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modern storage medium
modern storage medium
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When the word “storage” is discussed as related to computers, one does not usually mean a closet or desk compartment. Storage in this sense refers to a medium to which electronic data is stored whether permanently or temporarily. In fact, the Computer Dictionary Online (2008) states that storage is, “a device into which data can be entered, in which they can be held, and from which they can be retrieved at a later time.” Several types of storage mediums exist for electronic data including hard disks, floppy disks, RAM, CD-ROM, and tape each of which have its own specific strength. The speed at which data can be retrieved from these storage mediums can also aid in determining the overall speed of a computer. Let us begin with a look at the optimal uses of each storage type mentioned above.
Hard disks are almost solely used for permanent data storage such as when a user saves a file to the “My Documents” folder; the file is saved to the computer’s hard disk. Most computers have them in one form or another. The IDE and SATA versions come in 2-½ inch for laptops and 5-¼ inch for desktops. Servers normally have SCSI drives, which are more expensive, have a longer life and are faster than IDE and SATA drives. However, the newer SATA drives are coming close to catching up with SCSI in terms of spindle speed and are starting to be used by major vendors like HP in servers. The spindle speed of IDE and SATA drives range from 4200 RPM to 7200 RPM with 7200 being the standard for most off the shelf desktop drives and 5400 for laptops. SCSI drives range from 10,000 RPM to 15,000 RPM and this high speed makes them perfect for servers that need to serve many clients at once (Gilbert, 2007). These speeds are fixed though and no matter what the clock speed of a desktop or server’s CPU, the data can only be retrieved as fast as the magnetic head can locate it on the platter. A similar principal is used by a floppy disk.
Floppy disks store their data on a “small, circular piece of metal-coated plastic similar to audio cassette tape” (Brown, 2008, para. 2). Floppies were very popular before the CD-ROM came on the scene. They were used to store software installation programs and “sneaker-netting.” Today they are still used for things like flashing the BIOS in a PC and disaster recovery situations.
It is a portable storage device that can be attached to a computer through a USB or FireWire connection, or wirelessly. They have high storage capacities and are often used to back up computers or serve as a network
ROM chips deliver fast-access to non-volatile information. It has a tendency to be used to store the instructions required to load the computer system.
2X CD-ROM drive: This CD-ROM drive can transfer data from the CD-ROM at 300 KB per second while using less than 40% of the CPU bandwidth and has an average seek time of less than 400 milliseconds.
A CD is a fairly simple piece of plastic, about four one-hundredths (4/100) of an inch (1.2 mm) thick. Most of a CD consists of an injection-molded piece of clear polycarbonate plastic. During manufacturing, this plastic is impressed with microscopic bumps arranged as a single, continuous, extremely long spiral track of data. Once the clear piece of polycarbonate is formed, a thin, reflective aluminum layer is sputtered onto the disc, covering the bumps. Then a thin acrylic layer is sprayed over the aluminum to protect it. (Brian 1)
So people see there is a lot of data out there. The storage capabilities of hard drives have increased massively over the years, but the access speeds, the rate at which data can be read from drives have not kept up. One typical drive from 1990 could store 1370 MB of data and had a transfer speed of 4.4 MB/s [2], (1370 MB)/(4.4 MB/s) = 311 s = 5.1 minutes, so the time for reading all the data from a full drive was around 5 minutes at that time. After 20 years, one terabyte drives are the norm, but the transfer speed is around 100 MB/s, so it takes more than two and a half hours to read all the data off the disk.
Database in main memory to circumvent the growing ratio of storage capacity/latency of hard drives.
The memory capacity of that time was rather limited. “There were not many external drives, the only external drives of that time were I/O cards, I cards and O cards”
In the year of 2013, the magnetic hard drive media was primarily hard disks, which are used widely for storing the data from computer to it as well as the audio and video files signals. In the field of the computing, they shows as the
Ever since I have used a computer, I have been captivated by the incredible world of the digital industry. One of the earliest memories I have was to use a floppy disk, the idea of capturing something virtual and integrating it into a physical object fascinated me. As technology has advanced so has its implements, I recall the floppy disk being as big as my hand and to now hold a memory stick smaller than my thumb with 91022.2 times more storage capacity just astonishes me. The advancement of computers at this exponential rate makes me wonder what amazing phenomena could occur in the next century and by studying computer science I can be part of this exponential growth.
What is a flash Drive? Well a USB Flash drive is a memory storage device that is plugged into a computer or other mobile devices. Flash Drive also called Thumb drives are very convenient for users, they are small and light weight and have a memory storage ranging from 512MB to 64Mb. (Gary B. Shelly).Most flash drives are removable and rewriteable. USB Flash drives are typically used for backups or transfers of computer files. Flash drives consist of small printed circuit boards carrying circuit elements, and USB connecters that are installed electorally, and are protected by plastic, metal, and sometimes a rubberized case. The USB connecter is usually protected by a removable cap that connects to the drive. Power is drawn from computer when the USB flash drive is connected. When connected users can then access whatever has been backed up or transferred to the Flash drive.
Another widely available optical disc technology is the Digital Video/Versatile Disc, abbreviated as DVD. While a CD holds either 650[MB] or 700[MB] of data, a DVD can hold up to 25 times more. There is even another type of optical discs, the so-called high capacity optical discs, which are characterized by offering the user storage capacities typically in the range from 20[GB] to 50[GB], (approximately between 30 to 75 times more data than a CD). At this writing, four high capacity optical discs have been announced so far: the Blu-ray disc (BRD) [Hitachi et al., 2002], the advanced optical disc [Toshiba and NEC, 2002], the Blue-HD (High Density) disc [OES and AOSRA, 2002] and the HD-DVD-9 disc [Bros, 2002]. All are in principle rewritable discs, although ROM versions are being discussed.
So if you’re a photographer or someone that is looking for storage, the best option would be to get yourself a hard disk drive, it might be slow, but you’re paying far less than a solid state drive and getting a lot more storage. The more gigabytes the solid state drive, the more it will cost as they are the new technology, and to get the newest technology, you have to pay the big bucks. On August 15, 2015, Samsung developed and released the world’s largest hard drive at 16TB, and it’s a solid state drive… I wonder how much that is going for. All in all, the hard disk drive easily wins on price, capacity and availability, whilst the solid state drives wins on speed (fragmentation), form factor, durability and
You had a long day at work; the traffic is bumper to bumper on the freeway. You are almost home and you get pulled over and cited a speeding ticket. You finally get home and get on your computer to research some lawyers to get out of that speeding ticket and your computer seems to be not acting right. Well it is time to format the hard drive.
that put large volumes of books and papers on CD-ROM. A single CD-ROM can hold
In the early 1980’s the Microsoft crew announced their first windows operating system and they name it Microsoft Disk Operating System (MS-DOS) (Micrsoft, 2014). The Disk Operating System was used by personal computers that were built by IBM. MS-DOS had no graphical user interface, the users could only open, navigate, manipulate, and view their files on their person...