The main reason for the discontinuation of semi conductor based storage devices for providing large storage space is _________
Explanation: In case of semi conductor based memory technology, we get speed but the increase in the integration of various devices the cost is high.
The digital information is stored on the hard disk by ____________
Explanation: The digital data is sorted on the magnetized discs by magnetizing the areas.
For the synchronization of the read head, we make use of a _______
Explanation: The clock makes it easy to distinguish between different values red by head.
On of the most widely used schemes of encoding used is _________
Explanation: The Manchester encoding used is also called as phase encoding and it is used to encode both clock and data.
The drawback of Manchester encoding is _________
Explanation: The space required to represent each bit must be large enough to accommodate two changes in magnetization.
The read/write heads must be near to disk surfaces for better storage.
Explanation: By maintaining the heads near to the surface greater bit densities can be achieved.
_____ pushes the heads away from the surface as they rotate at their standard rates.
Explanation: Due to the speed of rotation of the discs air pressure develops in the hard disk.
The air pressure can be countered by putting ______ in the head-disc surface arrangement.
Explanation: The spring mechanism pushes the head along the surface to reduce the air pressure effect.
The method of placing the heads and the discs in an air tight environment is called as ______
Explanation: The Disks and the heads operate faster due to the absence of the dust particles.
A hard disk with 20 surfaces will have _____ heads.
Explanation: Each surface will have its own head to perform read/write operation
The disk system consists of which of the following:
ii. Disk drive
iii. Disk controller
The set of corresponding tracks on all surfaces of a stack of disks form a ______
Explanation: The data is stored in the these sections called as cylinders.
The data can be accessed from the disk using _________
The read and write operations usually start at ______ of the sector.
Explanation: The heads read and write data from the ends to the center.
To distinguish between two sectors we make use of ________
Explanation: This means that we leave a little gap between each sectors to differentiate between them.
The _____ process divides the disk into sectors and tracks.
Explanation: The formatting process deletes the data present and does the creation of sectors and tracks.
The access time is composed of __________
Explanation: The seek time refers to the time required to move the head to the required disk.
The disk drive is connected to the system by using the _____
_______ is used to deal with the difference in the transfer rates between the drive and the bus.
Explanation: The buffers are added to store the data from the fast device and to send it to the slower device at its rate.
_______ is used to detect and correct the errors that may occur during data transfers.
Explanation: ECC stands for Error Correcting Code.