Details: File format summary

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Properties

Summary
Name	A2R Disk Image File
Version	3
Other names
Identifiers	PUID: fmt/2058 Library of Congress Format Description Identifier: Q128123326
Family
Classification	Presentation
Disclosure
Description	The A2R disk image format provides a detailed, low-level capture of the contents of Apple II and early Macintosh disks. Due to its comprehensive nature, A2R files are significantly larger than other formats like the WOZ disk image format, which aim to replicate only the data originally written to the disk. Instead, A2R captures the raw magnetic patterns of the disk, making it easier to work with old, barely readable disks, although it requires further processing to extract the original data.
Orientation
Byte order
Related file formats	None.
Technical Environment
Released
Supported until
Format Risk
Developed by	None.
Supported by	None.
Source	Brigham Young University / Brigham Young University
Source date	21 Jul 2025
Source description	v.121: new PUID.
Last updated	21 Jul 2025
Note	https://applesaucefdc.com/a2r/ http://fileformats.archiveteam.org/wiki/A2R_disk_image Submission: https://github.com/digital-preservation/PRONOM_Research/tree/42a05f69926447c3eca228595d0d85c5c6fdae2b/Submissions/Complete/AppleSauce