How can you assure yourself that important files retain their data intact? Here’s a simple strategy for doing that, which works better on a file system that doesn’t check integrity.
integrity
Checksums and CRC can be very quick, but have significant drawbacks. SHA-256 hashes are best, although there are also error-correcting codes used in optical disks.
These updates feature overhauled windows, new app icons for compatibility with Tahoe, and have been rebuilt. LogUI gets a minor tweak that should improve its window controls in Tahoe.
Most could live with slight delays when launching major apps. But when they’re as long as 30 seconds, and it’s an Apple silicon Mac, an explanation is required.
SHA-256 hashes are used in code signatures and security as a means of identification and verification. They bring a substantial computational burden, and can be very slow in some Intel Macs. Plus a new version of Dintch for integrity checks.
APFS checks file system metadata, not file data. Consistency Scan has gone missing, verifying checksums doesn’t appear to verify data, and Verify Integrity seems to do something altogether different.
What are the performance differences between SHA-256 and 512? What throughput can you expect when checking hashes? And how to correct errors detected?
Since November 2020, every T2 and Apple silicon Mac that has booted Big Sur or later in Full Security mode has check the integrity of its 9 GB SSV.
From its outset, APFS hasn’t tested the integrity of file data stored on it. Would this be a good idea, or should macOS switch to the ZFS file system instead?
APFS has no feature to check file data integrity. Dintch and Fintch are two apps that tag files with SHA-256 hashes to address this. New versions.
The Eclectic Light Company 