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Abstrak :
The book covers the recent developments in the field of materials for advancing recording technology by experts worldwide. Chapters that provide sufficient information on the fundamentals will be also included, so that the book can be followed by graduate students or a beginner in the field of magnetic recording. The book also would have a few chapters related to optical data storage. In addition to helping a graduate student to quickly grasp the subject, the book also will serve as a useful reference material for the advanced researcher. The field of materials science related to data storage applications (especially hard disk drives) is rapidly growing. Several innovations take place every year in order to keep the growth trend in the capacity of the hard disk drives. Moreover, magnetic recording is very complicated that it is quite difficult for new engineers and graduate students in the field of materials science or electrical engineering to grasp the subject with a good understanding. There are no competing books in this area, considering that a book that may look 50% similar to the proposed book was published in 2001. A span of 6 years is too long gap, considering the progress this field makes every year. "The book covers the recent developments in the field of materials for advancing recording technology by experts worldwide. Chapters that provide sufficient information on the fundamentals will be also included, so that the book can be followed by graduate students or a beginner in the field of magnetic recording. The book also would have a few chapters related to optical data storage. In addition to helping a graduate student to quickly grasp the subject, the book also will serve as a useful reference material for the advanced researcher"-- Provided by publisher.

Abstrak :
ABSTRAK
Dalam thesis ini dibuat model penyimpanan stabil berbasis pesan yang dapat menyediakan keberadaan, konsistensi, dan kemutakhiran versi arsip pada sistem terdistribusi meskipun terjadi kerusakan pada media penyimpan (disk) secara fisik maupun terjadi kegagalan prosesor (crash).

Model yang dibuat menggunakan dua buah disk yang berbeda, yang masing-masing terhubung dengan. mesin yang berbeda pula. Digunakannya dua buah disk tersebut untuk menjaga keberadaan arsip bila terjadi kerusakan disk. Sedang untuk menjaga keberadaan dan konsistensi arsip terhadap kegagalan prosesor, model yang dibuat menggunakan prinsip update atomik dan kesepakatan antara kedua pihak, yaitu pihak klien dan pihak pelayan. Dengan cara memberikan status kepada setiap arsip yang diakses, kemutakhiran versi arsip dapat dijamin. Status arsip bernilai 1 bila pada proses penulisan tidak terjadi kegagalan, dan sebaliknya akan bernilai 0 bila terjadi kegagalan.

Model yang dibuat telah diimplementasikan pada mesin Sun maupun HP (Hewlett-Packard) yang terhubung dalam sistem terdistribusi. Untuk melakukan komunikasi antar proses pada model yang dibuat, digunakan protokol TCP/IP.