1. Data Storage Technology
Present by
Harry Magarang

2. Primary Storage V.S. Secondary Storage

3. What is the characteristics of primary and secondary storage?
Instruction and data currently executing programs flow to and from primary storage.
Secondary storage hold programs that are not currently being executing, as well as group of data item that are too large to fit in primary storage.

4. Primary Storage
Static RAM (SRAM)

5. Primary Storage Dynamic RAM (DRAM)
3GB Dual Channel DDR2 Registered ECC SDRAM at 400MHz

6. Primary Storage
Flash RAM

7. Primary Storage Flash RAM
Samsung Electronics had developed the industry's first 60-nanometer design rule 8-gigabit NAND Flash memory chip used for data storage
The 8Gb NAND flash memory will allow storage of up to 16 hours of DVD quality video.

8. Primary Storage
ROM (Read Only Memory)

9. Secondary Storage
Magnetic Tape
DDS Tape

10. Secondary Storage
Magnetic Tape

11. Secondary Storage Magnetic Disk
Hitachi Deskstar 7K400 Serial ATA RAID 0
Size: 800GB
Seek time: 8.5ms
Rotational Speed: 7200 RPM
Buffer Cache: 8 MB

12. Secondary Storage Magnetic Disk
Western Digital Raptor Serial ATA RAID 0
Size: 148 GB
Seek time: 4.5ms
Rotational Speed: RPM
Buffer Cache: 16 MB

13. Secondary Storage
Magnetic Disk

14. Secondary Storage Magnetic Disk Transcend 1.8" Portable Hard Drive
Capacity: 40 GB
Size: 3.7 x 2.8 x 0.6 inches
Weight: 6.0 ounce

15. Secondary Storage
Magnetic Disk
Floppy

16. Secondary Storage
Optical Disk

17. Secondary Storage Optical Disk CD-ROM CD-R (WORM) Magnet Optical
DVD-ROM
DVD-R
DVD-RAM
DVD-RW
DVD+RW

18. Storage Device Characteristics
Different device are used for different storage purposes because there is no single storage device that is best in all the primary characteristics that distinguish storage device, which include…

19. 1. SPEED
Time required to read or write a bit, byte, or larger unit of data.
Cost increases as speed increase.

20. 2. VOLATILITY
Ability to hold data indefinitely, particularly in the absence of external power.
For device of similar type, cost decrease as volatility increase.

21. 3. ACCESS METHOD
Can be serial, random, or parallel; parallel device are also serial or random access.
Serial is least expensive; random is more expensive than serial; parallel access is more expensive than on-parallel access.

22. 4. PORTABILITY
Ability to easily remove and reinstall the storage media from the device or the device from the computer.
For device of similar type, portability increase cost; if all the there characteristics are held constant.

23. 5. COST & CAPACITY
Maximum data quantity held by the device or storage medium.
Cost usually increase in direct proportion to capacity.