Samsung HARD DISK DRIVE Service Manual page 25

SAMSUNG HARD DISK DRIVE
Abbreviation of pivot bearing, Mediator of Arm and Base which is located in the center of ARM
BEARING
and it can rotate smoothly.
Bezel A plastic panel that extends the face of a drive so that it covers a computer's drive bay opening.
BIOS Basic Input/Output system: Control program/sub-program can control computer and around device.
bit A binary digit may have one of two values-1 or 0
Located in the first track and sector in disk where store physical structure information of disk.
Boot Record
(sector1, track 0, side 0)
Abbreviation of Bit Per Inch, it means the recording density towards circumference. Generally it
BPI
decided to the value of maximum track.
BPS Bit per second. Data transferring speed, transferring bit numbers per second.
BPSI Bits per square inch = areal density, Bit numbers per 1 square inch, BPSI=BPI x TPI
Breather
Filter to prevent contamination occurred inside due to outside air, it is putted on air plug.
Filter
Temporary RAM to store data between HDD and host computer, it is used for efficiency
Buffer
improvement.
Burn-in test Reliability test with changing temperature, voltage condition.
Bus The part of a chip, circuit board, or interface designed to.
Byte Unit of digital information. 1 Byte is 8 bit.
Optimizing method for drive efficiency, read cache is for data transfer from drive to host
Cache computer and write cache is from host to drive. (256KB in normal. It mediate the bottle-neck
due to speed difference between drive and PC host)
Capacity Information amount could be stored in HDD. Units are MB, GB
Clean Room No particle room for MP or RMA of HDD. Grade of 1000ppm, 100ppm, 10ppm etc.
CLIP-FPC Components to assemble FPC and SUPPORT-FPC.
Clock Timing standard signal to treatment balance.
The logical factor to read/write real data. One cluster is bind 2 sectors generally, its size is
Cluster
2kbyte.
Compatibility
Test hardware device or software's compatibility to confirm compatibility.
test
Controller Disk Controller also, chip or circuit can be transfer data order of computer to available to HDD.
Protect parts within HDD from the exterior impact and particle and moist ,the fatal fact caused
Cover
head and disk failure.
Central Processing Unit. Control input/output device and sending, computing,recording data and
CPU
output the result.
Protect activator's impact in emergency condition when head move to parking zone or come off
Crash Stop
data zone.
Abbreviation of Cyclic Redundancy Code, detect error differ from ECC containing error correcting
CRC
function. For protect ID data.
VANGO(VL40)
D