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Hard Disk Drives
In a personal computer, a hard disk drive controls the positioning, reading, and writing of the hard disk, where data is stored.
4,496 Questions
External hard drives can use data from an internal hard drive as often as you'd like. To do this, you must have backup software installed on each drive that will allow you to back up the drive when necessary, even if you are not in front of your computer.
How many maga bites are there in one giga bite?
there are 1024 megabites in a gigabite, but a lot of the time, people just say 1000 to make it more easy to calculate stuff
Does the hard drive lose its data when power is removed?
Random Access memory (RAM). It only holds data while the computer is powered up.
What is The correct boot sequence on the computer?
System Boot Sequence
The system
BIOS is what starts the computer running when you turn it on. The following are the steps that a typical boot sequence involves. Of course this will vary by the manufacturer of your hardware, BIOS, etc., and especially by what peripherals you have in the PC. Here is what generally happens when you turn on your system power:
- The internal power supply turns on and initializes. The power supply takes some time until it can generate reliable power for the rest of the computer, and having it turn on prematurely could potentially lead to damage. Therefore, the chipset will generate a reset signal to the processor (the same as if you held the reset button down for a while on your case) until it receives the Power Good signal from the power supply.
- When the reset button is released, the processor will be ready to start executing. When the processor first starts up, it is suffering from amnesia; there is nothing at all in the memory to execute. Of course processor makers know this will happen, so they pre-program the processor to always look at the same place in the system BIOS ROM for the start of the BIOS boot program. This is normally location FFFF0h, right at the end of the system memory. They put it there so that the size of the ROM can be changed without creating compatibility problems. Since there are only 16 bytes left from there to the end of conventional memory, this location just contains a "jump" instruction telling the processor where to go to find the real BIOS startup program.
- The BIOS performs the power-on self test (POST). If there are any fatal errors, the boot process stops. POST beep codes can be found in this area of the Troubleshooting Expert.
- The BIOS looks for the video card. In particular, it looks for the video card's built in BIOS program and runs it. This BIOS is normally found at location C000h in memory. The system BIOS executes the video card BIOS, which initializes the video card. Most modern cards will display information on the screen about the video card. (This is why on a modern PC you usually see something on the screen about the video card before you see the messages from the system BIOS itself).
- The BIOS then looks for other devices' ROMs to see if any of them have BIOSes. Normally, the IDE/ATA hard disk BIOS will be found at C8000h and executed. If any other device BIOSes are found, they are executed as well.
- The BIOS displays its startup screen.
- The BIOS does more tests on the system, including the memory count-up test which you see on the screen. The BIOS will generally display a text error message on the screen if it encounters an error at this point; these error messages and their explanations can be found in this part of the Troubleshooting Expert.
- The BIOS performs a "system inventory" of sorts, doing more tests to determine what sort of hardware is in the system. Modern BIOSes have many automatic settings and will determine memory timing (for example) based on what kind of memory it finds. Many BIOSes can also dynamically set hard drive parameters and access modes, and will determine these at roughly this time. Some will display a message on the screen for each drive they detect and configure this way. The BIOS will also now search for and label logical devices (COM and LPT ports).
- If the BIOS supports the Plug and Play standard, it will detect and configure Plug and Play devices at this time and display a message on the screen for each one it finds. See here for more details on how PnP detects devices and assigns resources.
- The BIOS will display a summary screen about your system's configuration. Checking this page of data can be helpful in diagnosing setup problems, although it can be hard to see because sometimes it flashes on the screen very quickly before scrolling off the top.
- The BIOS begins the search for a drive to boot from. Most modern BIOSes contain a setting that controls if the system should first try to boot from the floppy disk (A:) or first try the hard disk (C:). Some BIOSes will even let you boot from your CD-ROM drive or other devices, depending on the boot sequence BIOS setting.
- Having identified its target boot drive, the BIOS looks for boot information to start the operating system boot process. If it is searching a hard disk, it looks for a master boot record at cylinder 0, head 0, sector 1 (the first sector on the disk); if it is searching a floppy disk, it looks at the same address on the floppy disk for a volume boot sector.
