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#perpendicularmagneticrecording#pmr#harddrive

Get Perpendicular

teraera08

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  • Recommended by 2 people: 2 on Hacker News.
  • A classic. People kept recommending it from 2023 to 2026.
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Beginner. No background in the topic needed.

94K views18 years ago2 recommendations

HardwareHistory and cultureRetro computingElectronics

An animated Schoolhouse Rock style cartoon explaining perpendicular magnetic recording technology used to increase hard drive storage density.

In March 2005, Hitachi Global Storage Technologies demonstrated an areal density of 230 gigabits per square inch (Gb/in2) on perpendicular recording technology, the highest areal density achieved to date based on vertical recording. This accomplishment represents a doubling of today's highest data densities on longitudinal recording technology. Hitachi presents its perpendicular storage strategy in the style of Schoolhouse Rock.

Why it's here

2 people recommend this

What people say. Engineers fondly recommend this as a fun, memorable, and incredibly clear explanation of perpendicular magnetic recording.

pcurveon Hacker News • Recommends

On “Ask HN: What's your favorite illustration in Computer Science?”

maybe not CS concepts, but wanted to re-share Perpendicular disc storage from Hitachi. link to this video It's a simple concept to explain, but animation sure makes it fun and lasting.
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staticshockon Hacker News • Recommends

On “What Is Z-Angle Memory and Why Is Intel Developing It?”

That song is etched into my memory and bring back a flood of great feelings. Daily Motion is giving me a playback error, but here's a copy from youtube: link to this video
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u/case-o-nutsin r/compsci • Mentions

On “A question I'm hoping you guys could answer”

First, not computer science. Second, more or less, you're magnetizing tiny bits of spinning rust when you're talking about hard drives. Wikipedia has a pretty awful article, here, but it might help. SSDs are a bit more complicated: You're effectively trapping electrons in an insulated bucket by pumping them in by force (or draining them out again.), then measuring its conductivity to see what state its in. A more in depth description is here link to this video
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jamesbression Hacker News • Mentions

On “Western digital acquires Hitachi Global Storage Tech for $4.3B”

Maybe you forgot this? Hitachi School House Rock video... link to this video "Get Perpendicular" Hitachi Global Storage Technologies.
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nlyon Hacker News • Mentions

On “The Moore's Law blowout sale is ending”

> or if we radically change the fabrication process and turn transistors sideways This reminded me so much of this: link to this video
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baschon Hacker News • Mentions

On “Western Digital admits 2TB-6TB WD Red NAS drives use shingled magnetic recording”

That's what I'm wondering though. Nearly all the WD data center drives are marketed as Ultrastar. Is this marketing, or did the HGST entity supplant WD enterprise during "integration" in the last two years? link It looks like the only surviving product names are Ultrastar and CinemaStar. Nothing is labeled HGST anymore. Most of the HGST Helium disks were SMR, if I'm not mistaken. As of now, given the two HelioSeal series, one of the two is SMR. Side Note: Hitachi had such a great thing going with their Schoolhouse Rock meets Dino DNA commercial. I wish this would have continued. link to this video
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