21–30 of 31 posts
tl;dr, Vibration due to shouting causes measurable impact on spinning disk performance, increasing io latency. I guess this wouldn't apply to SSD's though?
Are datacentres transitioning to SSDs ? Or have they already?
Those were the days....
It seems almost common to break HDDs just while testing the firealarm. There are several incidents after a quick search. The latest big one was maybe this April in the Nasdaq's Scandinavian Data Center. https://m.slashdot.org/story/339921
Blue Note: How Intentional Acoustic Interference Damages Availability and Integrity in Hard Disk Drives and Operating Systems [pdf] https://spqr.eecs.umich.edu/papers/bolton-blue-note-IEEESSP-...
Ah, it's a classic. And wow, Brendan Gregg looks so young. And video uploaded by Bryan Cantrill himself. Damn it SUN had so many superstars yet it's Oracle that survived.
Brendan and Bryan in particular seem to be doing really well. Brendan is senior performance architect at Netflix http://www.brendangregg.com/bio.html Bryan is the CTO at Joyent, a cloud computing pioneer recently acquired by Samsung. https://www.joyent.com/about/management/bryan-cantrill
Not a criticism of your statement, just an opportunity to point that out.
It seems almost common to break HDDs just while testing the firealarm. There are several incidents after a quick search. The latest big one was maybe this April in the Nasdaq's Scandinavian Data Center. https://m.slashdot.org/story/339921
It seems almost common to break HDDs just while testing the firealarm. There are several incidents after a quick search. The latest big one was maybe this April in the Nasdaq's Scandinavian Data Center. https://m.slashdot.org/story/339921
We had servers that started an alert and a buzzer when ecc errors exceeded some internal threshold. The buzzer was making the chassis vibrate at the disks harmonious frequency and the performance dropped 30%.
After that I made every new hire to my team watch this video.
Now I deal almost exclusively with SSDs and this specific failure mode is no longer an issue.
Use harddisks as microphones? Nice!
tl;dr, Vibration due to shouting causes measurable impact on spinning disk performance, increasing io latency. I guess this wouldn't apply to SSD's though?
I can personally attest that there is an extreme version of this effect: do not use hard disk in PA/DJ situations... I crashed several of my early disks due reading MP3 data proximal to a certain pair of 18" push-pull PA subwoofers...