Disk driver, also called disk drive, is a storage machine recording information with hard disk.
Disk driver reads data from disk and then passes them to the processor.
It includes floppy disk drive, hard disk drive,CD-ROMdrive and so on.
Structure
Disk driver is composed of head, disk, read/write circuit, mechanical servo gear and so on.
It was first introduced in Model 305 RAMAC by IBM in 1956.
Therefore, it is considered to be not only an input rig but also an output rig.
Types
Disk driver is one part of computer disk storage.
It is divided into hard drive, floppy disk drive and optical drive.
Disk Drive Failure Recovery
Hard drive is an important medium for storing information.
The following content is failure analysis except virus for people to refer:
(1).
(2).
The problem of this kind of failure must lies in partition table.
Of course, the second way is much more complicated.
(3).
Error Loading Operating System
Such failures are prompted when there is an error in reading partition boot sector.
After INT 13H fails to read disk, the error will be prompted.
Secondly, track mark and sector ID of track where partitionboot sectorlies, are broken down.
So, the specified sector cant be found.
Thirdly, drive fails to read circuit.
This situation is rare.
Most errors are random, because system boot can perform.
This at least tells us that a master boot sector has been correctly read out.
(4).
Cant Enter the System.
If floppy drive exists, it boots from drive A.
This belongs to hardware failure.
Thirdly, reading disk doesnt have error, but read-out suffix of MBR isnt 55AA.
System determines that MBR is incorrect.
This belongs to soft fault.
(5).
Such failures mostly belong to software failure.
If BPB table is intact, simple SYS C: is needed to transmit system on the boot drive.
If this also fails, then it shows:Disk Boot Failure.
(6).
NO ROM BASIC
SYSTEM HALT
This prompt always appears in very old machines.
System can only perform INT 188H and call the cured BASIC program.
If cured BASIC program doesnt exist, this will cause crashes.
(7).
This makes system crash when it is executing this document.
The prompt on the screen shows Starting MS DOS…… and then crashes.
This fault is very simple.
But because there is no oops message, most people will easily mistake it for a system file corruption.
When this happens, if system files are intact, you’re able to take down these files.
(8).
This means that MBR needs to ensure whether there is only one active partition.
(9).
So, it asks users to enter the correct path and file name.
it’s possible for you to enter C:\DOS\COMMAND.COM under the prompt.
(10).
BPB table is a logical address used by DOS to read and write hard disk.
DOS can convert this logical address to physical address.
Once it is damaged, DOS cant carry out operations on hard disk.
Checking sequence is as follows: master boot program partition boot program hidden files in DOS CON-FIG.SYS AUTOEXEC.BAT.
If drive C: can normally read and write, BPB table must be intact.
Readers can restore boot system according to the above ways or by other suitable tools.
(11).
17XX Hard Disk Error
HDC controller fail
Such failure belongs to hardware failure.
The reason for this may be that the controller is damaged or the cable is not connected well.
The controller failure is relevant to the parameter prefs of hard disk.
