Removable memory Planet : SSD or Solid State Drives!!!

Today Removable memory Planet will talk about one of the big items in the world of computers from the 2007 CES show in Las Vegas is the SSD or solid State Drive. This is actually technology that has been around for many years, but only now is it actually set to become something that consumer may actually get to use within the next year.



Removable memory Planet : Solid State Drive



Solid state is an electrical term that refers to electronic circuitry that is built entirely out of semiconductors. The term was originally used to define those electronics such as a transistor radio that used semiconductors rather than vacuum tubes in its construction. Most all electronics that we have today are built around semiconductors and chips. In term of a SSD, it refers to the fact that the primary storage medium is through semiconductors rather than a magnetic media such as a hard drive.

Now, you might say that this type of storage already exists in the form of flash memory drives that plug into the USB port. This is partially true as solid state drives and USB flash drives both use the same type of non-valotile memory chips that retain their information even when they have no power. The difference is in the form factor and capacity of the drives. While a flash drive is designed to be external to the computer system, an SSD is designed to reside inside the computer in place of a more traditional hard drive.

So how exactly do they do this ? Well, an SSD on the outside looks almost no different than a traditional hard drive. This design is to allow the SSD drive to put in a notebook or desktop computer in place of a hard drive. To do this, it needs to have the standard dimension as a 1.8, 2.5 or 3.5-inch hard drive. It also will use either the ATA or SATA drive interfaces so that there is a compatible interface.

Removable memory Planet : what is going to be in the future ?

Since our new technologies have been improved rapidly, the physical size of the storage keeps shrinking, the storage capacitor keeps growing and the cost of the storage is dropping severely. In the future you will be able to carry all data in your computer with you wherever you go. The removable storage memory will take a great roll in the future. Everybody will need it and it will affect every activity dealing with transferring data or information. Therefore, removable memory planet want you to know how about by video clip. 

This video clip, Removable memory Planet imported from youtube--->http://www.youtube.com/watch?v=CSnk0uFQNI0

Removable memory Planet will serves video clip like this on next time. Following me next on Removable memory Planet!!!

Removable memory Planet : How small is it going to be?

Today removable memory planet will talk about trends, one of the common trends in removable memory is to make the physical package smaller and smaller while increasing the amount of data that can be stored.

Magnetic storage is moving in two parallel directions. There are products coming out that use small cartridges with capacity measured in megabytes, and there are portable hard drives that range in the gigabytes.

One company has introduced a micro-optical drive. This tiny drive, about the size of a matchbox, uses tiny optical discs that are encased in a plastic shell. Each disc is capable of holding 500 MB of information. The drive actually reads both sides of the disc, meaning that the disc stores 250 MB per side.




Removable memory planet : Tiny Optical Discs



For the solid-stage storage Smart Media and Compact Flash cards continue to increase in capacity while maintaining their tiny size. Other solid-state memory devices, such as Sony's Memory Stick, are even smaller.

Removable memory planet : Compact Flash card


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Removable Memory Planet : Solid-State Storage

Today removable memory planet will talk about solid-state storage is a very popular type of removable memory for small devices is flash memory. Flash memory is a type of solid-state technology, which means that there are no moving parts. Inside the chip in the flash memory is a grid of columns and rows, with a two transistor cell at each intersecting point on the grid. The two transistors are separated by a thin oxide layer. One of the transistors is called the floating gate, and the other one is the control gate. The floating gate's link to the row is through the control gate. As long as this link is in place, the cell has a value of "1".

To change the cell value to a "0" requires a process called Fowler-Nordheim tunneling. Tunneling is used to alter the placement of electrons in the floating gate. An electrical charge, usually between 10 and 13 volts, is applied to the floating gate. The charge comes from the column, or bit line, enters the floating gate and drains to a ground.

This charge causes the floating-gate transistor to act like an electron gun. The excited, negatively charged electrons are pushed through and trapped on the other side of the oxide layer, which acquires a negative charge. The electrons act as a barrier between the control gate and the floating gate. A device called a cell sensor monitors the level of the charge passing through the floating gate. If the flow through the gate is greater than fiffty percent of the charge, it has a value of "1". If the charge passing through drops below the fifty-percent of the threshold, the value changes to "0".

Removable memory planet : Solid-State storage

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Removable memory Planet : Optical storage

Today removable memory planet will talk about the optical storage device that most of us are familiar with is the CD. A CD can store huge amounts of digital information on a very small surface that is incredibly inexpensive to manufacture. The CD surface is a mirror coverd with billions of tiny bumps that are arranged in a long, tightly wound spiral. The CD player reads the bumps with a precise laser and interprets the information as bits of data.

The spiral of bumps on a CD starts in the center. CD tracks are so small that they have to be measured in microns. The CD track is approximately 0.5 microns wide, with 1.6 microns separating one track from the next. The elongated bumps are each 0.5 microns wide, a minimum of 0.83 microns long and 125 nanometers high.

When you play a CD, the laser beam passes through the CD's polycarbonate layer, reflects off the aluminum layer and hits an optoelectronic device that detects changes in light. The bumps reflect light differently than the flat parts of the aluminum layer, which are called lands. The optoelectronic sensor detects these changes in reflectivity, and the electronics in the CD-player drive interpret the changes as data bits.

