CPT 499C Lecture 2 Partition Tables

CPT 499C Lecture 2 Partition Tables - DEPARTMENT OF...

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Hard Drive Access Slide 1 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Partition Tables In gruesome detail… awesome
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Hard Drive Access Slide 2 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Learning Objectives The student will be able to: Describe the information contained in partition tables Describe the difference between primary and extended partitions Hide and unhide partitions, and identify the presence of hidden partitions Reconstruct partition table entries
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Hard Drive Access Slide 3 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY What’s a Partition? A logical division of a hard disk into multiple sets of resources so that each resource can be operated independently with its own operating system and file system.
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Hard Drive Access Slide 4 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY What’s a Partition? Created to allow The presence of different operating systems on one disk The appearance of multiple disks for file management, multiple users or other purposes Maximum use of a disk when file system limitations are encountered
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Hard Drive Access Slide 5 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY DOS Partition History MSDOS 1.0 supported only floppies. Windows 98 with FAT32 supports partition sizes up to two Terabytes (See notes for more detailed changes in versions.)
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Hard Drive Access Slide 6 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Partition Table Basics MBR contains a partition table Partition tables have a maximum of four possible entries Each entry contains information used to identify the start and end of a partition After each sector that contains a partition table there is a reserved area
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Hard Drive Access Slide 7 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Primary Partitions Partitions that are completely defined in the MBR are “Primary partitions” A primary partition is used to boot an operating system Many drives will have a single, primary partition
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Hard Drive Access Slide 8 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Partition Table Basics One Primary Partition M B R RA FAT32 FAT32 One Primary Partition
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Hard Drive Access Slide 9 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Primary Partitions A drive can have more than one primary partition Up to a maximum of four Having more than one primary partition on a drive is frequently used to allow booting to different operating systems
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Hard Drive Access Slide 10 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Partition Table Basics M B R RA FAT32 FAT16 NTFS FAT32 FAT16 NTFS Three Primary Partitions Three Primary Partitions
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Hard Drive Access Slide 11 DEPARTMENT OF COMPUTER & INFORMATION TECHNOLOGY Extended Partitions The MBR can define one extended partition An extended partition* Can be divided in multiple logical drives* Is like an “envelope” containing all the logical drives in the extended partition * The Carrier text refers to the extended partition as a “Primary extended” partition, and the logical drives as “secondary extended” partitions
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