51–60 of 82 posts
Pretty funny to see this video at the top of HN! My kids still think I'm an idiot for not having somehow parlayed the enduring popularity of this video into being a YouTuber -- despite my protestations that I was merely the videographer here. If anyone is curious about the video's origins, I had a fun conversation about it with Ben Sigelman a few years ago.[0] [0] https://www.youtube.com/watch?v=_IYzD_NR0W4
I wouldn't want to spend too much time in there without ear protection! Is it common for data centers to be this loud?
There's an interesting little paper 'Acoustic Denial of Service Attacks on HDDs' where they use a function generator to find resonant frequencies which cause issues with spinning disks
https://andrewkwong.org/docs/Kwong-HDDphone-IEEE-SP-2019.pdf
Earlier quoted context omitted.
And the other comment made me google noise vs. pressure.... Looks like Siemens did an investigation and tested various parameters (pressure, noise, vibration) independently. They point towards noise, not pressure. Really interesting as I am _sure_ I was told it is pressure. But that might be 100% wrong! https://virz.de/wp-content/uploads/2020/05/2015-White-Paper-...
Noise really is just pressure, with a high frequency time component.
The feeling of anti-sound is quite distinctive.
Pretty funny to see this video at the top of HN! My kids still think I'm an idiot for not having somehow parlayed the enduring popularity of this video into being a YouTuber -- despite my protestations that I was merely the videographer here. If anyone is curious about the video's origins, I had a fun conversation about it with Ben Sigelman a few years ago.[0] [0] https://www.youtube.com/watch?v=_IYzD_NR0W4
Pretty funny to see this video at the top of HN! My kids still think I'm an idiot for not having somehow parlayed the enduring popularity of this video into being a YouTuber -- despite my protestations that I was merely the videographer here. If anyone is curious about the video's origins, I had a fun conversation about it with Ben Sigelman a few years ago.[0] [0] https://www.youtube.com/watch?v=_IYzD_NR0W4
that was really funny
Pretty funny to see this video at the top of HN! My kids still think I'm an idiot for not having somehow parlayed the enduring popularity of this video into being a YouTuber -- despite my protestations that I was merely the videographer here. If anyone is curious about the video's origins, I had a fun conversation about it with Ben Sigelman a few years ago.[0] [0] https://www.youtube.com/watch?v=_IYzD_NR0W4
I have a colleague who was on the on-call rotation for some of our systems hosted in a datacenter our company owned. During this rotation he got unlucky in that the datacenter detected fire and decided to disperse gas that displaces oxygen (I think it was Halon gas?). Those systems are no joke - you have a short warning before you are supposed to put on a mask or get out of the server room otherwise you will just suf…
I was once told by a datacenter operator that this is due to the pressure change when they pump the gas in and that we should plan on replacing all HDDs should the fire alarm go off. ...and I think it was Argon...
On the top floor of the building a tip-over failure replacing an argon bottle broke the valve off the end and emptied the compressed lot of Argon in short order.
Argon being colourless, ordourless, heavier than air = whole building "anti-suffocation" evacuation. But no fire problem!