General question about memory on a computer? Read details for giving accurate answer?
Topic: Write about a memory essay example
June 26, 2019 / By Meredith Question:
I am curious to know something. I have heard that with time things become overwritten and irretrivable on a computer, but that takes months, i have also heard that there are programs that speed up this process, and also make them irrtreavable. Now in your computer there are files called temporary internet files, now when these become erased do they go into their own section (as some would call it) in the hard drive, or would these go in with all the erased images that were once on your desktop? If so( that they are put in thier own place) where would they go? i find it hard to belive that a computer would differenciate internet images and just regular images once they are erased. Basicly i would like you memebers of yahoo answers to answer my question like if you were revising an essay. Correct the things i have said and or add details to what i have asked.
i also wanted to add that if you are planning to advise a program that does a guttman or what is called a secure deletion, dont advice me something that does this long process (35 passes) in like five seconds or minutes. Like ccleaner. In my opioun thats program is a big fat scam!!, ive tried it does not help. Also how would i know that a secure deletion file is actually working? would it be a good idea to download a restoreing program to see if it is really securley deleted??? Im just stretching my legs in computer knowledge.( curious and wanting to know more about computers) thank you for all your answers:)
Best Answers: General question about memory on a computer? Read details for giving accurate answer?
Leona | 2 days ago
Regardless of where your files are located, you basically never actually delete anything. There is a file called the master file table (MFT). This stores the address of each of your files. the address is actually the location on your hard disk where your file is located (like a house number on a street). When you delete anything, all you actually delete is the file's address in the MFT. The file itself is still there on your hard disk, the computer's operating system just doesn't know it's there anymore. this is why recovery programs can find these files, they just scan for files on the hard disk without looking at the MFT. When your computer needs to write new files, it will eventually re-use the space that your old file was in. file shredders write 1s and 0s in various patterns on top of your old file to overwrite it. To completely erase a file you'd need to overwrite it around seven times in an alternating 10 and 01 pattern. To completely erase, for example, a 250gb hard disk, it would take something like 24 hours to complete (thats just a educated guess). You can test the effectiveness of your shredder by useing a good recovery program to find and recover the file. If it can't find it, it worked.
The forensics people can use tunnelling electron microscopes to recover data from virtually any disk unless it's platters' surfaces have been completely destroyed.
If it's internet related though, the police will just go to your isp for your records and can't erase THEIR computers.
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We found more questions related to the topic: Write about a memory essay example
Originally Answered: Serious question! Please answer I need help (read details)?
Don't harm yourself or throw your life away. You said you haven't been able to go through with suicide, so you probably know deep down that there's something in your life or some hope/dream for your life that is worth living for. Don't give up. It might help you feel better now if you find something to commit yourself to, such as a job, hobby, sport, volunteer opportunities, etc. personally I'd recommend volunteering, helping others might help you find more of a purpose or passion to dedicate yourself to and distract yourself from any problems. Also, maybe try talking to your doctor again and explain how your feeling and how the Zoloft hasnt been helping you. You might also want to ask your doc if they could arrange for an appointment where you, your mom, and your doc all sit down together to talk. It could be a good opportunity for you to express your feelings to your mom without it turning into an argument since your doc would be mediating the talk to make sure you could fully express yourself. (If your docs not a psychologist/psychiatrist, it might be good to get one for this talk). And if this doesn't work, there's always hotlines to call where you can talk to someone for free (maybe try a teen suicide hotline). I hope you're able to get past this stage in your life, and I hope you find something that makes you feel good again :) and btw life gets better (maybe not right away but it does) and it is what you make it. Try to make it good:) good luck Faith
Ok, here is today's essay on Hard Drive storage.. ;)
When you store information (files) the computer consults an index that tells it where some free storage is. Think of it like a card catalog in a library. Now, when you delete a file the computer just goes to the index and 'removes' it's entry, and returns that space back to the 'free to use' pool. So, the file is still there, there is just no simple way to get to it. Now, as you said, eventually that space will get used by something else.
