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File System Forensics THINK BIG WE DO U R I http://www.forensics.cs.uri.edu Digital Forensics Center Department of Computer Science and Statics GUID Partition Table Partitioning GUID Partition Table Partitioning GPT Partitioning GUID Partition Table - Used on Intel IA64 (EFI) Systems - Supports up to 128 Partitions - 64-bit (8 byte) LBA addressing GUID (Globally Unique Identifier) - Uses 128-bit unique identifiers for - Partition Type - Partition Identifier Required for Boot Partitions - Microsoft Windows on an EFI System - Mac OS X GPT Partitioning Protective MBR - Allows compatibility with older systems - Single MBR Partition of type 0xEE Primary GPT Header - General Layout of the disk Partition Entries - Description of Each Partition Partition Area Backup Partition Entries Secondary GPT Header - Backup Copies - Last Sectors of Disk Protective MBR Primary GPT Header Partition Entries Partition 1 Partition 2 . . . Other Partitions . . . Secondary Partition Entries Secondary GPT Header 0 1 2 34 End of Disk (EOD) EOD-1 EOD-33 GPT Partitioning Protective MBR Primary GPT Header Partition Entries Partition 1 Partition 2 . . . Other Partitions . . . Secondary Partition Entries Secondary GPT Header 0 1 2 34 (EOD) EOD-1 EOD-33 Decimal Hex Primary GPT Header 0 00 Signature “EFI PART” 8 08 Version 12 0C GPT Size in Bytes (92) 16 10 CRC32 Checksum of GPT Header 20 14 Reserved 24 18 LBA of Current GPT Structure 32 20 LBA of Other GPT Structure 40 28 Start LBA of Partition Area 48 30 End LBA of Partition Area 56 38 Disk GUID 72 48 Start LBA of Partition Entries 80 50 Number of Entries in Partition Table 84 54 Size of Each Partition Table Entry 88 58 CRC32 Checksum of Partition Table 92 5C Reserved Primary GPT Header GPT Partitioning Protective MBR Primary GPT Header Partition Entries Partition 1 Partition 2 . . . Other Partitions . . . Secondary Partition Entries Secondary GPT Header 0 1 2 34 (EOD) EOD-1 EOD-33 Decimal Hex Partition Entry in Partition Table (128 bytes) 0 00 Partition Type GUID (128-bits) 16 10 Unique Partition GUID (128-bits) 32 20 Starting LBA of Partition 40 28 Ending LBA of Partition 48 30 Partition Attributes 56 38 Partition Name in Unicode Partition Entries Microsoft Windows limits the number of partition table entries to 128. 32 sectors = 128 entries ÷ 4 entries per sector THINK BIG WE DO U R I http://www.forensics.cs.uri.edu Digital Forensics Center Department of Computer Science and Statics GUID Partition Table Partitioning GUID Partition Table Partitioning

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Page 1: File GUID Partition System Table Forensics Partitioningthenry/csc487/video/14_GPT_Partitioning.pdfPartitioning GPT Partitioning GUID Partition Table-Used on Intel IA64 (EFI) Systems-Supports

FileSystemForensics

THINK BIG WE DO

U R Ihttp://www.forensics.cs.uri.edu

Digital Forensics CenterDepartment of Computer Science and Statics

GUID Partition Table

Partitioning

GUID Partition Table

Partitioning

GPT PartitioningGUID Partition Table- Used on Intel IA64 (EFI) Systems- Supports up to 128 Partitions- 64-bit (8 byte) LBA addressing

GUID (Globally Unique Identifier)- Uses 128-bit unique identifiers for- Partition Type- Partition Identifier

Required for Boot Partitions- Microsoft Windows on an EFI System- Mac OS X

GPT PartitioningProtective MBR- Allows compatibility with older systems- Single MBR Partition of type 0xEEPrimary GPT Header- General Layout of the diskPartition Entries- Description of Each PartitionPartition AreaBackup Partition EntriesSecondary GPT Header- Backup Copies- Last Sectors of Disk

Protective MBR

Primary GPT Header

Partition Entries

Partition 1

Partition 2

. . .Other Partitions

. . .

Secondary Partition Entries

Secondary GPT Header

012

34

End of Disk (EOD)EOD-1

EOD-33

GPT PartitioningProtective MBR

Primary GPT Header

Partition Entries

Partition 1

Partition 2

. . .Other Partitions

. . .

Secondary Partition Entries

Secondary GPT Header

012

34

(EOD)EOD-1

EOD-33

Decimal Hex Primary GPT Header0 00 Signature “EFI PART”8 08 Version12 0C GPT Size in Bytes (92)16 10 CRC32 Checksum of GPT Header20 14 Reserved24 18 LBA of Current GPT Structure32 20 LBA of Other GPT Structure40 28 Start LBA of Partition Area48 30 End LBA of Partition Area56 38 Disk GUID72 48 Start LBA of Partition Entries80 50 Number of Entries in Partition Table 84 54 Size of Each Partition Table Entry88 58 CRC32 Checksum of Partition Table92 5C Reserved

Primary GPT Header

GPT PartitioningProtective MBR

Primary GPT Header

Partition Entries

Partition 1

Partition 2

. . .Other Partitions

. . .

Secondary Partition Entries

Secondary GPT Header

012

34

(EOD)EOD-1

EOD-33

Decimal Hex Partition Entry in Partition Table (128 bytes)0 00 Partition Type GUID (128-bits)16 10 Unique Partition GUID (128-bits)32 20 Starting LBA of Partition40 28 Ending LBA of Partition48 30 Partition Attributes56 38 Partition Name in Unicode

Partition Entries

Microsoft Windows limits the number of partition

table entries to 128.

32 sectors = 128 entries ÷ 4 entries per sector

THINK BIG WE DO

U R Ihttp://www.forensics.cs.uri.edu

Digital Forensics CenterDepartment of Computer Science and Statics

GUID Partition Table Partitioning

GUID Partition Table Partitioning

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