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Joined 2 years ago
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Cake day: June 13th, 2023

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  • How is it a retcon? The use of giga- as a prefix for 109 has been in use as part of the metric system since 1960. I don’t think anyone in the fledgeling computer industry was talking about giga- or mega- anything at that time. The use of mega- as a prefix for 106 has been in use since 1873, over 60 years before Claude Shannon even came up with the concept of a digital computer.

    if anything, the use of mega- and giga- to mean 1024 is a retcon over previous usage.



  • It’s so absurdly big. Our galaxy (the Milky Way) is estimated to have between 100 and 400 billion stars in it. For a long time we thought our galaxy was all there was, it wasn’t until 1925 when Edwin Hubble was able to prove that M31 was not a nebula or cluster of stars in our galaxy, but in fact an entirely different galaxy altogether that we realized there are more galaxies out there.

    Look at the Hubble Ultra Deep Field picture

    This was a taken by pointing the Hubble Space Telescope at a basically empty bit of space 2.4 by 2.4 arcminutes in size (for comparison, the moon has an apparent size of about 30 arcminutes, or half a degree). So an absolutely tiny part of the sky. It contains about 10.000 galaxies.

    The observable universe is estimated to have between 200 billion and 2 trillion galaxies in it, with on average about 100 billion stars per galaxy. It’s absolutely mind blowing.



  • I’d want to be able to lose two drives in an array before I lose all my shit. So RAID 6 for me.

    Repeat after me: RAID is not a backup solution, RAID is a high-availability solution.

    The point of RAID is not to safeguard your data, you need proper backups for that (3-2-1 rule of backups: 3 copies of the data on 2 different storage media, with 1 copy off-site). RAID will not protect your data from deletion from user error, malware, OS bugs, or anything like that.

    The point of RAID is so everyone can keep working if there is a hardware failure. It’s there to prevent downtime.