Removable memory planet : The basic parts of a compact disc



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Removable Memory Planet : Four types of magnetic storage devices in removable memory planet

There are four types of magnetic storage devices in removable memory planet


1. Magnetic storage disk

First type of magnetic storage devices in removable memory planet is magnetic storage disk, a disk is made of a thin piece of plastic coated with magnetic material on both sides. The tracks are arranged in concentric rings so the software can jump from "file 1" to "file 19" without having to fast forward through files 2 through 18. The disk spins like a record and the heads move to the correct track, providing what is known as direct-access.

Removable memory planet : Magnetic storage disk

2. Zip

Second type of magnetic storage devices in removable memory planet is Zip, for many years, magnetic technology has improved greatly because of the low cost of floppy disks and the immense popularity. One alternative that has become very popular is the zip. The main thing that separates a Zip disk from a floppy disk is the magnetic coating used. On a Zip disk, the coating has higher quality. The higher-quality coating allows the read/write head of the Zip drive to be smaller than on a floppy disk (by a factor of 10 or so). Zip drives use a variable number of sectors per track to make the best use of disk space. All of these features combine to create a Zip disk that can hold a huge amount of data (up to 750 MB).

Removable memory planet : Zip drive

3. Cartridge

Third type of magnetic storage devices in removable memory planet is Cartridge. Another memtod of using magnetic technology for removable memory is taking a hard disk and putting it in a self-contained case. One of successful products using this method is the Iomega Jaz. Each Jaz catridge is basically a hard disk, with several platters, contained in a hard, plastic case. The cartridge contains neither the heads nor the motor for spinning the disk.

Removable memory planet : Current jaz drive uses 2-GB cartridge



4. Portable drive

Last type of magnetic storage devices in removable memory planet is Portable drive. Completely external, portable hard drives are becoming popular, due to the USB technology. These units, like the ones inside a typical PC, have the drive mechanism and the media all in one. The drive connects to the PC via USB cable and, after the driver software is installed the first time, is automatically listed by Windows as an available drive.



Removable memory planet : 20-GB Pocket Drive

Another type of portable hard drive is called a micro drive. These tiny hard drives are built into a card called PCMCIA card that can be plugged into any device with PCMCIA slot, such as a laptop computer.

Removable memory planet : Micro drive which can hold 340-MB



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Removable Memory Planet : Portable memory

Again with  removable memory planet, today removable memory planet will present about modern removable memory devices offer an incredible number of options, with storage capacities ranging from the 1.44 megabytes (MB) of a standard floppy to the upwards of 20-gigabyte (GB) capacity of some portable drives. All of these devices fall into one of three categories

1) Magnetic storage

2) Optical storage

3) Solid-state storage

Magnetic storage

Removable memory planet mentioned about magnetic storage is the most common and enduring form of removable memory technology. For example, the 1.44-MB floppy-disk drives using 3.5-inch diskettes have been used around for about 15 years and they are still found in our everyday life. Removable magnetic storage uses a drive which is a device that connects to the computer. The way to use is inserting the media, which is the part that actually stores the information, intothedrive.

The media used in removable magnetic memory devices is coated with iron oxide. This oxide can be permanently magnetized if exposed to a magnetic field. The media is called a disk or a cartridge. The drive uses a motor to rotate the media at a very high speed and it can access the stored data by using smell devices called heads.

Each head has a tiny electromagnetic, which consists of an iron core wrapped with wire. The electromagnetic applies a magnetic flux to the oxide on the media and the oxide permanently remembers the flux it sees. During writing, the data signal is sent through the coil of wire to create a magnetic field in the core. At the gap, the magnetic flux forms a fringe pattern. This pattern bridges the gap, and the flux magnetizes the oxide on the media. During reading, the read head pulls a varying magnetic field across the gap, creating a varying magnetic field in the core and therefore a signal in the core. This signal is sent to the computer as binarydata.

Removable memory planet : Magnetic storage disk

Removable memory planet : Disk drive

Removable Memory Planet : The reasons why the removable memory is useful

Removable memory planet will give you  the reasons why the removable storage is useful.

1. Commercial software
2. Making back-up copies of important information
3. Transporting data between two computers
4. Storing software and information that no longer needed
5. Copying information to give to someone else
6. Securing information

Welcome to removable memory planet!!!

Removable memory planet!!!!!

 Long time ago, people used many kinds of material such as leaf, rock, and paper in order to keep memory. As the global technology has been improved, the material used to store the data has been improved also. This storage has been around us in everyday life. Removable memory has been introduced to the world since the computer emerged. Early removable memory was base on magnetic tape. It was like the one that used by an audio cassette. Actually before that, early computer even used paper punch cards to storage information.

Now we have come a long way since the days of punch cards which can only store a few bits of data. As it has been developed, new removable memory devices can store hundred of megabytes ( and even gigabytes ) of data on a single disk, cassette, card or cartridge. This blog will provide the useful information about three major storage technologies. Each of those includes devices each technology used and what is going to be in the future for this medium because this is removable memory planet. if anyone of you think I might have done something wrong or have any suggestions, please do not hesitate. Thank you^^