- If it finds what it is looking for, the BIOS starts the process of booting the operating system, using the information in the boot sector. At this point, the code in the boot sector takes over from the BIOS. The DOS boot process is described in detail here. If the first device that the system tries (floppy, hard disk, etc.) is not found, the BIOS will then try the next device in the boot sequence, and continue until it finds a bootable device.
- If no boot device at all can be found, the system will normally display an error message and then freeze up the system. What the error message is depends entirely on the BIOS, and can be anything from the rather clear "No boot device available" to the very cryptic "NO ROM BASIC - SYSTEM HALTED". This will also happen if you have a bootable hard disk partition but forget to set it active.
This process is called a "cold boot" (since the machine was off, or cold, when it started). A "warm boot" is the same thing except it occurs when the machine is rebooted using {Ctrl}+{Alt}+{Delete} or similar. In this case the POST is skipped and the boot process continues roughly at step 8 above.
Why pen drive shows 3.72 GB instead of 4 GB?
If you look at your properties of the pen drive it wil say:
4.001.333.248 bytes this equals 3,72 GB.
Which is greater 750 GB hard drive or 1 TB hard drive?
A 1TB drive has aprox. 1000GB of memory. So 1TB has 250GB more memory than any 750GB drive.
Can i upgrade my hp 530 notebook's CPU processor graphic card and hard drive?
yes if you have a celeron CPU you can upgrade to highter rated celeron's but to a max of 667mhz bus speeds. as for c2d CPU's again providing you keep with the 667mhz bus range the sky is the limit ! mine was a t2700 which i upgraded to a t7600 ! i have also upgraded my memory from 1gig 800mhz to 4gig 800mhz bios sees new CPU and memory correctly and set them correctly
What is the largest partition than can be created on a drive with FAT16?
The original 16-bit version of the FAT file system (FAT16) supported hard disk partitions up to 4GB and files as large as 2GB.
Is a hard disk usually a A B C or D drive?
Both letters are for Hard Disk drive because one hard disc is compartmentalized and these are named C drive, D drive & E Drive etc.
Why is hard disk is popular than floppy disk?
Hard disk is more popular than floppy disk because hard disk can store huge amount of data in term of mega byte to giga byte. It stores the data safely compared to floppy disk. External hard disk are portable so they can transfer the data from one computer to another . But floppy disk has low capacity and are vey slow compared to hard disk . It can be easily damaged when exposed to heat and dust. Files can be easily corrupted and data transfer rate is slow compared to hard disk. Nowadays, computer are built without floppy drives which is needed to read floppy disks.
Do ps4s come with a hard drive?
No, that is why many people are complaining. You have to buy an external hardrive. (seperate)The best deal you can get is the sony PS Vita starter kit on playstation.com (it retails 34~ish dollars on amazon)
What are other drives are there besides floppydisk?
Computer drives can include:
- An internal hard drive
- Sometimes, a "slave" drive which is a second internal drive or a partition on the primary hard drive
External Drives consist of:
- floppy disk drive
- CD drive
- DVD drive (the CD/DVD are usually one drive)
- External Desk Drive - a unit that connects by USB Cable to the computer and acts as a secondary drive; often used for storage.
- A "thumb" or stick drive - inserts into a USB port and used for storage.
What is the difference between secondary storage and disk?
Depending on the model you are using, it depends on what you mean.
Typically, most models have primary storage as the Hard Drive (or now, Solid State drive may be as well), a type of nonvolatile storage whose data does not disappear if it is unplugged or loses power.
Secondary storage usually refers to things such as CDs, DVDs, Floppy, Zip, and Tape drives. However in some textbooks it may just mean a second HDD/SSD.
Tertiary storage pretty strictly refers to CDs, DVDs, etc.
How can we recover data from formated memorycard?
Deleting or formatting won't make the data in memory card erased permanently.
Those deleted data is still stored on the memory card, it's just invisible or inaccessible. Only the FAT or NFTS table is erased (the information about where those data were saved), but the real data are still intact there in sectors of the hard drive.
So as long as those data are not overwritten by new data, it's highly possible to recover them. And the MOST Effective way is to rely on some format recovery programs.
