Capacity storage devices - Data Warehousing Part Iii

Hello good day, greetings to all followers of this blog, I think this time if you let them rest a few days, but I'm back after you finish a project (the development of a web page). Because once I show them what I do apart from, but now ah we'll close today's post with the subject data storage.

Well we have seen the binary to be the cream form as the computer connects, we also saw how to measure the storage capacity and in this post we will review the storage capacity with some devices and the computer itself.

Since the incidence of computing have been around in some way or other units as it were to save or store data from punch cards to sophisticated technology developed for this purpose.

The devices we've seen earlier in the thread for Hardware-storage devices have much to do with the topic of this post for the following, all devices have the function of storing information and data have a certain capacity each of them, this ability is determined by the number of gigabytes (GB), megabytes (MB) ... etc, available to the device in question from there depends on the number of documents, images, songs, presentations, designs, drawings, games, etc. ... can be stored.



So let's try to describe one by one the Storage Devices and show how to compare the difference in storage between each of these devices.

This is important to know because it will allow us to clearly understand the features that has a computer or storage device, know what their storage capacity, as it is very common to find plenty of publicity which describes these measures of capacity.

Ram Memory Capacity

Start with the RAM of the computer (see computer hardware post) is also used as measures of capacity and although we as users do not directly manipulated by being placed on the motherboard and this in turn installed in the inside of the cabinet is important to know that has some ability and is also an indispensable part because it interferes with all processes that takes place the computer, and also at the time of making the choice for a purchase is necessary and memory capacity has that capacity expansion will be in the future.

These memory modules vary in size, type and capacity according to the computer on which are placed either a Computer Lap top or desk, these modules are placed on the memory banks available to the motherboard, the size of These memory banks can be of the SIMM, DRAM, SDRAM, SDR, DDR etc. (Note that this area of ​​the computer should be handled by specialized support staff as it may cause damage if not already dominates-handling in another subject thoroughly we will play something on the maintenance and updating of computers, for now only as a reference), these modules have some capacity has been increasing, remember the Kb, Mb, Gb, Tb capabilities ... in this part of the computer currently handling capabilities GigaByte onwards although there are still many computers with smaller capacities and likewise this type of memory modules work in multiples of 2, ie the first teams had modules with capacities in Kb-After the Megabyte had arrival of the modules 32, 64, 128, 256, 512 - takes the leap and get the Gigabyte modules 1, 2 and so on.

Capacity of Storage Units

Storage devices where the user directly interferes are a great variety and are used to store data and information in order to be used to process either at the time, for future use or simply storage consulting and support.

The storage devices may be of magnetic, optical and chip-type and these are:

Magnetic Storage

Floppy (Flopy Disc): Magnetic Storage. Although increasingly these long disused were indispensable and evolved in several stages, could be found diskettes measures 8 ", 5.25" and 3.5 "with capacities ranging from 360Kb, 740 Kb, Mb 1.44 over time and with the emergence of new devices have been practically forgotten. They were portable devices as the user inserts it into the drive and removed when desired are also known as Floppy or Floppy.

Hard Drive (DD): Magnetic Storage. It is installed on the inside of the cabinet but may also be found on external or removable models. This consists of several dishes. Each dish covered with a magnetic layer, requires two heads read / write, one for each side, these heads supported by an arm that make the role of location, all moving at the same time. Access are much faster than floppy disks and can store more information, and currently drives on the market ranging from 80 Gigabytes 160, 250, 500 and in some recent teams have already been incorporated capacity hard drives with terabytes .

For the type of interface or connection, hard disks can be of type IDE (ATA), Serial ATA and SCSI, connected directly to the motherboard or used as external media.

Magnetic Tape Units: Magnetic Storage. The tapes are currently used primarily as a backup medium. They have a sequential access medium only, ie the data stored there is a place next to the other from start to finish, while the hard disk in a random access medium (more directly).

To understand this random sequence and we give an example:

Imagine a music cassette that are 10 or 12 songs but I just want to listen to track 3, for this I have to play the first 2 or fast forward the tape, because these are arranged sequentially.

Now imagine a CD or hard drive where we stored this music and we would only listen to track 3, this changes the way we can access and go directly to the track you want to hear, this is known as random access (more direct).

For many and the beginning of the computer tapes were very important role because it will be among the first large media storage capacity. At this time there have been several advances in the composition of the tape, wrapping, and the density of the data. The main difference between tape storage and tape drives is that the means of access is a sequential

The magnetic tape technology has also had major changes since the width of the tape, sizes and most have been developed to be less encapsulated or greater capacity.

Optical Storage

Over the years, created new ways to store information and new alternatives such needs arose; devices with greater capacity, better benefits. Appeared optical storage devices that enable the precise location recording and laser beams.

The main optical storage devices are:

CD ROM (CD R) .- Disc Read Only MemoryCD Compaq RW Recordable Disc .- Compaq-WritableDVD R. - Digital Video Disc or Digital Versatile Disc Recordable Digital Video OnlyDVD .- RW Disc or Digital Versatile Disc Recordable-R DL WritableDVD .- Digital Video Disc or Digital Versatile Disc Recordable Double LayerBlu Only rayDisc .- Blue Ray-defined name of the laser beam (also known as BD) CD-ROM

Data Storage Cd, its contents can be read countless times but can not be modified or deleted once recorded.

