Download presentation
Presentation is loading. Please wait.
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
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.