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Why accessing of data in magnetic tape is slower than hard disk?
Wiki User
∙ 8y ago
- tape : seek time for a record requires moving the tape through the drive until the record's location is found, average seek time will be half the time needed to move the entire tape through the drive; a tape that takes 10 minutes to move all the way through the drive will have an average seek time of 5 minutes.
- disk : seek time for a record requires stepping to the track that holds the record then waiting no more than one disk rotation for the record, average seek time is the sum of the time to step halfway across the disk and the time for the disk to make half a rotation; a disk with 1000 tracks with a 2 ms step time that rotates 100 times per second (10 ms per rotation) has an average seek time of 500 * 2 ms + 5 ms = 1005 ms = 1.005 seconds
The above given numbers are for illustration only and do not correspond to any specific real device,
Wiki User
∙ 8y ago
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What is the difference between an optical and a magnetic disk?
A magnetic disk is a disk which stores information magnetically, and is read/written with a small magnetic head (e.g. a hard disk)An optical disk is a disk which stores information optically, usually as a series of pits and peaks, and is read/writMagnetic Storagea) Stores data in magnetic form & it doesn't use laser to read/write datab) It is affected by magnetic field.c) It has high storage capacity.d) Data accessing is high as compared to CD's and DVD's.e) Magnetic storage devices are ; Hard disk , Floppydisk, Magnetic tape etc.Optical Storagea) Stores data optically & uses laser to read/write.b) It is not affected by magnetic field.c) It has less storage than hard disk.d) Data accessing is high as compared to floppy.e) Optical storage devices are ; CD-ROM,CD-R,CD-RW, DVD etc.
Accessing disk storage is slower than accessing RAM by an order of?
RAM is 100 Thousand Times Faster than Disk for Database Access
What are the limitations of optical disk?
(a)- it is a read-only storage medium. Data once recorded, cannot be erased, and hence the optical disk cannot be reused. (b)- thd data access speed for optical disk is slower than magnetic disks; (c)- optical disk require a more complicated drive mechanism that magnetic disk.
When accessing a disk the amount of data transferred is?
If you are using the word "assessing" to read a disk then the amount of data you can transfer to the disk (write) is the remaining available free space on the disk. On the other side of the coin, the amount of data to can extract (cut) is the amount of data that is stored on the disk.
What is the round magnetic plate on which data can be encoded?
A Disk
WhenThe largest delay in accessing data on disk is due to?
T
What is a small plastic magnetic disk used to store data?
Its called a floppy disk.
Is floppy disk considered magnetic media?
In a way, yes. The material that makes up the "disk" in a floppy is Mylar, a magnetic substance. Data is stored on the Mylar disk in the form of magnetic charges.
Is a hard disk a magnetic device that stores data?
Yes
What is the difference-between reading and writing a disk?
Reading a disk involves accessing and retrieving data that is already stored on the disk, while writing to a disk involves adding new data or modifying existing data on the disk. Reading does not change the content of the disk, whereas writing alters the information stored on the disk.
What is floppy disk storage methods?
Floppy disks use magnetic disk to store the data.
Reading data is performed in magnetic disk by?
Read/Write Heads