CD RW

Optical storage cd can be recorded and clearing it again and again.

DVD-R

Storage DVD that holds the contents can not be modified or deleted.

DVD RW

Storage DVD that can be recorded and erased its content over and over again.

DVD RW DL

Storage DVD double layer can be recorded and clearing it again and again.

Blu-ray

It is an optical disc format new generation of 12 cm in diameter (same as CD and DVD) is used for high-definition video and high data storage density. The Laser available for writing and reading can achieve increased storage capacity over the DVD because the blue laser has a shorter wavelength laser used in traditional systems

Its storage capacity currently stands at 50 GB and 25 GB dual-layer to a layer.

Studies indicate that it has developed a Blu-ray format capable of storing 400 GB.

Note: There are previous types of features LightScribe disc (in Spanish "Laser Light Scripture) this variation is to have a layer used for the CD or DVD to label the front of the CD or DVD using Laser (record, capture, draw pictures, text or any kind of design. This technology was developed by HP and LiteOn.

It's easy to tell if my unit has this capability we can find the logo that identifies this feature in our unit and make the most, only Basque buy the CD or DVD with this layer and learn a small software that allows you to adjust the device design and does the rest.

USB Memory Storage or "Pendrives"

Created by IBM in 1998 to replace floppy disks in IBM Think Pad, the memory sticks (also called Flash Drive Memory Pen) operate under the Standard USB Mass Storage (Mass Storage USB-Universal Serial Bus). The current use Pendrive USB 2.0 standard, with a transfer of up to 480 Megabit / s, although in practice work to 160 Megabit / s.

They are basically composed by:

- A male USB connector, a USB controller that incorporates a RISC micro mini small RAM and ROM-One or more flash memory chips A to 12 Megahertz crystal oscillator to control data output stream. Compared to floppy disks, CDs, DVDs have great advantages such as speed, exposure to dust, scratches, shock, humidity, etc..

This type of popular storage devices can be found in various capacities, designs, colors and styles.

Memory Card Storage

Secure Digital (SD)

Based on the type flash memory, but unlike the memory sticks, with no drivers, so readers need to function units, with various storage capacities Mb to Gb, are the most used. They are also faster than MMC and have a secure write protection on the side.

TransFlash and Micro Cellular telephony SDUs. Adapter to be inserted into the card reader on your computer

Compact Flash (CF), Multimedia Card (MMC), Smart Media (SM), Extreme Digital Picture Card (XD)

With multiple capabilities and often used in digital devices such as video cameras, some digital cameras or other portable media, typical of some manufacturers Olympus and Fujitsu, with a capacity of up to.

ZIP storage - Superdisk

SuperDisk Drive

It is the trade name of the disk and the disk drive company using technology Imation LS-120 (LS LAserServo), this technology allows a special disk 3 "can store up to 120 MB (83 discs 1.44 MB) while the SuperDisk Drive supports the use of discs 3 and a half inch 720 KB and 1.44 MB but with a superior in speed read / write drive that common, this drive is connected externally.

Iomega Zip

The commercial name of the company Iomega device. This device has really gained acceptance because of its size, light weight and easy installation (parallel port connection and appreciation for special handling) make it ideal as a mobile unit, in addition to his records of only one pound formats are available in 25 MB and 100 MB (70 disks 1.44 MB), these discs are a bit larger and thicker than a disc of 3 "but they are very easy to transport.

Storage and other MP3 players

Mp3, Mp4

A digital audio player is a device that stores, organizes and plays digital audio files. Commonly referred to as MP3 player, MP3 player, or just MP3 music format by reproducing, these have a memory and a USB connection often means making it possible to be used as storage units also exist in the market various capacities, designs, styles and sizes.

Cell Phones.

Being one of the most used media today, they also incorporate small micro SD and M2 memory that stores images, audio and video and of course the ability to save data even if not its main purpose, but have adapters memory that allow the computer to read and write about them.

This concludes this a little long by the way, I did not split into parts because it is an important issue and it is best to take a look from start to finish, if you get here I hope you learned a lot, that's the purpose This blog, the information as always is small compared to the world of computers, some things I might have missed, forgotten so many other terms that are relating to previous and subsequent post we'll play later, you are now able to do a better choice knowing a little about the storage capacity and the means available in the market for this purpose.

I appreciate your patience and have accompanied me here.

I hope your company in the next issue that I'm putting that follows knowledge of the 2 previous post and this.

So long and thanks a million

By the way if you wonder why more days later than normal at the end of this topic is because I remembered that I like the development of web pages that they walked in, developing a website for a client, give them a visit and give me your opinion www.caballerotrucking . com.mx

CLARIFICATION.

All trademarks mentioned are used as reference only the order of occurrence, description and photographs indicate no preference and are trademarks of their respective manufacturers. The images are used as reference and were taken from the web, except the comparison tables that were recaptured to make it look according to the presentation I wanted to achieve. If there is any restriction in this regard please notify so delete the post.

Carlos Olvera

Systems analyst

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