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Stibium

Should you use Tahoe’s new ASIF disk images?

This new disk image format is claimed to be “efficient and general-purpose”. But is it? Is it as fast as sparse bundles or read-write (UDRW) disk images are?

September 17, 2025 Macs, Technology

More updates for Tahoe: Spotlight (Metamer, Spotcord), text obfuscation (Dystextia) and storage testing (Stibium)

Productivity improvements with metadata editing and cataloguing, fun with Unicode lookalikes, and measuring the performance of storage. All now for Big Sur to Tahoe.

July 8, 2025 Macs, Technology, Updates

Tune for Performance: Do you really need a big internal SSD?

T T Read More

Why pay an extra $600 for a 2 TB internal SSD, after all fast external SSDs are cheaper. Maybe you need to check whether disk performance becomes a rate-limiting factor.

December 12, 2024 Macs, Technology

Last Week on My Mac: Mac mini M4 Pro first impressions, cores and more

Set up from unboxing in under 2 hours, its CPU cores perform better than those in the M3, differences that are magnified.

November 10, 2024 Macs, Technology

Disk Images: Bands, Compaction and Space Efficiency

How do sparse bundles and read-write disk images compare with regard to their efficient use of disk space, and in maintenance requirements? Here are test results from Sequoia.

October 21, 2024 Macs, Technology

Disk Images: Performance

Sparse bundles (UDSB), read-write disk images (UDRW) and sparse images (UDSP) compared on two SSD, with and without container encryption.

October 16, 2024 Macs, Technology

How to evaluate an external SSD

Check its protocol support and expected maximum transfer rate, then whether it supports SMART indicators and Trims with APFS. Finally check its real-world performance.

February 24, 2024 Macs, Technology

Updates: Revisionist 1.9, Spundle 1.7, Stibium 1.1, Taccy 1.15 and UTIutility 1.3

For working with document versions, managing sparse bundles, benchmarking disk performance, checking TCC privacy protection, and looking up UTIs.

June 21, 2023 Macs, Technology, Updates

How well do USB 3 SSDs work on a Thunderbolt hub?

How well do USB 3.1 Gen 2 SSDs mix with Thunderbolt 3 SSDs when connected to the same Thunderbolt 4 hub?

April 18, 2023 Macs, Technology

How connecting your SSD to a Thunderbolt hub can slow it to a crawl

In the worst case, an expensive TB3 SSD with a regular write speed of 2.2 GB/s could only write at 400 MB/s when connected via a hub and contending with faster SSDs.

March 20, 2023 Macs, Technology

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