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storage

Which external disk?

Overall summary of a year’s testing external hard disks and SSDs ranging in cost from $50 to more than $200 per TB. Which is best?

November 23, 2022 Macs, Technology

Explainer: The arithmetic of snapshot size

T T Read More

A simple worked example showing the effect of snapshots and changes in hidden system files in consuming free space on APFS.

July 23, 2022 Macs, Technology

Explainer: Archiving isn’t backing up

Archiving is very different from backing up, from the storage media used to integrity checks. Here are pointers to help you preserve important documents.

June 25, 2022 Macs, Technology

Explainer: Error-correcting files

How to design a method which not only detects errors in file data, but enables them to be corrected? A tale of Hamming, Reed, Solomon and CDs.

June 4, 2022 Macs, Technology

Which are more reliable: hard disks or SSDs?

Two reasons for paying more and using SSDs are that they’re faster and more reliable. Data on failure and reliability don’t appear as clear as the ads, though.

June 2, 2022 Macs, Technology

Efficient resilient storage

Storage has to be reliable, efficient and resilient. However, efficiency and resilience oppose one another. What’s the best solution? New file formats, CRC in the file system, or what?

May 27, 2022 Macs, Technology

How much free space does an APFS disk need?

It depends whether you’re going to boot macOS from it, on the space required for snapshots, and how large they could become. And there’s more.

May 18, 2022 Macs, Technology

Last Week on My Mac: Do M2 Macs need better storage support?

Thunderbolt 5 isn’t available yet, and in any case will probably offer no more than 6 GB/s. So what is the way ahead for Apple in its successors to its M1 series chips?

May 1, 2022 Macs, Technology

Are Thunderbolt SSDs more consistent than USB?

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Armed with just a couple of flashy Thunderbolt NVMe SSDs and his home-made benchmarking app, we discover whether Thunderbolt is any better than USB 3.x.

April 28, 2022 Macs, Technology

Last Week on My Mac: Why M1 Macs don’t have full support for USB-C

M1 Macs don’t support SMART monitoring over USB-C, forcing us to choose between Full Security without SMART, or Reduced Security with SMART support.

April 10, 2022 Macs, Technology

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