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SEKUNDARNA MEMORIJA.

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Presentation on theme: "SEKUNDARNA MEMORIJA."— Presentation transcript:

1 SEKUNDARNA MEMORIJA

2 Kruti disk sa većim brojem ploča

3 Pogled na jedan disk i jednu glavu

4 Logičke komponente krutog diska

5 Uredjenost pisti na disku

6 Disk memory elements and key terms.
Disk Memory Basics Disk memory elements and key terms.

7 Odnos izmedju struje upisa, promene fluksa i detektovanog signala kod čitanja

8 Bitska ćelija

9 Tipični kodovi kod digitalnog magnetnog zapisa

10 Talasni dijagrami najčešće korišćenih kodova za magnetni zapis

11 Izgled diska sa aspekta pisti i sektora

12 Način sektorisanja kod diskova

13 Access Time for a Disk The three components of disk access time. Disks that spin faster have a shorter average and worst-case access time.

14 Representative Magnetic Disks Manufacturer and Model Name
Key attributes of three representative magnetic disks, from the highest capacity to the smallest physical size (ca. early 2003). [More detail (weight, dimensions, recording density, etc.) in textbook.] Manufacturer and Model Name Seagate Barracuda 180 Hitachi DK23DA IBM Microdrive Application domain Server Laptop Pocket device Capacity 180 GB 40 GB 1 GB Platters / Surfaces 12 / 24 2 / 4 1 / 2 Cylinders 24 247 33 067 7 167 Sectors per track, avg 604 591 140 Buffer size 16 MB 2 MB 1/8 MB Seek time, min,avg,max 1, 8, 17 ms 3, 13, 25 ms 1, 12, 19 ms Diameter 3.5 2.5 1.0 Rotation speed, rpm 7 200 4 200 3 600 Typical power 14.1 W 2.3 W 0.8 W

15 Organizing Data on Disk
Magnetic recording along the tracks and the read/write head. Logical numbering of sectors on several adjacent tracks.

16 Formatiranje Winchester diska

17 Izgled mini i mikro flopi disketa

18 Tipičan prikaz boot oblasti

19 Odnos izmedju FAT ulaza i cluster-a

20 Struktura arhitekture diska

21 Arhitektura sekundarne magnetne memorije kod IBM PC – AT mašine

22 Jedinica magnetne trake

23 Zapis informacije na magnetnoj traci

24 Fizički raspored pisti

25 Traka i uloga prstena za upis

26 Fizička struktura trake

27 Struktura datoteka na jednom volumenu

28 Datoteka na više volumena

29 Traka sa više datoteka

30 Organizacija zapisa kod streamer traka

31 PC/T format zapisa

32 Lociranje bloka kod PC/T formata

33 Korekcija grešaka kod PC/T formata

34 QIC-24 format sa devet pisti

35 Formati medijuma za optički zapis

36 Princip rada CD-ROM-a

37 Poprečni presek CD-R diska i laserskog snopa

38 Optical Disks Spiral, rather than concentric, tracks Simplified view of recording format and access mechanism for data on a CD-ROM or DVD-ROM.

39 Dvostrani DVD disk u dva nivoa

40 Format CD-ROM-a

41 Tehnologija zapisa

42 Logički layout podataka kod CD-ROM-a

43 Format bloka podataka kod CD-ROM-a


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