Since formatting can create and change file system format, you need to choose the file system type for the USB flash drive to be formatted. There are a number of file systems types such as NTFS, exFAT, FAT16, FAT32, EXT4, EXT3, EXT2, etc. File system provides solutions for operating system to organize data, and different systems adopt separate. The ext3 filesystem is a Linux filesystem with journalling capabilities. I’m always forgetting the command I need to run to format a partitition with the ext3 file system so have posted this article so I always have a easy to find reference for it The example used here is done on. The primary filesystem format in OS X is Apple's HFS Plus (or Mac OS X Extended), which is the default used for any newly formatted disk. And then selecting the Ext2/Ext3 partition and getting. Ext3 was introduced by Stephen Tweedie. Some noteworthy points about ext3 filesystem are as follows. Max file size: 16 GB to 2 TB. Max file system size: 2 TB to 32 TB. One more interesting fact is that if you want journalling mechanism to be in your ext2 filesystem then you can easily convert it to ext3. Now lets understand how to create ext3.
The biggest feature of this kind of file system is that it will record the whole write-in movement of disc so that it is convenient to trace back if it is in need. At the same time MiniTool Partition Wizard can help the ext2 and ext3 to manage the partition file system. Because that informations write-in includes many details such as changing the head information of files, searching for the writable space of disc, writing in the information sector one by one, etc, if any detail is interrupted half way, it will cause the inconformity of file system. Nevertheless, in the journal system, if the process is interrupted, the system can trace back and reform the interrupted part. There is no need to spend the time to examnine other parts. The speed of reformation is rather fast.
Features
1. High Applicability
If the system uses ext3 file system, even after the improper shut down, it needn't examination of file system. After the downtime of system, it only need a few ten seconds to recovery.
2. Integrity of Data
Ext3 file system can promote the integrity of file system to a large extent. It avoids the damage of accidental downtime. To keep the integrity of data, ext3 file system has two modes for you to choose. One is 'keep the consistency of file system and data' mode. Choosing this mode you will never find the junk files after improper shutdown.
3. The Speed of File System
Although when you are using ext3 file system, it needs to repeatedly write in when saving data, but in general ext3 is better than ext2. That is because the journal function of ext3 has optimized the read-write head of disc driver. Therefore read-write performance of file system has not dropped.
4. Data Conversion
Ext2 file system can be easily converted to ext3 file system. It only needs two simple orders to complete the conversion. The users need no time to back up, recover, and format the partition. Use the small tool tune2fs provided by ext3file system, it can easily convert ext2 file system to ext3 journal file system. In addition, ext3 file system can be directly loaded to convert to ext2 file system without any changes.
5. Multi-journal Modes
Ext3 has various journal modes. One working mode is to record all the file data and metadata (the data of definition file system data, the data of data) (data=journal mode.). Another working mode is to record the metadata, and not to record data. That is data=ordered or data=writeback mode. The system manager can choose between the speed or the consistency of file data according to the practical work requirement of system.
Ext3 Overview
Developer: open source
Full name: Third extended file system
Release time: November, 2001 (Linux 2.4.15)
Partition identification: 0x83 (MBR)；EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (GPT)
Ext3 Structure
Directory: list, tree
File allocation: bitmap (clear area), list (metadata)
Bad block: list
Limitation
The largest file: 16GiB-64TiB
The greatest file number: changeable
The longest file name: 255bytes
The largest volume: 2TiB-32TiB
The allowed characters: all the bytes except NUL or '/'
Function
Record date: mtime, ctime, atime
Date limit: December 14, 1901- January 18, 2038
Date resolution: 1 second
Fork: yes
Attributes: No-atime, append-only, synchronous-write, no-dump, h-tree (directory), immutable, journal, secure-delete, top (directory), allow-undelete
Accesss right: Unix permission, ACLs and arbitrary security attributes (Linux 2.6 and later)
Transparent compression: no
Transparent encryption: no (block device level provided)
Support operating system: Linux, BSD, and Windows (through IFS)
Ventoy Disk Layout In MBR
Create Partition For Ext3 Filesystem For Usb Mac Pro
Above is a 32GB USB drive's layout after install Ventoy in it. You can see that the whole disk was divided into 2 partitions in MBR format.
- Why MBR
As with managing Ext2 and Ext3 drives, create a folder on your Mac to use as a mount point 3. In Terminal, run a command similar to the following to access a folder on the remote system and mount.
MBR is the only selection in order to support Legacy BIOS system.
- About Part1
By default, Ventoy select exFAT filesystem for the main partition to hold iso files. exFAT has better compatibility on Windows/Linux/Mac and exFAT is suitable for USB stick.
From Ventoy-1.0.11, you can reformat the 1st partition with other filesystem, exFAT/FAT32/NTFS/UDF/XFS/Ext2/Ext3/Ext4 are supported.
It should be noted that, if you choose XFS/Ext2/Ext3/Ext4, the USB will be unavaliable on Windows and can not be used to install Windows.But if you only use Linux that will be a good choice, because XFS/Ext2/Ext3/Ext4 will have better performance in Linux.
Create Partition For Ext3 Filesystem For Usb Mac Os
- About Part2
There must be an EFI System Partition with FAT filesystem and that's the mandatory requirements of UEFI specifications.So this partition is created to hold EFI boot file and other files nesscessy to Ventoy. These files are very small, so 32MB is enough. Besides, the EFI partition can be at part1 also, but I set it at part2 just because that in some version of Windows like Windows 7, only the first partition of the USB drive is visable to the system.And that's good for Ventoy's protection.
This partition is very small and used by ventoy, so you better not change anything in this partition.
- About 1MB GAP
This gap is used to hold the bootloader in Legacy BIOS system.
Reserved Disk Space
Since 1.0.14, you can preserve some space at the bottom of the disk. This is a 32GB USB drive's layout after install Ventoy in it (with 2GB reserved space).
When install Ventoy, you can enable and set the reserved space with 'Option' ---> 'Partition Configuration' (Windows) or '-r' option (Linux). The reserved space configuration is only for installation process.
- The reserved space must at the bottom of the disk
- Ventoy MUST use Part1 and Part2, don't change their position and size.
- You can create Part3 and Part4 with the reserved space and use them as you want.