China
Africa
Explore chapters and articles related to this topic
Magnetic Recording
Published in David Jiles, Introduction to Magnetism and Magnetic Materials, 2015
Tape remains as a viable alternative to disk in some situations due to its lower cost per bit. Magnetic tape has the benefit of a comparatively long duration during which the medium can retain the stored data. The highest capacity tape media are generally on the same order as the largest available disk drives (about 5 TB in 2011). This is a significant advantage when dealing with large amounts of data particularly when there is less need for rapid access to the data and also when security is an issue. Though the data storage density of tape in bits per square inch is much lower than for disk drives, the available surface area on a tape is far greater and this can compensate for the lower data storage density. From 2002 onward, there was great interest in increasing the data capacity of magnetic tape. Manufacturers of modern data tape claim that magnetic tape is capable of 15–30 years of reliable archival data storage.
Semiconductor Memory Technologies Overview
Published in Shimeng Yu, Semiconductor Memory Devices and Circuits, 2022
There are other storage media beyond the technologies listed in this pyramid. For archiving purposes, magnetic tapes are still being used for the large volume “cold” data storage due to their ultra-low cost. Optical discs such as CDs, DVDs, or Blu-ray are also used for information distribution purposes. The magnetic tapes, optical discs, and HDD will not be covered in this book as they are not fabricated with the silicon-manufacturing processes. To summarize, the focus of this book will be placed on the semiconductor memory technologies such as SRAM, DRAM, NAND Flash, and emerging memories.
State-of-the-Art and Future Trends
Published in Dobrivoje Popovic, Vijay P. Bhatkar, Distributed Computer Control for Industrial Automation, 2017
Dobrivoje Popovic, Vijay P. Bhatkar
Magnetic tape drives are the most popular medium for archival data storage, or high-volume back-up storage. Two varieties of tape media are presently used: half-inch, reel-to-reel drives and quarter-inch tape drives. Quarter-inch tape cartridges are already available with capacities over 200 MB with data transfer rates up to 3 MB/sec, which better the performance of half-inch, reel-to-reel drive. Small, 0.15 inch tape cassette drives are available with a storage caacity of 12 MB for lower-capacity storage applications.
Reimagining the history of GIS
Published in Annals of GIS, 2018
Many advances have occurred since those early days. Hard disk and vastly increased mass storage have almost entirely replaced magnetic tape. Compute speed has increased by many orders of magnitude: the smart phone or laptop of today has far more power than the IBM 360 of the mid 1960s, and massively parallel machines now offer peta-scale computing.