Xawaaraha Hard Disk-ga !!

Sawir muujinaya qaybaha Hard Disk-ga

Casharka 14-aad iyo Casharka 15-aad waxaan kaga hadalnay guud ahaan waxa uu Hard Disk-gu yahay iyo qaybaha uu ka kooban yahay oo aan ka soo qaadannay kuwa ugu muhiimsan oo ah kuwa sawirka kore ka muuqda ee ay nambarradu ku ag qoran yihiin. Casharkaana waxaan ku soo qaadan doonnaa xawaaraha Hard Disk-ga. Waxaan ka hadli doonnaa qaybaha saamaynta ku leh xawaaraha Hard Disk-ga. Si aan qaybahaas u tilmaanno waxaan adeegsan doonnaa sawirka kor kaaga muuqda oo aan casharkaan ugu soo darnay arrintaas darteed.

Xawaaraha Hard Disk-ga waxaa loo kala qaadaa dhowr qodob oo ay ugu muhiimsan yihiin:

1. Seek Time
2. Latency
3. Access Time

Saddexdaas qodob ayaan halkaan mid mid ugu soo qaadan doonaa.

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1. Seek Time

Si Heads-ku ay akhbaar uga soo akhriyaan ama ugu qoraan Platters-ka Hard Disk-ga, waa inay horta tagaan Track-ga markaas la rabo in wax laga soo akhriyo ama wax lagu qoro. Wakhtiga ay arrintaasi qaadataa wuxuu ku xiran yahay inta ay le'eg tahay fogaanta u dhexaysa Track-ga la raadinayo iyo Track-ga ay markaas Heads-ku taagan yihiin. Wakhtiga celcelis ahaan ay Heads-ka ku qaadato inay tagaan hadba Track-ga loo baahan yahay ayaa la yiraahdaa Seek Time. Seek Time-ku wuxuu si toos ah ugu xiran yahay xawaaraha Actuator-ka oo ah qaybta isku haysa isla markaana dhaqaajisa Heads-ka (Fiiri sawirka kore qaybta uu nambarkeedu yahay 4). Seek Time-ka waxaa lagu cabiraa waxa loo yaqaan milliseconds oo loo soo gaabiyo "ms" una dhigma hal ilbiriqsi (second) oo loo qaybiyay milyan qaybood qayb ahaan. Seek Time-ka Hard Disk-yada casriga ah ee maanta la isticmaalaa wuxuu celcelis ahaan u dhexeeyaa 4 ilaa 10 ms. Arrintaa Waxaad garab dhigtaa xawaaraha Memory-da oo sidaan Casharka 13-aad ku soo sheegnay lagu cabiro nanoseconds (ns) oo u dhigma hal ilbiriqsi oo loo qaybiyay bilyan qaybood qayb ahaan. Horeyna waxaan u soo sheegnay in Memory-du ay aad uga gaabiso Processor-ka.

Halkaa waxaad ka garan kartaa in Hard Disk-gu uu ka mid yahay qaybaha kumbiyuutarka kuwa xawaare ahaan ugu gaabiya. Waxaa in badan dhacda in qaybaha kale ee kumbiyuutarku ay iska fadhiyaan oo ay sugaan in Hard Disk-gu uu hawsha qaybta kaga aaddan soo dhammeeyo. Seek Time-ku wuxuu ka mid yahay uguna horreeyaa waxyaabaha Hard Disk-ga wakhtiga ugu badan ka qaata, mar kasta oo uu Seek Time-ku sii yaraadana waxaa kor u kaca xawaaraha Hard Disk-ga taasoo iyaduna kor u qaadda xawaaraha hawl qabadka guud ee kumbiyuutarka. Sidaa darteed shirkadaha Hard Disk-yada sameeyaa waxay ku tartamaan xoogna ay saaraan in ay had iyo jeer hoos u dhigaan Seek Time-ka Hard Disk-ga. Waxaa suuqa Hard Disk-yada caadi ka noqotay in Seek Time-ka laga dhigo xawaaraha Hard Disk-ga oo dhan. Waxaad meelaha Hard Disk-yada lagu gado inta badan ka maqlaysaa iyadoo tusaale ahaan la oranayo xawaaraha Hard Disk-gaani yahay 9 ms, taasoo inta badan lagu saleeyo Seek Time-ka Hard Disk-gaas. Taasina waxay kuu caddaynaysaa sida uu Seek Time-ku muhiim ugu yahay xawaaraha Hard Disk-ga.

