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Ministry of Higher Education
Higher Technological Institute
Computer Science Department
Second Year
Course: File organization- INF 221
1
| P a g e
Sheet 3: Secondary Storage Devices
Theoretical
1. Classify types of storage devices?
2. Describe in details the simplified structure of a disk with drawing?
3. What is meaning of internal fragmentation, FAT, extent and cluster?
4. Describe in details Redundant Array of Independent Disks?
5. State the main drawbacks of tapes and draw tape organization architecture?
6. Compare between disks and tapes?
7. Compare between CD and DVD?
8. Describe in details dual layer disc?
Programs
9. If we have fixed length records and number of records =50000 records when size of
record =256 bytes, how many cylinders are needed if the disk characteristics as the
following:
 Number of bytes per sector = 512
 Number of sectors per track = 63
 Number of tracks per cylinder = 16
 Number of cylinders = 4092
10. How many records can be stored per track for the following blocking factors?
 Block factor = 10
 Block factor = 60
If Disk characteristics and File Characteristics
 Block-addressable Disk Drive
 Size of track = 20.000 bytes
 Nondata overhead per block = 300 bytes
 Record size = 100 bytes
with all my best wishes

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sheet 3-4.pdf

  • 1. Ministry of Higher Education Higher Technological Institute Computer Science Department Second Year Course: File organization- INF 221 1 | P a g e Sheet 3: Secondary Storage Devices Theoretical 1. Classify types of storage devices? 2. Describe in details the simplified structure of a disk with drawing? 3. What is meaning of internal fragmentation, FAT, extent and cluster? 4. Describe in details Redundant Array of Independent Disks? 5. State the main drawbacks of tapes and draw tape organization architecture? 6. Compare between disks and tapes? 7. Compare between CD and DVD? 8. Describe in details dual layer disc? Programs 9. If we have fixed length records and number of records =50000 records when size of record =256 bytes, how many cylinders are needed if the disk characteristics as the following:  Number of bytes per sector = 512  Number of sectors per track = 63  Number of tracks per cylinder = 16  Number of cylinders = 4092 10. How many records can be stored per track for the following blocking factors?  Block factor = 10  Block factor = 60 If Disk characteristics and File Characteristics  Block-addressable Disk Drive  Size of track = 20.000 bytes  Nondata overhead per block = 300 bytes  Record size = 100 bytes with all my best wishes