Note: before the data is recovered, never attempt to put more files to the disk. As saving more files may cause original data overwritten. Once overwritten, it's impossible to recover the lost items.
What speed can a hard disk store and access information?
it's either:
seek time,
computer virus,
data transfer rate,
rotational delay,
setting time,
magnetism,
rotational time,
seek delay
How many total partitions can a standard computer computer disk ide and sata?
Due to limitations imposed by DOS back in the '80s, ATA (the proper name for ide) and SATA drives can only hold 4 partitions. To work around this, extended partitions were invented. Extended partitions can hold 4 more partitions, any of which can be more extended partitions. Thus the number of partitions is effectively limited by the size of the disk. These limitations aren't imposed by the disk itself, rather the PC architecture. Intel macs, which don't need to maintain compatibility with DOS or old versions of windows use EFI, which allows for 128 primary partitions.
What is the largest storage capacity for a usb hard drive?
In the current market, there are usb hard drives that have a storage capacity of up to six terabytes (TB) of storage. In the future, it is possible that newer technology may surpass the storage capabilities of the present.
A read/write ____ is the mechanism that reads and writes items in the drive as it barely touches the disk's recording surface
Why would a computer be losing space in the hard drive?
If you are losing disk space constantly for no good reason, then you have a old type virus that a simple anti-virus scan will detect and remove Music and Video can chew up memory like nobody's business. Those files should be sorted through and non-used files deleted. The next big culprit is how your computer is saving files. If you haven't run a disk defragmenter before, now is the time. On a Window's based operating system, select Start Menu > Search > Files and Folders > type in "defrag". Then, when you see "Disk Defrafmenter" appear in the search terms, select it. Click on the "Analyze Disk" feature and in a minute you'll have a picture of how messy your disk drive is. Likely, your computer will reccommend that you proceed with the Defragmentation and you should start this process. The whole process should take 30-90 minutes. Upon completion, you should see a vast improvement in performance!
40 gigabytes=
40,000 megabytes=
40,000,000 kilobytes
They are terms used for how much data you can store on an item. One well known item is a camera.
GB= gigabytes
Is a hard drive a removable media?
Yes it is removable media. It can store all sorts of data, but can you remove it while the computer is still on? Yes, removable media is a part of a computer that can be removed while the computer is still running.
How long can a flash drive hold data?
It depends on how large the flash drive is, and how large the files are.
Take the size of the flash drive in GB, divide by the average size of the files in MB, and multiply by 1000.
So for example if you are storing photographs that are 2 MB in size on an 8 GB flash drive, you could store approximately 8 / 2 x 1000 = 4000 photos
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It also depends on the file structure in use. Most flash drives come pre-formatted with either FAT32 or exFAT - although most of them can be re-formatted to use other file structures. Both FAT32 and exFAT allow some flexibility in the size of the clusters used. Since storage is allocated by cluster - with enough clusters allocated to accommodate each file, the maximum number of files is also limited to the number of clusters.
As an example, theoretically if you had an 8 TB flash drive (wouldn't that be sweet) formatted with FAT32 using 32 KB clusters the maximum number of files would be 268,173,300. For smaller total capacity and/or larger cluster size, the number of files will diminish proportionately.
Can the FBI recover deleted files?
A normal delete does not actually delete a file, it just marks the hard drive space as available for later use. All the data are still there, and there are software programs that can bring it back more or less intact.
Even after a real deletion, or after the disk is reformatted, traces of magnetism remain on the hard drive, and with special equipment it is possible to read those traces and reconstruct what was there before deletion. This is true even after the deleted content has been overwritten once or twice.
It is not only FBI that can read deleted files, there are commercial companies that offer similar services, for example to businesses that accidentally reformatted the hard drive containing all their customer data.
Some programs offer a "safe delete" option which overwrites deleted files 20-30 times with random noise, to make sure that the data are really gone. This is now the standard option for emptying the waste basket in Mac OS X, for instance.
The drawback of "safe delete" is that it is much slower, especially if you delete a lot of data. And of course it means that even the companies that specialize in retrieving deleted data cannot help you if you accidentally delete something you shouldn't.
How old do you have to be to be able to drive?
18 years but in some countries it s 21 and in some it is 16.
