A drum as Memory...IBM had a Drum memory for the IBM 650 computer....wrote a Fortran program for it that buried it!
Posted on 04/04/2005 9:25:04 AM PDT by Ernest_at_the_Beach
Hitachi's division of storage technologies, Hitachi Global Storage Technologies, is expected to announce they will begin selling 1-terabyte desktop drives later this year.
In order to increase storage capacities, HGST is employing perpendicular recording, which Macworld describes as:
Perpendicular recording is perhaps the most significant near-term step in the evolution of hard-disk drive technology. The method is similar to the longitudinal recording used in today's drives in that it relies on magnetically charged particles for data storage. In today's drives, the north and south poles of the magnetic particles run parallel to the disc but in the new method they are arranged perpendicular to the disc, as the name suggests.
The result of this new arrangement is that each particle occupies a smaller area of the disk's surface and so more particles can be crammed onto the disk. This is measured as the areal density and today's most advanced drives can store between 100Gb (gigabits) and 120Gb of data in a square inch of disk space.
With this method, HGST envisions storage capacities of 230Gb per square inch by 2007. This technology would also enable the 1TB, 3.5-inch drive and 20GB, 1-inch drive. Hitachi is expected to officially announce their intentions later today.
A drum as Memory...IBM had a Drum memory for the IBM 650 computer....wrote a Fortran program for it that buried it!
The CPU on the left with the drum drive on the lower right, and the programmers panel above it.
just amazing....
Check out this :
AMD Sempron 2800+ Boxed Processor with Motherboard ~~ Price: $ 109.99
It's about 40 times greater than the sum total of human literature.
(There are 500,000 characters (bytes) per book, on average, which is two books per Megabyte, or two thousand books/Gigabyte, or two million books per Terabyte. Around Fifty million books are known to have been published, ever; that's 25 Terabytes. Granted, not every book can be expressed in ASCII, but most of the books are in English, and 16-bit Unicode can handle the small remaining fraction. We haven't even considered compression; plain text compresses easily by a factor of 4.)
I need to crank up my scanner and make some room around here.
But why? Who would watch it?
Eventually petabyte drives could be used in place of memory
Do you mean RAM...or human memory?
I would think that you could start digitizing human minds with one of these things as well.
Uh - huh. And....what would be your input device for this process?
;-)
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.