There are utility programs that not only delete the index 'card' they go to the book on the shelf and shred it. Some of these only work when you 'actively' delete a file. This is not what happens with 'Temporary Internet files'. They act like files, and will be overwritten, they are special in that they are mostly invisable, and all of them are written to a 'cache', a pre-set in size area (it's in the options).
So, why do they exist? Well, if most of a web page is static, having that information 'cached' make surfing faster, and faster surfing is better, yes?
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Ok first a file is a file as in a collection of bits written in small areas of the disk called sectors. There is no difference between temp files and any other file other than how you use it. See the web site below for more details.
When a file is written it is written in consecutive sectors until done. After some time when you delete and create files there are empty holes that get filled up by new files that you create.
When a file is deleted the only thing deleted is the directory entries that point to the sectors that contain the files. The data is not erased. Kinda like blacking out entries in the table of contents in a book without taking out the pages that the table of contents point to. What security erasers do is find these sectors that are not used and overwrite them with a random bit pattern.
When you move files from one directory to another such as from My Documents to Trash the only thing that changes is the directory or table of contents entry. The data is not physically moved.
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Ok, first. A point about terms. When you speak of "Memory" usually that refers to RAM. What you are talking about is space on your hard drive.
The operating system on your computer (DOS in fact) is in charge of organizing the storage of information on your hard drive. It keeps a list of what the file name is, any flags (Hidden, Archive, etc) And what tracks/sectors are used by the file. So the computer always knows what track/sectors are available for use. Now, when you delete a file, all it really does is trash the file name in the listing (to put it simply). It doesn't actually erase the file itself. However it will mark the tracks/sectors for that file as free and available for future use. Which is why you can undelete a file as long as you haven't stored anything else on the drive. The new information may have written data to the areas previously occupied by the deleted file. So as a result, a drive after much use is always full of bits and pieces of old deleted files. As a security measure, there are programs that will, when you delete a file, automatically write garbage data (like all zeros) to all the locations that the deleted file occupied. So a file undelete won't work. Now there are ways (for people like the FBI or NSA) to still get the deleted information. To increase the security some programs will write that garbage data a number of times, which makes it increasingly hard to retrieve the old data.
It doesn't matter what kind of file it was (like temp internet files) the operating system treats them all the same when they are deleted. There is no "special" section for that type of file. The only files that get any special attention are the files for the operating system. They reside in a special location on the hard drive. This is necessary for the proper operation of the disk system and the computer.
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Another answerer is correct about the file data not being erased, just reclassified as available space. Temporary files are no different than any other file and are treated the same. Internet explorer allocates a specified amount of space for them(under Internet options) but only for the purpose of caching the names for quick retrieval. Other than that, they are written to the disk just like any other file.
As far as secure deletion it really depends on how badly someone wants to try and retrieve something. Even though part of a file is written over, there will be fragments, bits and pieces left behind. How? Disks are divided up into areas called blocks. For example, you save a file that is 472kb in size. Your drive uses blocks that are 512kb each. The remainder of available space after your file is saved will be left as is because it's less than a block so if there where something there before, it will still be there. Hope that makes sense.....
Defragmenting regularly increases the likelyhood of complete overwritting but if you have sensitive data you will have to use something like spybot's shredder to completely get rid of it.
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Originally Answered: Computer Question , My memory says memory could not be written?
There are two things you need to do:
First, run scandisk. Click START, then PROGRAMS, then ACCESSORIES, then SYSTEM TOOLS, and select SCANDISK. Let it run.
Second, run disk defragmenter. Click START, then PROGRAMS, then ACCESSORIES, then SYSTEM TOOLS, and select DISK DEFRAGMENTER. Select it to run on all drives. It may take quite a while to run.
After those two things are done, double click the MY COMPUTER icon that's on the desktop. Right-click the C: drive and choose PROPERTIES. A map will show up that tells you how much free space you have. If there isn't any free space, you need to have someone help you decide what to delete to make more space. Don't just start deleting stuff without help, though.
Have the person you're getting to help you take a look at your SWAP FILE size, and help you make it larger if it's been set too small. The inability to write memory is usually because the swap file isn't big enough.