W95 Ext'd (LBA) Partition

Provides a quick introduction on W95 Ext'd LBA (Windows 95 Extended Logical Block Addressing) Partition, which is actually a container to hold sub-partitions.

If you are using a hard disk create from a Windows computer, you may see a special partition with the "W95 Ext'd (LBA)" type. W95 Ext'd (LBA) stands for Windows 95 Extended Logical Block Addressing.

"W95 Ext'd LBA" is not a file system partition. It is actually a container to hold sub-partitions. On Windows systems, a hard disk can only be divided up to 4 partitions. "W95 Ext'd LBA" technology allows you create more sub-partitions from those 4 primary partitions.

If you see a hard disk that has more than 4 partitions, or you see a partition index higher than 4, you know that "W95 Ext'd LBA" is used on the hard disk.

For example, I have the following partitions on my CentOS computer:

herong$ sudo fdisk -l /dev/sda

Disk /dev/sda: 900.0 GiB
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sda1  *          2048  167776255  167774208    80G  7 HPFS/NTFS/exFAT
/dev/sda2        167776256 1953523711 1785747456 851.5G  f W95 Ext'd (LBA)
/dev/sda5        167778304 1748721663 1580943360 753.9G  7 HPFS/NTFS/exFAT
/dev/sda6       1748723712 1750820863    2097152     1G 83 Linux
/dev/sda7       1750822912 1953523711  202700800  96.7G 8e Linux LVM

The output tells me that:

So do not try to mount "W95 Ext'd LBA" formatted /dev/sda2 to Linux system, it is not a true file system.

Table of Contents

 About This Book

 Introduction to Linux Systems

 Cockpit - Web Portal for Administrator

 Process Management

 Files and Directories

 Users and Groups

File Systems

 "df" - Display Free Space of File System

 Mount USB Drive as File System

 "fdisk" - Format Disk Partitions

 "dd" - Copy Data from/to Storage Devices

 Use "dd" Command to Test I/O Speed

 "hdparm" - Hard Disk Parameters

 "du" - Display Disk Usage of Directories

 Mount Windows NTFS File System

 Access Persmissions on "ntfs-3g" File System

 Mount Windows Shared Folders

W95 Ext'd (LBA) Partition

 File System Types, IDs and Formats

 LVM (Logical Volume Manager)

 "parted" - Partition Manipulation Program

 Reformat NTFS Partition into EXT4 Partition

 Unreachable Remote File Systems

 Installing CentOS

 SELinux - Security-Enhanced Linux

 Network Connection on CentOS

 Software Package Manager on CentOS - DNF and YUM

 Running Apache Web Server (httpd) on Linux Systems

 Running PHP Scripts on Linux Systems

 Running MySQL Database Server on Linux Systems

 Running Python Scripts on Linux Systems

 vsftpd - Very Secure FTP Daemon

 Postfix - Mail Transport Agent (MTA)

 Dovecot - IMAP and POP3 Server

 Email Client Tools - Mail User Agents (MUA)

 GCC - C/C++ Compiler

 Conda - Environment and Package Manager

 Tools and Utilities

 References

 Full Version in PDF/EPUB