2. Latency

Sida aan hore uga soo hadalnay marka Platters-ka waxa laga soo akhrinayo ama wax lagu qorayo waxaa loo baahan yahay in Heads-ku ay horta tagaan Track-ga markaas loo baahan yahay. Marka ay Heads-ku halkaa tagaan waxay sugaan inta Sector-ka ay akhbaartu ku qoran tahay uu ka imaanayo halka ay Heads-ku markaa taagan yihiin. Wakhtiga ay taasi qaadato wuxuu ku xiran yahay fogaanta uu Sector-ka la rabaa u jiro halka ay Heads-ku markaa taagan yihiin. Celceliska wakhtiga ay qaadato in Sector-ka la rabaa uu ku yimaado halka ay Heads-ku joogaan ayaa la yiraahdaa Latency. Latency-ga Hard Disk-gu wuxuu si toos ah ugu xiran yahay xawaaraha uu ku wareego Spindle-ka Hard Disk-ga oo ah tiir dhexaadka ay Platters-ku ku dul rakiban yihiin ee wareejiya (Fiiri sawirka kore qaybta uu nambarkeedu yahay 3). Xawaaraha Spindle-ka waxaa lagu cabiraa waxa loo yaqaan RPM (Revolutions Per Minute) oo u taagan inta wareeg ee uu Spindle-ku sameeyo halkii daqiiqo. Xawaaraha Spindle-ka Hard Disk-yada maanta la isticmalo wuxuu u dhexeeyaa 4200 RPM ilaa 15000 RPM.

Latency-ga waxaa sida Seek Time-ka lagu cabiraa Milliseconds (ms) waxaana xisaab ahaan lagu helaa 30000 (soddon kun) oo loo qaybiyey xawaaraha Spindle-ka. Tusaale ahaan haddii xawaaraha Spindle-ku uu yahay 4200 RPM, markaa wuxuu Latency-gu noqonayaa 30000/4200 = 7.1 ms. Haddiise uu xawaaraha Spindle-ku yahay 15000 (Shan iyo tobon kun) RPM, markaa Latency-gu wuxuu noqonayaa 30000/15000 = 2 ms.
Marka laga hadlayo xawaaraha Hard Disk-ga waxaa sidaan hore u soo sheegnay inta badan aad looga hadlaa Seek Time-ka, waxaadse halkan ka aragtaa in Latency-gu uu door weyn ka cayaaro xawaaraha Hard Disk-ga oo uusan Seek Time-ka kaligiis ku filnayn cabirridda xawaaraha rasmiga ah ee Hard Disk-ga. Sidaa darteed waa muhiim in marka aad Hard Disk gadanayso aad ogaato Latency-gu inta uu yahay ama ugu yaraan xawaaraha Spindle-ku inta uu yahay si aad markaa iskaa ugula soo baxdo Latency-ga.

3. Access Time

Qodobada saamaynta ku leh xawaaraha Hard Disk-ga oo la isu geeyay ayaa waxaa la isku yiraahdaa Access Time. Qodobada uu Access Time-ku ka kooban yahay waxaa ugu muhiimsan labada qodob ee aan kor uga soo hadalnay ee kala ah Seek Time iyo Latency. Haddii uu tusaale ahaan Hard Disk-ga Seek Time-kiisu uu yahay 8 ms, Latency-giisuna uu yahay 5 ms, markaa wuxuu Access Time-ka Hard Disk-gaasi noqonayaa 8 + 5 = 13 ms. Access Time-ku waa qodobka ugu muhiimsan ee lagu cabbiro xawaaraha dhabta ah ee Hard Disk-ga waayo wuxuu sheegayaa wakhtiga ay Hard Disk-ga ku qaadato inuu akhbaar ka soo akhriyo ama uu ku qoro Platters-ka.

Inkastoo uu Access Time-ku yahay qodobka ugu muhiimsan xaqiiqadana ugu dhow ee lagu cabbiro xawaaraha Hard Disk-ga, haddana waxaa la yaab leh in ay yar tahay inta la isticmaalo oo shirkada Hard Disk-yada sameeyaa waxay had iyo jeer ka door bidaan qodobada kale sida Seek Time-ka. Waayo qodobada oo la kala qaado ama xataa mid keliya laga soo qaataa waxay Hard Disk-ga u muujinaysaa sidii inuu ka dheereeyo xawaarihiisa dhabta. Sidaa darteed waa muhiim in marka aad Hard Disk gadanayso ama aad is barbar dhigayso laba Hard Disk aad ogaato Access Time-ka Hard Disk-ga si aad u ogaato xawaaraha dhabta ah ee Hard Disk-gaas. Haddii aysan kuu suurtoobayn inaad ogaato Access Time-ka waxaad ugu yaraan codsataa inaad hesho Seek Time-ka iyo Latency-ga. Waayo labadaas qodob oo la isu geeyay waxay ku siinayaan qiime aad iyo aad ugu dhow Access Time-ka Hard Disk-gaas.

Casharkaanna halkaas ayaan ku joojinaynaa. Casharka xiga waxaan hadduu rabbi idmo ku soo qaadan doonnaa noocyada Hard Disk-ga (IDE

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Written by mahbuub

a computer geek and a junior compo programmer by interest and lecturer in accounting by profession. He got his MSIT, BBIT, and MBA in Community Development at Golis University - Burao and Fair Land University - Hargesia. He has an excellence work experience with Excel Accounting/Financial Accounting, AIS/MIS/FIS/Computerized Accounting. He also masters in Excel Programming, Access Programming not to mention that he is an IT Professional in Microsoft Studio and Visual Basic Programming , Web Development in "PHP, Joomla, Wold Press. He also trained in Networking, Hardware, IT Security all in all Maxbuub has a limit let potentials and skills and he chooses to share all of that an more in this blog. Facebook: https://www.facebook.com/MrBura0