You can easily add or delete volumes in APFS containers. For example, folders named “Homework” and “HOMEWORK” are two different folders. For example, folders named “Homework” and “HOMEWORK” are two different folders.ĪPFS (Case-sensitive, Encrypted): Uses the APFS format, is case-sensitive to file and folder names, and encrypts the volume. Choose this option if you don’t need an encrypted or case-sensitive format.ĪPFS (Encrypted): Uses the APFS format and encrypts the volume.ĪPFS (Case-sensitive): Uses the APFS format and is case-sensitive to file and folder names.
Each volume uses only part of the overall container, so the available space is the total size of the container, minus the size of all the volumes in the container.Ĭhoose one of the following APFS formats for Mac computers using macOS 10.13 or later.ĪPFS: Uses the APFS format. If desired, you can specify reserve and quota sizes for each volume.
When a single APFS container has multiple volumes, the container’s free space is shared and is automatically allocated to any of the individual volumes as needed. macOS 10.13 or later supports APFS for both bootable and data volumes.ĪPFS allocates disk space within a container (partition) on demand. While APFS is optimized for the Flash/SSD storage used in recent Mac computers, it can also be used with older systems with traditional hard disk drives (HDD) and external, direct-attached storage. Journalling adds additional overhead that can result in slower overall performanceĥ.Apple File System (APFS), the default file system for Mac computers using macOS 10.13 or later, features strong encryption, space sharing, snapshots, fast directory sizing, and improved file system fundamentals. Journalling is a failsafe system that keeps a record of each operation before it is performed so that it can be traced back once a crash occursĤ.
Journalling is not exclusive to the Mac OS as there are also journalling options in other operating systemsģ. Question: Q: Mac OS Extended (Journaled, Encrypted) not available I have been reading a lot on getting usb drives encrypted with password on Mac OS and that it should be so easy.
Mac OS Extended(Journaled) is just the same as the first but with journalling turned onĢ. CPU and hard drive intensive activities like encoding videos can take a little bit longer to finish with journalling.ġ. Only power users would feel the impact of journalling on their system. The amount of performance hit that you take is rather small, especially if you are a casual user who uses a Mac for browsing the internet or creating documents. Saving and updating files that contain the list of operations take up some CPU cycles and some hard drive bandwidth. The bad side to journalling is that your operating system would usually take a hit due to the processing power that would need to be devoted to the journalling system itself.
This way, if it is interrupted somewhere in the middle, it can look back at the list and continue where it was interrupted. Journalling creates a list of operations that it is about to perform and checks them as they are done. Tracing these problems later on might take a long time due to the increasingly larger drives that are available today, that is why prevention might be the best overall solution. If a crash occurs before all the steps are completed, the end result might be cross-linked files, unusable sectors, or any other problem. A file operation as simple as deleting a file could be composed of two or more steps in order to ensure that everything is done properly. However, the two have their advantages and disadvantages in different aspects, such as speed, Time Machine selection, encryption, disk format, etc. The newer APFS indeed has improved some features based on Mac OS Extended.
Journalling is a failsafe method that prevents unwanted data abnormalities in the disk drive due to a system crash during the middle of a file operation. Both APFS and Mac OS Extended (HFS+ or macOS Journaled) are developed by Apple and used for Mac OS. Journalling is not exclusive to the Mac OS as other operating systems are also capable of having a journalling system. This operating system can either be journalled or not, each with its own pros and cons. The Mac OS Extended is a file system that is also known as HFS Plus. Mac OS Extended vs Mac OS Extended(Journaled)