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UNIT 4 Peripherals (Ready for the Bazillion - Byte Drive)

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A. Find the answers to these questions in the following text. 1. What is Currie Munce's main aim? 2. How quickly did the possible areal density of hard disks increase in the 1990s? 3. How long does Munce think magnetic recording technology will continue to make. rapid advances in capacity? 4. What problem does he predict for magnetic storage? 5. What is the predicted limit for discrete bit magnetic storage capacity? 6. What storage technologies might replace current magnetic systems? 7. What is the advantage of holographic storage being three-dimensional? 8. What improvements are predicted due to the fast access rates and transfer times of holographic storage? 9. What is predicted to be the most important high capacity removable storage media in the next 10 years? What method of software distribution is likely to replace optical disks?

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Ready for the Bazillion - Byte Drive? (Ready for the
Bazillion - Byte Drive?)
Berpikir untuk menulis memoar Anda - menuliskan kisah hidup Anda di atas kertas untuk
selama-lamanya? Mengapa tidak melewatkan cedera regangan berulang dan merekam seluruh
hidup Anda dalam video gerakan penuh, memasukkan semuanya ke dalam perangkat seukuran
kubus gula? Mungkin tidak sejauh yang Anda pikirkan.

Currie Munce, direktur Divisi Sistem Penyimpanan Teknologi HDD Lanjutan IBM, memiliki satu
tujuan yang diakui: Membangun penyimpanan yang lebih besar. Baru-baru ini Munce dan
sesama Ph. D mengembalikan keunggulan Big Blue dalam perlombaan ruang disk dengan rekor
dunia baru untuk kepadatan areal (bit): 35,3 gigabit per inci persegi - kira-kira tiga kali lebih
padat dari pengiriman drive mana pun pada waktu pers.

Selama tahun 1990-an, kepadatan areal meningkat dua kali lipat setiap 18 bulan, sejalan
dengan peningkatan kepadatan transistor yang diprediksi oleh Hukum Moore. Tetapi tantangan
teknis yang semakin menakutkan dihadapi mereka yang akan mendorong amplop penyimpanan
lebih jauh. 'Saya pikir teknologi perekam magnetik memiliki keunggulan 5 sampai 10 tahun lagi,'
kata Munce. 'Setelah itu, kita akan melihat kesulitan substansial dengan kemajuan lebih lanjut
dengan kecepatan yang biasa dilakukan orang. '

Dari sini, fenomena yang disebut superparamagnetisme mengancam untuk membuat bit padat
yang dikemas menjadi tidak stabil. Asalkan perkembangan baru terus menggagalkan korupsi
superparamagnetik, para ilmuwan berspekulasi bahwa batas teoritis untuk perekaman bit
diskrit adalah 10 terabit per inci persegi (1 terabit = 1.000 gigabit).

Mendekati batas ini akan membutuhkan teknologi baru. Dua pesaing yang mungkin adalah
mikroskop gaya atom (AFM) dan penyimpanan holografik.

AFM akan menggunakan piringan plastik yang berputar, mungkin di dalam jam tangan, dan
penopang kecil 10 mikron dengan ujung 40-angstrom (angstrom mewakili perkiraan radius
atom) untuk menulis data. Secara teori, AFM akan memungkinkan kepadatan 300 hingga 400
gigabit per inci persegi.

Saat AFM masih di lab, penyimpanan holografik lebih mendekati kenyataan. Menurut Rusty
Rosenberger, manajer program optik untuk Imation, 'Kami menargetkan disk 5 1/4 inci dengan
penyimpanan 125 GB dan kecepatan transfer 40 MB per detik. 'Iterasi masa depan sistem
holografik harus meningkat secara substansial.

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