Flash Disk is a data / file storage tool in the form of NAND. In this device, embedded controller and memory storage data that is non-volatile alias will not be lost even though there is no electric power. Flashdisk components are simpler and relatively fewer compared to hard drives. This is because the flash does not need a disc, motor, or other parts that work mechanically.
The development of flash disk is very fast. Flash disk when first marketed in 2000 has only a capacity of 8 MB. Now, in 2011, only 11 years ago, the largest capacity of the flash disk marketed was 256 GB, 32,000 times that amount. This rapid development is due to researchers having discovered increasingly sophisticated technology. The available material becomes increasingly sophisticated, especially after the discovery and successful use of semiconductor metals. Not only the disk, the USB port continues to grow. The first USB port introduced in 1996, USB 1.0, has a maximum data transfer rate of 12Mbit / s. Whereas USB 2.0, which was released in 2000, has a data transfer rate of 480 Mbit / s. 40 times that of USB 1.o. Then in 2010 it was marketed USB 3.0 which has data transfer speeds of up to 5Gbit / s, 10 times that of USB 2.0.
- A USB flash drive is a NAND type flash memory data storage device that has an integrated USB interface. These flash drives are usually small, lightweight, and can be read and written. As of November 2006, the available capacity for USB flash drives is from 128 megabytes to 64 gigabytes.
- USB flash drives have many advantages compared to other data storage devices, especially diskettes. This tool is faster, smaller, with greater capacity, and is more reliable (because it has no moving parts) than floppy disks.
The discovery of Flash Memory (NOR and NAND) by Dr. Fujio Masuoka in 1984 while working on Toshiba while the name flash itself was given by his colleague Mr. Shoji Ariizumi. The traded NOR type flash chip type was introduced by Intel in 1988. NOR flash is a basic flash that takes a long time to erase and write, but provides full addresses and data paths, giving random access to all memory locations. But it is very good to replace the old ROM, where it is possible to update the stored program code. An example is the BIOS NAND flash announced by Toshiba in 1989, which can make the process of erasing and writing faster, requiring a small space for the cell chipper. With increasing capacity but the cost can be reduced causing this type of flash suitable for secondary storage. It is not certain who developed it for the first time because there were three companies that disputed, namely M-Systems, Netac, and Trek 2000 Flash drives began to be marketed in 2001 in America by IBM. The size of data that can be stored at that time was 8 MB, the last data in November 2006 has reached 64 GB. Not only the size has grown, but the shape and function has also changed. There are flash drives that use a rotary design so we don’t have to worry about losing the cover. There is also a rubber drive flash drive that is waterproof or equipped with a carabineer clip so that it is easy to hang. Even the flash drive has been made in the form of a credit card model. It’s called wallet-friendly USB. The size is only 86 x 54 x 1.9 mm. So, it can be stored safely in a wallet. For security problems the flash drive currently has to protect the data so that it is not accessed by people who are not the owners. How it works currently used include using full disk encryption or physical authentication tokens. The latest system that was introduced in the middle of 2005 is biometric fingerprinting. However, this security method is very expensive because it uses high technology. In fact the use of flash drives has evolved in many ways. For example in an article described the steps to set up a flash drive to boot Windows XP. The main requirement is that the mother board and BIOS of our computer can support boot management from a flash drive. Some applications can also be run from a flash drive without first having to install it to the computer
According to the history of flash development there are four flash disk entities or USB flash drives, namely Dov Moran from M-Systems, Pua Khein Seng Phison Electronics, Technology Track and Netac Technology. Of the four entities, the flash disk continues to be modified both in form and function until finally the flash is commercialized to the general public.
In further developments, the flashdisk uses a standard data transfer (bus) serial capable of transferring data with a clock frequency of 480 Mb per second. The next generation can transfer data with varying speeds, such as “180X” or 180 x 150 KIB / s. Even some USB flash drives can transfer up to 5 GB per second since adopting USB 3.0. However, most flash drives on the market do not utilize USB 3.0 due to controller limitations.