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VentureBeat: The death of disk? HDDs still have an important role to play
- Subject: VentureBeat: The death of disk? HDDs still have an important role to play
- From: jdb10987 at yahoo.com (jim bell)
- Date: Thu, 5 Sep 2019 04:54:06 +0000 (UTC)
- In-reply-to: <CAMjeLr91T9R7APsuxQVuM3WbqDsxAfwn4=OYDeDX4FMcoRdGdQ@mail.gmail.com>
- References: <[email protected]> <[email protected]> <CAD2Ti2_zD=-Rr5RtFGiynUK2aFj2LOk0ZT4awJ4F6tZi1=Kh1g@mail.gmail.com> <CAD2Ti2-gwz6i+rNeTLTY_rNnGoPaekYr1Lj06CkVOGgC6v+RYA@mail.gmail.com> <CAMjeLr91T9R7APsuxQVuM3WbqDsxAfwn4=OYDeDX4FMcoRdGdQ@mail.gmail.com>
On Tuesday, September 3, 2019, 03:18:40 AM PDT, \0xDynamite <dreamingforward at gmail.com> wrote:
>The reason I asked because I can't figure out how you can get
persistent memory without burning circuits. An internal battery
perhaps or a writable crystal, but.... how?
In the early 1970's, the computer industry went from magnetic core ( https://en.wikipedia.org/wiki/Magnetic-core_memory ; ) to static and dynamic RAM, losing non-volatility in the process.  It was possible to run a CMOS static RAM on a tiny battery, to maintain data when the main system power was turned off.
 The industry developed UV-erasable EPROM as a substitute, which allowed only the erasure of the entire memory chip, , and some early EEPROM. (Electrically erasable programmable Read-Only-Memory).Eventually "flash-EPROM" was developed.  https://en.wikipedia.org/wiki/Flash_memory ;
            Jim Bell
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