File:How a Hard Drive Works - By Nick Parlante.webm

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Original file ‎(WebM audio/video file, VP8/Vorbis, length 6 min 5 s, 1,280 × 720 pixels, 2.25 Mbps overall, file size: 97.81 MB)

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How a Hard Drive Works How a hard drive works:

  • When you save a document, it gets written somewhere "non-volatile" that keeps its state even when the power is off. How does that work for a hard drive?
  • The hard drive contains a spinning platter with a thin magnetic coating
  • A "head" moves over the platter, writing 0's and 1's as tiny areas of magnetic North or South on the platter
  • To read the data back, the head goes to the same spot, notices the North and South spots flying by, and so deduces the stored 0's and 1's
  • A Modern hard drive can store well over a trillion 0/1 bits per platter, so the individual North/South spots are quite small
  • "Flash" storage is made with chips (no moving parts) and is gradually replacing spinning hard drives like this. Flash chips are what's inside camera SDHC memory cards and USB storage keys.
Date
Source http://cs.stanford.edu/people/nick/how-hard-drive-works/
Author Nick Parlante
Permission
(Reusing this file)		 These videos are released under the CC Attribution Sharealike 3.0 license

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w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Nick Parlante
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This file, which was originally posted to http://cs.stanford.edu/people/nick/how-hard-drive-works/, was reviewed on 5 April 2014 by reviewer Natuur12, who confirmed that it was available there under the stated license on that date.

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Date/TimeThumbnailDimensionsUserComment
current21:19, 13 March 20146 min 5 s, 1,280 × 720 (97.81 MB)Jacopo Werther (talk | contribs)1280 × 720
19:41, 13 March 20146 min 5 s, 640 × 360 (26.49 MB)Jacopo Werther (talk | contribs){{Information |Description=How a Hard Drive Works |Source=http://cs.stanford.edu/people/nick/how-hard-drive-works/ |Date=2012-5 |Author=Nick Parlante |Permission= |other_versions= }} {{cc-by-sa-3.0|Nick Parlante}} Category:Videos of hard disks

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Format Bitrate Download Status Encode time
VP9 720P 1.12 Mbps Completed 00:26, 29 August 2018 10 min 16 s
Streaming 720p (VP9) Not ready Unknown status
VP9 480P 599 kbps Completed 00:24, 29 August 2018 8 min 18 s
Streaming 480p (VP9) 500 kbps Completed 08:01, 18 March 2024 3.0 s
VP9 360P 374 kbps Completed 00:20, 29 August 2018 5 min 3 s
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VP9 240P 259 kbps Completed 00:20, 29 August 2018 4 min 29 s
Streaming 240p (VP9) 160 kbps Completed 06:00, 2 January 2024 2.0 s
WebM 360P 576 kbps Completed 21:28, 13 March 2014 8 min 57 s
Streaming 144p (MJPEG) 1 Mbps Completed 23:03, 14 November 2023 17 s
Stereo (Opus) 96 kbps Completed 01:22, 24 November 2023 9.0 s
Stereo (MP3) 128 kbps Completed 18:42, 9 November 2023 13 s
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