why data storage technology ?
928193
if i understood ur question right, because we can store more and more data in a smaller physical space or device. like the nanotube technology for example.
143421
if you want disk space, you need a larger hard drive... memory is not space.
140741
Hopefully the Y2K "concern" forced us to look more to the future in regards to programming and data storage. I think all developments now are just building and improving on previous designs and processes, so there should be greater adaptability.
931101
Computer disks store data as reversals of magnetic field in the coatings on the disk.  It's like a tape recording laid out on a flat surface.\n\nTherefore, a magnet can flip the field and erase the data.
449905
Your question relates to how data is stored on disks in computer systems.   The software which controls this is called a file system.\n\nThe physical disk is divided into a large number of areas usually called sectors or blocks.   (Sometimes, a file system treats several sectors together as one logical "block").  A block is the amount of data which is written to or read from the disk at once.  It's also the unit in which space is allocated on the disk to individual files.\n\nBlock level access to a disk means that the program using that kind of access can read or write individual blocks on the disk.   When this is done, there is no file system providing protection or management of the space.   File access means that the file system software is used, and the program is oblivious to the blocks, and refers to data in terms of files.  In this case (which is the more common, by far), the file system worries about figuring out and controlling which blocks are used to store each file on the disk.\n\nTo summarize, block level access provides no protection and no bookkeeping of where things are.  File access lets the progra treat the disk at a higher, more logical, level and ignore the physical aspects.
993366
it's an obsolete form of high density data storage used in banking and finance. data drives a film exposure process. when the film is developed it is readable with a magnifying device. data frames are indexed and may be located and retrieved by machine that locates and loads film spools arranged in racks.
255903
Modern computing technologies help to automate the accumulation of huge amounts of data. For eg. with ERP and CRM systems one can collect vast amounts of information about customers.\n\nHowever, due to the sheer amount of data, the humans cannot get any "useful" information out of it. For that purpose, we need data mining -- it supports decision making process of the business organization.\n\nConsider an example: A company wants has plans launch an expensive beauty product. It has past data about shopping patterns of its customers (let's say, five thousand customers). It wants to know how many customers buy expensive things regularly and out of these how many buy beauty products regularly. If humans are deployed to go through five thousand records, they will take too much of time and in all probability, produce inaccurate results due to human errors. A data mining software will automate the job and provide accurate results.
217488
It errases all your data in your hard drive and brings your hard drive back to how you bought it. Once you format the drive its hard to get back the formatted data! But you do get softwares for that or you have professional companies, but it comes with a price!
669774
Smaller drives tend to be faster than similar age and technology larger drives.  \n\nFor example, 15K SCSI 146GB hard drives will be used for applications that require fastest access (Exchange, Database, etc), while the big 300-500GB 10K SCSI drives are used for mid-line storage (CIFS, NFS, general file storage).  The 146GB drives require less seek times and have longer MTBF rates.\n\nReally big drives in less robust technologies (SATA, PATA, IDE) can be used in either RAID or JBOD arrays for near line storage (snapshots, backup staging, archival space, etc).  \n\n$ is proportional first to speed, then to size.
1154893
Its what you just added in your additional comment....it doesnt have common sense, but we do. Well, some of us do anyway =) \n\nComputers are a man-made machine and it only does things that the human programs it to do, but in a more efficient and faster way. If we train it to do mathematical things, it will solve it for us faster. If we want it to store huge amount of data, it will do it for us.\n\nHowever, they do not have common sense. We cant teach it to think morally or ethically. It just does what we tell it to do. They will never experience human emotions or concepts...it will only provide us the foundation and software to allow us to enter them into its system, but they will not process it like humans do.\n\nIts limitations is how much data we put into it. How much memory it has. Its life expectancy is how long the hardware survives. They get replaced easily because as the years passes, the technology and components get better. \n\nTheir limitations is how we built them.
1138120
Storage, process, speed, accuracy...humans can't match.
