Samsung SP0211N Service Manual page 31

SAMSUNG HARD DISK DRIVE
LBA mode Logical block allocation. DOS mode to resolve 528MB capacity restriction.
LED Light Emitting Diode. Used for signal light to all kind of electric containing computer.
Low profile One of standard height of HDD, the real height is 1 inch.
Low-level Operating system make sector on disk enable to access in proper region in order to create file
formatting structure.
HDD become booting when put 2 more IDE drives. ( decided C:, Managed master/slave by
Master
Jumper control & CMOS setup)
When 2 IDE drives operated, one drive become Master(drive C: or drive 0) and the other is
Master/Slave Slave.(drive D: or drive 1) Master/Slave is determined by using jumper within drive or Cable
/Cable select method. jumper setup is different from companies,so refer to usages, Cable Select has a
select complex jumper method so drive become master/slave automatically according to decided signal
for Cable Select..
Media Plate substrate coating with magnetic body. Casting with lubricant to prevent damage for Head
Aluminium landing/off, where data stored in form of magnetic flux or politary change.
Mega
Data storage unit. Accurately 1,048,576 Bytes(1,024*1,024). that is 1,000KB
Byte(MB)
Mega
Clock speed unit for PC, clock occur million times per second
Hertz(MHz)
Microprocess
Collection of CPU function to LSI( large IC).
or
Read metal in gab head, Improved head has high valued inductance by inserting metal around
MIG
gab of core.
Millisecond One thousandth. Speed unit of HDD efficiency.
Multimedia Extension. Intel's new CPU chip. Added new 57 orders to run image and sound,
MMX
efficiency is improved about 10~20%.
MP Mass production.
MPC Multi-media Personal Computer
Magnetic Resistive head. For high-efficiency HDD, IBM developed the marginal head which is
MR head
enable to separate read/write applying MR elements to read head of thin film head.
MRB material review board.
Mean Time Between Failure, average time of occurring failure. This is one of most important
MTBF
reliability factor, not the actual measured value but the calculated value of every companies.
MTTF Mean Time to failure. same as MTBF
MTTR Mean Time To Repair, average time to repair. Generally the replacing time of PCBA or HDA.
Zone-Bit Recording, Constant Recording. While recording data on rotating disk, the inside
diameter get shorter of sector length and outside diameter get longer of that if the frequency of
Multi-Zone
signals is constant. So we make drive capacity higher if make the sector length same with
Recording
outside diameter and inside diameter. We also say Constant Angular Velocity, CAV and
Constant Linear Velocity, CLV.
MVT Maturity Verification Test, Test for MP possibility.
On-going reliability test. Test for MTBF and long time test in normal condition. ( Burn in test
ORT
progress with mal-condition)
Operating System. Control and manage computer system to use more easily for user.
OS
(DOS, UNIX etc.)
Outer Crash
Parts decide outer range as ARM can move, this parts is a stopper of HEAD out of DISK.
Stop
PALO
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