Lahore Leads University 923224907404

1. Name
Munazza Javed
Roll no
F12-1022
Program
BSCS

2. 8
CHAPTER
SECONDARY
STORAGE
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

3. Secondary Storage
Non-Volatile
Permanent
8-3
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

4.  SEQUENTIAL ACCESS DEVICE
 DIRECT ACCESS DEVICE
8-4
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

5.  Most Popular Sequential Device It Consists
Of A Plastic Ribbon Usually (1/2 inch or ¼
inch) Wide Coated With A Recording
Material That Can Be Magnetized.
 The Tape Ribbon Is Stored In Reels, Small
Cartridge, Or Cassette.
8-5
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

6.  Storage Organizations
 Storage Capacity
 Data Transfer Rate
 Tape Drive
 Tape Controller
8-6
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

7.  Track / Channel numbers char of corresponding
 codes

 0123456789 ABCDEFGHI
 7 || | || | | | | | per bits
 6 | | | | || | | |
 5 | | | | || | | | zone
 4 | || ||
 3 |||| |||| |
 2 | | | | | || | Numeric
 1 | | | | | | | | |
8-7
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

8.  Track /channel char for
 corresponding
 0123456789 A BC
 9 || 8 digits
 8 || || || 2 digits
 7 |||||||||||| | || | Added Zone
 6 |||||||||||| | || | Added Zone
 5 |||||||||||| Zone
 4 | | || | Parity
 3 | ||||||||||| Zone
 2 | | | | | | | Unit’s Digits
 1 |||| 4 digits
8-8
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.

9. THANK YOU
8-9
© 2005 The McGraw-Hill Companies, Inc. All Rights Reserved.