656173
Computer processors require memory for intermediate results, for output storage, etc. And input data is generally found in memory as well. \n\nThings will go faster if these data can be made available instantly on read, or output instantly on write. This is not possible in real world equipment. Some early computers used drums or disks for all sotrage and whenever the CPU needed some data, there was a wait for rotation to bring it under the read heads. And similarly on output. This is a very slow scheme, so faster (but smaller) memory was designed and built. Core memory used lots of little magnetic donuts threaded with wires, semiconductor memory uses transistor structures on ICs. \n\nBut this is slower than ideal as well, at least for adequate amounts of affordable memory. So nearly all CPUs have register memory (very small amounts of very very fast memory) on the chip. There may be as much as 16 (or 32) of these registers, each perhaps 32 bits wide. This is not much memory at all in practice, regardless of how useful. \n\nSo many computers include an intermediate speed memory type. It's called cache memory (from the French) and, if properly done, can speed up processing quite considerably. If poorly done, it can be (literally) a waste of time. Today, cache memory is always made from expensive (and often power hungry)  transistor circuits, which are, in compensation, much faster than ordinary (ie, cheaper) semiconductor memory. \n\nAnd cache memory requires sepcial arrangements. If data is found in the cache, it can be read much more quickly (and generally written mcuh more quickly too) than ordinary RAM, and vastly more quickly than any mechanical mass storage. There must be arrangemetns to keep track of what's in the cache memory so it can be read from there rather than from slower storage, and whether or not changes have been  made to some cache data, so the changed data can be transferred to less expensive, and less heavily used, memory. Cache design, and cache management issues, are an arcane but often very profitable part of computer design. \n\nIn recent years, much cache memory has been built onto chip dies as 'part' of the CPU. This cache is faster than any off chip cache could be, but is quite expensive. This has led to computers with several layers of cache memory. On-chip cache (small amounts, but very fast), level 2 cache (larger affordable amounts, not so fast), level 3 cache (also on the motherboard, much more affordable, and slower still), and so on.
155470
USB External hard drives are very affordable and have the advantage of being portable. Another alternative is copying your data to a DVD(s). Then store them offsite in case of a fire or other disaster.
385988
they are electronic device that acepts data proccess it and store it for future use and a device which helps solve problems easier to meet human needs
700655
i handle procurement of computers for our company.  since last year all our new computers don't have floppy drives anymore.  what we did is to issue thumb drives or  flash drives to our employees.  the reason for the switch is thumb drives are more durable than floppy disk and they are impervious to a magnetic field.  you can't say the same w/ a floppy.  just run a magnet over a floppy the the data will be trash.  thumb drives are easier to carry & they hold a lot more data than floppies.  you can't even squeeze an ave. mp3 file in a floppy.\n\nfloppies are dead.  its time you also switch.
40398
It's because of an age old trick used in computing to spead up the perceived speed of reading and writing to memory devices.  \n\nInstead of writing directly to the storage media (in which the speed of the device becomes a bottleneck), an operating system would write to a spare 'patch' of memory called a cache.  The cache would then dump its contents to the storage device when (for example) there has been a long enough period of inactivity.\n\nA problem would arise if you ejected the media before the cache had not finished writing to the device.  If this happened, then you would not actually have the files on your media that you thought you had saved ... or they may be corrupted due to only being partially written.\n\nWith the "remove safely" feature, the cache is instructed to empty itself and complete the writing of any information to the device.  The operating system in your particular case also checks that no applications are using any files on that storage device.\n\nSo, it really is in your best interests to "remove safely" as USB memory device.  The only exception might be if you had only been using the device to read from (no writing of files) ... but that's your risk.\n\nAll the best.\n\nSnoggeramus.
222222
An external hard drive is for data storage, but is not contained in the computer case.  It is connected to the computer by plugging into a port on the outside of the case.  The advantage is that it is portable and can be unplugged and carried with you and plugged in another computer that can also store and retrive data from the drive.