YHard Disk vs RAM
RAM thiab Hard disk Drive yog ob hom kev nco siv hauv computer. Lawv ob qho tib si tseem ceeb thiab ua haujlwm sib txawv hauv qhov system. HDD lossis Hard Disk Drive khaws cov ntaub ntawv khaws cia ruaj khov thiab RAM khaws cov ntaub ntawv rau kev siv lub sijhawm luv luv los ntawm cov txheej txheem thiab lwm yam khoom xws li VGA.
Tsis yog lawv koom nrog ob chav sib txawv ntawm cov khoom siv nco, tab sis kuj lawv cov qauv, kev ua tau zoo, thiab lub peev xwm sib txawv kiag li ntawm ib qho.
Hard Disk Drive (HDD) / Hard Drive
Ib lub hard disk drive (HDD) yog cov ntaub ntawv thib ob uas siv los khaws thiab khaws cov ntaub ntawv digital hauv computer. Taw qhia los ntawm IBM hauv xyoo 1956, hard disk drive yog qhov tseem ceeb thib ob cia khoom siv rau cov khoos phis tawj dav dav thaum xyoo 1960s thiab tseem yog daim ntawv tseem ceeb ntawm kev khaws cia. Cov thev naus laus zis tau txhim kho zoo txij li nws tau qhia.
Ib lub hard disk drive muaj cov hauv qab no.
1. Logic Board - tus tswj Circuit Court board ntawm HDD, nws sib txuas lus nrog cov processor thiab tswj cov khoom cuam tshuam ntawm HDD tsav.
2. Actuator, Lub suab coil thiab lub cev muaj zog - tswj thiab tsav lub caj npab tuav lub sensors siv los sau thiab nyeem cov ntaub ntawv.
3. Actuator Arms - ntev thiab daim duab peb sab hauv cov hlau zoo li lub hauv paus nrog rau tus actuator, nws yog cov qauv tseem ceeb txhawb kev nyeem-sau taub hau.
4. Sliders - tsau rau qhov kawg ntawm lub caj npab actuator, thiab nqa cov ntawv nyeem sau taub hau hla cov disks.
5. Nyeem / Sau Lub Taub Hau - sau thiab nyeem cov ntaub ntawv los ntawm cov hlau nplaum disks.
6. Spindle thiab Spindle Tsav - lub hauv paus sib dhos ntawm cov disks thiab lub cev muaj zog tsav lub disks
7. Hard Disks - tham hauv qab no
Lub hard drive yog qhov tseem ceeb vim lawv lub peev xwm thiab kev ua haujlwm. Lub peev xwm ntawm HDDs txawv ntawm tsav mus rau lwm qhov tab sis tau nce zuj zus mus ib ntus. Feem ntau, lub PC niaj hnub siv HDD nrog lub peev xwm hauv TeraByte ntau yam. Rau cov khoos phis tawj hauv cov haujlwm tshwj xeeb xws li cov chaw khaws ntaub ntawv siv cov hard drive uas muaj peev xwm ntau dua.
Qhov kev ua tau zoo ntawm lub hard drive yog tus yam ntxwv los ntawm Lub Sijhawm Nkag Mus, Kev Sib Hloov Ncua, thiab Hloov Ceev. Lub sijhawm nkag mus yog lub sijhawm siv los pib lub actuator los ntawm tus maub los kom txav tus actuator caj npab nrog cov nyeem / sau taub hau rau hauv txoj hauj lwm hla txoj kev zoo. Kev sib hloov qeeb yog lub sijhawm nyeem / sau lub taub hau yuav tsum tau tos ua ntej qhov kev npaj ua haujlwm / pawg tig mus rau hauv txoj haujlwm. Hloov ceev yog cov ntaub ntawv tsis thiab hloov pauv tus nqi los ntawm lub hard drive.
Hard drives txuas nrog lub rooj tsav xwm loj uas siv ntau qhov sib txawv. Enhanced Integrated Drive Electronics (EIDE), Me Me Computer System Interface (SCSI), Serial Attached SCSI (SAS), IEEE 1394 Firewire, thiab Fiber Channel yog lub ntsiab interfaces siv nyob rau hauv niaj hnub computer systems. Feem ntau ntawm cov PCs siv Enhanced Integrated Drive Electronics (EIDE) uas suav nrog Serial ATA (SATA) thiab Parallel ATA (PATA) interfaces.
Hard Disc Drives yog cov tshuab tsav nrog cov khoom txav hauv lawv; Yog li ntawd, dhau sij hawm thiab siv sij hawm ntev hnav thiab tsim kua muag tshwm sim, ua rau lub cuab yeej siv tsis tau.
RAM
RAM stands rau Random Access Memory, uas yog lub cim xeeb siv los ntawm cov khoos phis tawj los khaws cov ntaub ntawv thaum lub sijhawm suav cov txheej txheem. Lawv tso cai rau cov ntaub ntawv nkag mus rau hauv ib qho kev txiav txim random, thiab cov ntaub ntawv yog volatile; i.e. cov ntaub ntawv raug puas tsuaj thaum lub zog rau lub cuab yeej nres.
Nyob rau hauv computers thaum ntxov, relay configurations tau siv raws li lub RAMs, tab sis nyob rau hauv niaj hnub computer systems cov RAM li yog cov khoom nyob rau hauv lub xeev nyob rau hauv daim ntawv ntawm kev sib txuas circuits. Muaj peb chav kawm tseem ceeb ntawm RAM; Static RAM (SRAM), Dynamic RAM (DRAM) thiab Phase-hloov RAM (PRAM). Hauv SRAM cov ntaub ntawv khaws cia siv lub xeev ntawm ib qho flip-flop rau txhua qhov me me; Hauv DRAM ib lub capacitor yog siv rau txhua qhov me me.
Dab tsi yog qhov txawv ntawm RAM thiab Hard Disk Drive?
• Hard disk drive yog hom khoom siv thib ob uas yog ROM (Nyeem Tsuas Nco) qeb thaum RAM yog tag nrho lwm hom kev nco. Txawm hais tias txhua lub RAM tsis yog ib qho khoom siv hauv lub xeev, kev siv ib txwm hais txog cov qauv kev sib xyaw ua ke siv hauv computers.
• RAM yog lub cim xeeb tsis hloov pauv thaum HDD yog lub cim xeeb tsis hloov pauv. Yog li ntawd, thaum lub hwj chim raug txiav mus rau hauv Circuit Court, cov ntaub ntawv hauv RAM raug rhuav tshem, tab sis cov ntaub ntawv hauv HDD tsis hloov.
• RAM khaws cov ntaub ntawv tseem ceeb (cov ntaub ntawv ntawm cov haujlwm ua haujlwm thaum lub sijhawm suav nrog OS thiab lwm yam software), thaum HDD khaws cov ntaub ntawv uas xav tau qhov chaw ruaj khov.
• Cov ntaub ntawv hauv RAM tuaj yeem nkag tau sai dua li cov ntaub ntawv hauv HDD
• HDDs yog cov khoom siv hluav taws xob thaum RAM yog cov khoom siv hauv lub xeev thiab tsis muaj qhov txav mus los.
• Hauv kev teeb tsa lub khoos phis tawj ib txwm, RAM loj me dua li HDD loj (RAM 4GB-16GB / HDD 500GB - 1TB).
