LoadDskF/SaveDskF - Revision history

Jsummers at 18:06, 17 March 2024

2024-03-17T18:06:05Z

Dexvertbot: /* Sample files */

2023-12-28T04:16:42Z

‎Sample files

J2j: Resources and more to Identification section

2022-05-19T03:09:08Z

Resources and more to Identification section

Sembiance: /* Sample files */

2021-09-13T20:17:34Z

‎Sample files

Jsummers: /* Software */

2021-08-25T01:14:19Z

‎Software

Jsummers: /* Software */

2021-07-27T17:08:51Z

‎Software

Jsummers at 19:55, 20 April 2021

2021-04-20T19:55:06Z

Jsummers: /* Format details */

2021-03-20T15:47:42Z

‎Format details

Jsummers at 18:32, 14 March 2021

2021-03-14T18:32:54Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Disk Image Formats |extensions={{ext|dsk}}, {{ext|1dk}}, {{ext|2dk}}, ... }} '''LoadDskF''' and '''SaveDskF''' are floppy disk imag..."

2021-03-12T21:08:36Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Disk Image Formats |extensions={{ext|dsk}}, {{ext|1dk}}, {{ext|2dk}}, ... }} '''LoadDskF''' and '''SaveDskF''' are floppy disk imag..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Disk Image Formats
|extensions={{ext|dsk}}, {{ext|1dk}}, {{ext|2dk}}, ...
}}
'''LoadDskF''' and '''SaveDskF''' are floppy disk imaging utilities by IBM. They have an associated file format, sometimes called '''DSK''' or '''SKF'''. The format was notably used for OS/2 service packs.

It most likely contains an image of a [[FAT12]] filesystem.

Some files are compressed. The compression scheme is some form of [[LZW]].

== Format details ==
The LoadDskF documentation says "all diskette sectors are written up to and including the highest occupied data sector". So, uncompressed files can probably be converted to raw [[FAT]]/[[IMA]] format by deleting the header, and appending padding if needed.

== Identification ==
Old format files start with bytes {{magic|0xaa 0x58}}.

New format uncompressed files start with {{magic|0xaa 0x59}}.

New format compressed files start with {{magic|0xaa 0x5a}}.

== Software ==
* [{{SACFTPURL|pack|diunpack.zip}} DIUNPACK Rel. 3.03] (1996-01-30) (OS/2 software)
* {{CdTextfiles|swextrav4/swextrav4-4/os2utilf/loaddf.zip|loaddf.zip}} - LoadDskF 1.16r (1993-01-14) and SaveDskF 1.14r (1992-05-26) - DOS and OS/2-compatible binaries; probably requires a floppy disk + drive.
* [http://www.os2site.com/sw/util/disk/floppy/dskxtr13.zip DSKXTRCT] - Exracts files (uncompressed disk images only) (OS/2 software)
* [http://www.os2site.com/sw/util/disk/floppy/dskdcmps.zip dskdcmps] - Decompresses compressed disk images (source code)
* {{CdTextfiles|swextrav4/swextrav4-4/os2utilf/makedskf.zip|MAKEDSKF}} - Utility for creating disk images (OS/2 software)

== Sample files ==
* {{CdTextfilesURL|hobbesos2/2_1/SERVPAK/}} - Old format
* https://archive.org/details/IBMOS22.11XR06200EnglishDiskettes -> "IBM OS2 2.11 - XR06200 - English - Diskettes.zip" → *.DSK - Examples of new format, uncompressed
* https://archive.org/details/OS2_Install_Disks → OS2_W3B-D1CD_2000-03-19.zip → DISK1.DSK - Example of compressed format

[[Category:IBM]]
[[Category:OS/2]]

@@ Line 103: / Line 103: @@
 * https://archive.org/details/IBMOS22.11XR06200EnglishDiskettes → "IBM OS2 2.11 - XR06200 - English - Diskettes.zip" → *.DSK - Examples of new format, uncompressed
 * https://archive.org/details/OS2_Install_Disks → OS2_W3B-D1CD_2000-03-19.zip → DISK1.DSK - Example of compressed format
-* https://telparia.com/fileFormatSamples/archive/ibmSaveDsk/
+* {{DexvertSamples|archive/ibmSaveDsk}}
 ==Resources==

@@ Line 81: / Line 81: @@
 * [http://www.os2site.com/sw/util/disk/floppy/dskxtr13.zip DSKXTRCT] - Exracts files (uncompressed disk images only) (OS/2 software)
 * [http://www.os2site.com/sw/util/disk/floppy/dskdcmps.zip dskdcmps] - Decompresses compressed disk images (source code)
-* {{Deark}} - Can extract files, convert to raw, decompress (based on dskdcmps)
+* {{Deark}} - Can convert to raw, decompress (based on dskdcmps), etc.
 * {{CdTextfiles|swextrav4/swextrav4-4/os2utilf/makedskf.zip|MAKEDSKF}} - Utility for creating disk images (OS/2 software)
-* [[7-Zip]] can often handle uncompressed LoadDskF files, using its generic support for FAT.
+* [[7-Zip]]'s support for FAT is robust enough that it can often handle uncompressed LoadDskF files.
 == Sample files ==

@@ Line 11: / Line 11: @@
 == Format details ==
-The LoadDskF documentation says "all diskette sectors are written [to the image file] up to and including the highest occupied data sector". So, uncompressed files can probably be converted to raw [[FAT]]/[[IMA]] format by deleting the header, and appending padding if needed.
+The LoadDskF documentation says "all diskette sectors are written [to the image file] up to and including the highest occupied data sector". So, uncompressed files can be converted to raw [[FAT]]/[[IMA]] format by deleting the header, and appending padding if needed.
 == Identification ==

@@ Line 7: / Line 7: @@
 It most likely contains an image of a [[FAT12]] filesystem.
 == Format details ==
@@ Line 68: / Line 66: @@
 number is 5AAAh, the data will be compressed using a 12-bit LZW scheme.
 </pre>
 == Identification ==

@@ Line 75: / Line 75: @@
 New format compressed files start with  {{magic|0xaa 0x5a}}.
 == Software ==
@@ Line 91: / Line 105: @@
 * https://telparia.com/fileFormatSamples/archive/ibmSaveDsk/
 [[Category:IBM]]
 [[Category:OS/2]]