How to read a UUID to determine whether it’s supposed to be random, or has a specific meaning. Where you’ll find them, and whether you’ll ever see two the same.
APFS
Add another volume to your Mac’s internal SSD and try to eject it. All hell breaks loose as the Finder wants to eject the whole disk, it seems. Probably a 6-year old bug.
A survey of support for APFS, HFS+, FAT and ExFAT, NTFS, ZFS, Linux file systems, and MacFUSE with its potential for file systems running in user-space.
Trim enables an SSD to erase pages of unused memory so they’re ready for reuse. It saves time, and greatly improves write performance. How to the best out of Trim.
Study how the four key timestamps of a file change when you create, edit, preview the file, using Dropera.
Two confounding factors to take into account when interpreting timestamps on files: what updates the Last opened time, and access via QuickLook.
First Aid in Disk Utility, or fsck_apfs in Terminal, have given warnings or errors with id numbers. How do you work out which file or folder that refers to?
First Aid in Disk Utility, or running fsck_apfs in Terminal, return warnings or errors on one of your Mac’s volumes. Here’s what to do next.
How APFS is the first Mac native file system to have true inodes and inode numbers. What they are, and how you can use them in volume groups and different types of file link.
When the numbers simply don’t add up. How some extended attributes may be included in quoted file sizes, but others are ignored, and Sequoia hasn’t really changed this since Classic Mac OS of 25 years ago.
The Eclectic Light Company 