Storage TechnologiesStorage TechnologiesDrive PartitioningDrive Partitioning

Borislav Borislav VaradinovVaradinov

Telerik Software Academy

Telerik Software Academy

academy.telerik.com

System AdministratorSystem AdministratorMarian Marian

MarinovMarinovCEO of 1H Ltd.CEO of 1H Ltd.mm@1h.commm@1h.combobi@itp.bgbobi@itp.bg

Table of ContentsTable of Contents Disk StructureDisk Structure PartitionsPartitions MBRMBR GPTGPT Partition TablePartition Table

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Disk StructureDisk Structure

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Чиния

Вилица

Двойна Вилица!?!?!?

Бисерите в курса по ОС:"Все едно се редуват: чиния, вилица; чиния, вилица; чиния, вилица; а между две чинии има ... двойна вилица!"

Бисерите в курса по ОС:"Все едно се редуват: чиния, вилица; чиния, вилица; чиния, вилица; а между две чинии има ... двойна вилица!"

Disk Structure Disk Structure

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What is a Partition and What is a Partition and why we need why we need

partitions?partitions?

Dividing a hard disk drive into Dividing a hard disk drive into multiple logical storage units multiple logical storage units

Partitions are treated by the Partitions are treated by the operating system as an independent operating system as an independent storage area storage area

Can be used for separation of OS data Can be used for separation of OS data and application/user data.and application/user data.

Each partitions has own file systemEach partitions has own file system 5

Partitions are collections of contiguous sectors on a storage device. Each partitions is separated part from other portions of the disk.

Partitions are collections of contiguous sectors on a storage device. Each partitions is separated part from other portions of the disk.

Partitions Editors Partitions Editors (Tools)(Tools)

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Master Boot Record Master Boot Record (MBR)(MBR)

A master boot record consists of A master boot record consists of three major pieces:three major pieces: Master boot codMaster boot codее

Master partition tableMaster partition table

Disk signature (optional)Disk signature (optional)

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The master boot record is created when a hard drive is partitioned but is not located within a partition. The master boot record is located on the first sector of a disk

The master boot record is created when a hard drive is partitioned but is not located within a partition. The master boot record is located on the first sector of a disk

MBR Partition TableMBR Partition Table

Records a partition’s typeRecords a partition’s type Stores a partition’s starting sector Stores a partition’s starting sector

and size and size it is always located on the same it is always located on the same

disk as the partitiondisk as the partition

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The partition table consists of four entries that define the locations of as many as four primary partitions on a disk

The partition table consists of four entries that define the locations of as many as four primary partitions on a disk

MBR Partitions SchemeMBR Partitions Scheme

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Primary and ExtendedPrimary and Extended Primary PartitionsPrimary Partitions

Limited to only four per physical driveLimited to only four per physical drive Required for a system to bootRequired for a system to boot

Extended PartitionExtended Partition There is only one per physical driveThere is only one per physical drive Subdivided into a number of logical Subdivided into a number of logical

drivesdrives The number of logical drives is limited The number of logical drives is limited

only by the amount of available disk only by the amount of available disk spacespace

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GPTGPT

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Drive PartitioningDrive Partitioning

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