years ago I looked for something to automate this but didn’t find it. (Something like a raspberry pi with no Internet that can only see the PC it’s testing, compares a known file, then touches the file so it gets backed up again.)



  • Used servers/workstations are likely more reliable than new consumer.

    They were very likely kept temperature controlled, have ECC, and are actually known working instead of something like Asus. If I remember correctly, PC mortality is very high the first 6 months, goes down to near zero for 5 years, then starts going back up.

    Replace the SSD/hard drive and you are good. You might not even have to do that. I checked the stats on the SSD that came with my used Lenovo workstation and it had like 20 hours on it.
















  • You might want to go down the rabbit hole of virtualdub2 and avisynth. Virtualdub provides a GUI for very simple editing but its main focus is encoding. Avisynth allows you to work with video files with scripts. The most advanced filters for improving quality are on avisynth. You can create a .avs script in notepad and then view it in Virtualdub as if its a video file.

    You can start with just Virtualdub2. Use its built in deinterlacing filters (because those DVD’s are interlaced), resize filters (because the files on a DVD aren’t the correct aspect ratio) and video/audio compression. For X264, use quality based encoding at something like Q18 for almost perfect quality.

    Trek DVD’s are particularly hard because they are a mix of film source and TV special effects so you need a dynamic deinterlacer that can switch between 3:2 pulldown for film parts (live action) and straight deinterlacing for special effects (space battles).

    https://en.wikipedia.org/wiki/Three-two_pull_down#:~:text=Three-two pull down (3,of%20transferring%20film%20to%20video.&text=It%20converts%2024%20frames%20per,slight%20slow%20down%20in%20speed.

    https://forum.doom9.org/showthread.php?t=181209&page=26