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2. Core Storage - Wikipedia

   en.wikipedia.org/wiki/Core_Storage

   Core Storage is a logical volume management system on macOS that was introduced by Apple to Mac OS X Lion. Core Storage is a layer between the disk partition and the file system. [1] Core Storage is the basis for Apple's Fusion Drive technology, [2] which presents several partitions on multiple drives as a single logical volume.

3. Hard disk drive - Wikipedia

   en.wikipedia.org/wiki/Hard_disk_drive

   The Microsoft Windows family of operating systems uses the binary convention when reporting storage capacity, so an HDD offered by its manufacturer as a 1 TB drive is reported by these operating systems as a 931 GB HDD. Mac OS X 10.6 ("Snow Leopard") uses decimal convention when reporting HDD capacity. [120]

4. Fusion Drive - Wikipedia

   en.wikipedia.org/wiki/Fusion_Drive

   Fusion Drive remains available in subsequent models of these computers, but was not expanded to other Apple devices: the latest MacBook and Mac Pro models use exclusively flash storage, and while this was an optional upgrade for the mid-2012 non-Retina MacBook Pro discontinued by Apple, it replaced the standard hard disk drive in October 2021 ...

5. Hierarchical File System (Apple) - Wikipedia

   en.wikipedia.org/wiki/Hierarchical_File_System...

   HFS is also referred to as Mac OS Standard (or HFS Standard), while its successor, HFS Plus, is also called Mac OS Extended (or HFS Extended). With the introduction of Mac OS X 10.6 , Apple dropped support for formatting or writing HFS disks and images , which remained supported as read-only volumes until macOS 10.15 . [ 1 ]

6. Binary prefix - Wikipedia

   en.wikipedia.org/wiki/Binary_prefix

   Some programs and operating systems, such as Microsoft Windows, still use "MB" and "GB" to denote binary prefixes even when displaying disk drive capacities and file sizes, as did Classic Mac OS. Thus, for example, the capacity of a "10 MB" (decimal "M") disk drive could be reported as " 9.56 MB ", and that of a "300 GB" drive as "279.4 GB".

7. HFS Plus - Wikipedia

   en.wikipedia.org/wiki/HFS_Plus

   These features were accessible through the GUI, using the Disk Utility application in Mac OS X Server, but only accessible through the command line in the standard desktop client. [6] With Mac OS X v10.3, all HFS Plus volumes on all Macs were set to be journaled by default. Within the system, an HFS Plus volume with a journal is identified as HFSJ.