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LargeFilesystem

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LargeFilesystem

README.md

LargeFilesystem - Filesystem with 64 character filenames and 4 KB sectors

Description

Oberon's original filesystem with its limits (64 MB filesystem size, ~3 MB file size) is well-suited for small files. But when removing the limits, performance for large files is pretty bad. Also, 32 character long file names (including the terminating 0X) are sometimes too limited.

This modification provides an example on how to increase the sector size to 4 KB, file name length to 64 characters, while also increasing the size of internal structures (128 extended entries per file header). These values are by no means optimal; they serve as example values. If you want to use different values, it should suffice to recalculate some values (e.g. number of directory entries per sector or header size) and migrate the filesystem again.

It also provides a way, with the help of an intermediate MinimalFileystem, to migrate data from the original filesystem to the large one. Patches to only use it as a minimal filesystem are also provided.

Installation

  • In case your filesystem image is larger than 4MB, delete some files and defragment it.

  • Apply LargeFileystem.patch to Kernel.Mod, FileDir.Mod, Files.Mod, System.Mod and ORL.Mod.

  • Apply LargeIntermediateFilesystem.patch to a copy of the (already patched) FileDir.Mod, naming the copy FileDirI.Mod.

  • Push the changed files along with MigrateFilesystem.Mod.txt.

  • Compile MigrateFilesystem.Mod and load it:

    ORP.Compile MigrateFilesystem.Mod/s ~
MigrateFilesystem.Load ~

  • Recompile the changed modules and rebuild the whole system (including the compiler):

    ORP.Compile Kernel.Mod/s FileDirI.Mod/s Files.Mod/s Modules.Mod/s ~
ORL.Link Modules ~
ORL.Load Modules.bin ~

ORP.Compile Input.Mod/s Display.Mod/s Viewers.Mod/s ~
ORP.Compile Fonts.Mod/s Texts.Mod/s ~
ORP.Compile Oberon.Mod/s ~
ORP.Compile MenuViewers.Mod/s ~
ORP.Compile TextFrames.Mod/s ~
ORP.Compile System.Mod/s ~
ORP.Compile Edit.Mod/s ~
ORP.Compile ORS.Mod/s ORB.Mod/s ~
ORP.Compile ORG.Mod/s ORP.Mod/s ~
ORP.Compile ORL.Mod/s ~

  • Migrate the filesystem:

    MigrateFilesystem.Migrate ~

  • Restart the system. (The filesystem will be converted back to normal on boot).

  • Optionally, recompile the system again, using FileDir.Mod instead of FileDirI.Mod.