DASD ntim yog siv rau khaws cov ntaub ntawv thiab cov haujlwm ua haujlwm tau (nrog rau lub operating system nws tus kheej), thiab rau kev khaws cia ua haujlwm ib ntus. … Cov ntaub ntawv teev tuaj yeem nyob ntawm hom ntaus ntawv, ntim cov naj npawb, thiab cov ntaub ntawv teev npe. Cov qauv no tsis zoo li cov ntoo ntaub ntawv ntawm UNIX® system.
DASD cov ntaub ntawv yog dab tsi?
DASD, hais tias DAZ-dee (Direct access storage device), yog ib tug dav term rau magnetic disk cia liLub sij hawm muaj keeb kwm tau siv nyob rau hauv lub mainframe thiab minicomputer (nruab nrab -range computer) ib puag ncig thiab qee zaum siv los xa mus rau hard disk drives rau tus kheej lub computer.
Dab tsi yog qhov txawv ntawm DASD thiab daim kab xev?
A cov ntaub ntawv ntawm DASD tuaj yeem nkag mus yam tsis tas yuav tsum nyeem los ntawm kev cuam tshuam cov ntaub ntawv los ntawm qhov chaw tam sim no, thaum nyeem lwm yam uas tsis yog cov ntaub ntawv "tom ntej" ntawm daim kab xev yuav tsum skipping dhau intervening cov ntaub ntawv, thiab yuav tsum tau ib tug proportionally ntev lub sij hawm kom nkag mus rau ib tug deb point nyob rau hauv ib tug nruab nrab.
Qhov twg yog qhov ncaj qha nkag disk?
Direct access storage devices (DASDs) yog kho lossis tshem tau cov cuab yeej khaws cia Feem ntau, cov khoom siv no yog rotating disk drives lossis cov khoom hauv lub xeev disks. … Ib qho khoom siv tshem tawm tau yog ib qho khoom siv khaws cia uas tau teev tseg los ntawm tus neeg uas tswj hwm koj lub cev thaum lub sijhawm teeb tsa los ua ib feem ntawm qhov system DASD.
VTOC siv li cas?
VTOC teev cov ntaub ntawv teev uas nyob ntawm nws cov ntim, nrog rau cov ntaub ntawv hais txog qhov chaw thiab qhov loj ntawm txhua cov ntaub ntawv teev, thiab lwm cov ntaub ntawv teev cov cwj pwm. Ib tug txheej txheem z/OS utility program, ICKDSF, yog siv los tsim daim ntawv lo thiab VTOC. … VTOC kuj muaj cov ntawv nkag rau txhua qhov chaw dawb ntawm lub ntim.
