![]() ![]() Partitionĭisk Arbitration probes each of the partitions on the disk, and runs fsck on them to determine the health of their file systems. Again, I’ll examine those in a later article. Encrypted APFS volumes are stored in the same layout, and are mounted in a similar process, although volume operations can only take place once the user has entered their password. disk5 contains a single APFS volume disk5s1.īootable external disks have a more complex structure within their APFS container I’ll examine mounting them in a later article. ![]() disk4s1 is a hidden EFI partition in MSDOS format.At the top level, disk4 is divided into two partitions, disk4s1 and disk4s2.In this case, I’ll consider a plain SSD formatted with a single APFS container and unencrypted volume. The diagrams used here provide the first two items, and a brief summary of the third.Īfter the hardware subsystems have established connection with the external disk through its interface and internal drivers, Disk Arbitration creates the new disk devices. A description of the activity undertaken and any result.The task-specific identity number, e.g.The descriptive name of the APFS task, which might refer to a code procedure, e.g.The message field of each log entry made by APFS has a standard structure: I’ve also matched these against the limited information provided in the APFS reference (last updated nearly three years ago), and here attempt to provide better insight into how APFS mounts the containers and volumes of an external disk. Since adding the feature in Mints 1.11 to obtain log extracts looking at APFS and how disks are mounted, I’ve been busy examining extracts for several different types of mount, and other procedures involving APFS. ![]()
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