21⟩ What is Circuit failure?
The hard disk become inoperable if any of its circuitry malfunctions.
Hard Drive (HD)
Home Computer Hardware Hard Drive (HD)
“Hard Disk (HD) Frequently Asked Questions in various Hard Drive (HD) Interviews asked by the interviewer. So learn Hard Disk (HD) with the help of this Hard Drive (HD) Interview questions and answers guide and feel free to comment as your suggestions, questions and answers on any Hard Drive (HD) Interview Question or answer by the comment feature available on the page.”
27 Hard Drive (HD) Questions And Answers
22⟩ What is Stiction?
Sometimes the head of the disk is not able to take off, it tends to stick to its position. This phenomenon is known as stiction.
23⟩ Explain power consumption statistics of the hard disks?
★ These days power consumption of electrical devices has become a prime importance as portability and performance greatly depends on a devices consumption.
★ Power consumption of a hard disk directly affects: Drive age, disk failure rates, temperatures etc.
★ Smaller drives consume less energy as compared to large drives. The disks consume maximum energy during starting up, also known as spin up.
★ Spin up and spin down is directly controlled by the SCSI controller on such drives.
24⟩ Explain the different ways of hard drive failure?
A hard drive may fail due to multiple reasons. Some of the common causes are:
★ Head Crash
★ Bad Sector
★ Stiction
★ Circuit failure
★ Bearing and motor failure
25⟩ What is Head Crash?
This is caused when the read / write head comes in contact with the platter. This can cause the area where it has come in contact to lose data.
26⟩ Explain Landing zones and their technologies?
★ When a hard disk is functioning normally the read write head simply fly`s over the platter without making any contact.
★ These days to prevent the head from touching the platter the head are physically moved ( parked) to special areas also known as landing zones to prevent data loss.
★ The landing zones are usually areas where no data is stored.
★ Another approach is to leave the heads suspended in air so that they never come in contact with the platter surface.
★ In legacy devices the heads could not be automatically landed and in order to prevent them from touching the platter the user had to run programs manually to park the heads.
27⟩ What is Bad Sectors?
The platter in a hard drive is split into minute areas known as sectors. Sometime certain sectors might become faulty, this does not affect the entire drive.
