SABDU - Revision history

Sembiance: /* Sample files */

2026-01-02T14:15:58Z

‎Sample files

Sembiance: /* Identification */

2026-01-02T14:14:58Z

‎Identification

Sembiance: /* Identification */

2026-01-02T14:14:11Z

‎Identification

RSola: Created page with "$1"

2025-10-09T13:36:07Z

Created page with "$1"

New page

{{FormatInfo
|formattype=electronic
|subcat=Disk Image Formats
|released=1991
|extensions={{ext|sdu}}
}}

'''SAB Diskette Utility''', also known as '''SABDU''', is a shareware disk utility for Windows 3.x. It was created by Stewart A. Berman.

== Identification ==

Disk image files start with the null-terminated ASCII string <code>SAB Diskette Utility</code> (hexadecimal {{magic|53 41 42 20 44 69 73 6b 65 74 74 65 20 55 74 69 6c 69 74 79 00}})<ref>[https://file-extension.net/seeker/file_extension_sdu File extension SDU details at File Extension Seeker]</ref>. A version number in the form of a null-terminated ASCII string (like <code>2.10</code>) comes next. It is unclear if this version number means the version of the program that created the file or if it tells apart variants of the file format.

== Software ==

* http://www.saberman.com/SABDU/ - Latest official version (2.92) from author's website
* [https://github.com/jfdelnero/HxCFloppyEmulator HxCFloppyEmulator] allegedly supports reading SDU image files<ref>https://github.com/jfdelnero/HxCFloppyEmulator/tree/main/libhxcfe/sources/loaders/sdu_loader</ref>.
* [https://github.com/keirf/flashfloppy FlashFloppy] can also read SDU image files<ref>https://github.com/keirf/flashfloppy/blob/master/src/image/img.c</ref>.
* [https://winimage.com/winimage.htm Winimage] and its companion tool [https://winimage.com/extract.htm Extract] claim support for SDU image files.

== Sample files ==

* {{DiscMasterURL|browse/38912/AST_DataDisc_UK6050d.iso/original/astdu}} → *.SDU
* SABDU distribution archives, which usually can be found on software compilations as SABDUxxx.ZIP, also include TEST0360.SDU, TEST0720.SDU, TEST1200.SDU and TEST1440.SDU image files since version 2.10.

== References ==

<references/>

@@ Line 11: / Line 11: @@
 Disk image files start with the null-terminated ASCII string <code>SAB Diskette Utility</code> (hexadecimal {{magic|53 41 42 20 44 69 73 6b 65 74 74 65 20 55 74 69 6c 69 74 79 00}})<ref>[https://file-extension.net/seeker/file_extension_sdu File extension SDU details at File Extension Seeker]</ref>. A version number in the form of a null-terminated ASCII string (like <code>2.10</code>) comes next. It is unclear if this version number means the version of the program that created the file or if it tells apart variants of the file format.
-According to <ref>[https://github.com/jfdelnero/HxCFloppyEmulator]</ref> you can just skip the first 46 bytes and treat the remainder of the file as a regular disk image.
+According to <ref>[https://github.com/keirf/flashfloppy/issues/95 Flash Floppy Issue #95 (SDU File Format)]</ref> you can just skip the first 46 bytes and treat the remainder of the file as a regular disk image.
 == Software ==

← Older revision		Revision as of 14:14, 2 January 2026
Line 11:		Line 11:

	Disk image files start with the null-terminated ASCII string <code>SAB Diskette Utility</code> (hexadecimal {{magic\|53 41 42 20 44 69 73 6b 65 74 74 65 20 55 74 69 6c 69 74 79 00}})<ref>[https://file-extension.net/seeker/file_extension_sdu File extension SDU details at File Extension Seeker]</ref>. A version number in the form of a null-terminated ASCII string (like <code>2.10</code>) comes next. It is unclear if this version number means the version of the program that created the file or if it tells apart variants of the file format.		Disk image files start with the null-terminated ASCII string <code>SAB Diskette Utility</code> (hexadecimal {{magic\|53 41 42 20 44 69 73 6b 65 74 74 65 20 55 74 69 6c 69 74 79 00}})<ref>[https://file-extension.net/seeker/file_extension_sdu File extension SDU details at File Extension Seeker]</ref>. A version number in the form of a null-terminated ASCII string (like <code>2.10</code>) comes next. It is unclear if this version number means the version of the program that created the file or if it tells apart variants of the file format.
		+	According to <ref>[https://github.com/jfdelnero/HxCFloppyEmulator]</ref> you can just skip the first 46 bytes and treat the remainder of the file as a regular disk image.

	== Software ==		== Software ==

@@ Line 21: / Line 21: @@
 == Sample files ==
+* {{DexvertSamples|archive/sabDisketteUtilityDiskImage}}
 * {{DiscMasterURL|browse/38912/AST_DataDisc_UK6050d.iso/original/astdu}} → *.SDU
 * SABDU distribution archives, which usually can be found on software compilations as SABDUxxx.ZIP, also include TEST0360.SDU, TEST0720.SDU, TEST1200.SDU and TEST1440.SDU image files since version 2.10.