Amiga Old File System: Difference between revisions

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The DD disk has 11 * 2 * 80 = 1760 (0 to 1759) blocks, while the HD disk has 22 * 2 * 80 = 3520 blocks.
 
Amiga stores 880 [[kibibyte|KiB]] on a DD disk and 1760 KiB on an HD floppy disk.
 
The standard Amiga filesystem has an internal 32 bit wide offset parameter (unsigned). It tells where to start the read/write operation. The biggest size for an Amiga disk is therefore 2^<sup>32</sup> = 4 [[gibibyte|GiB]]. This limit was changed with Amiga OS 3.5 and 3.9 and now is 2^<sup>64</sup> = '''4 Exabyte'''[[exabyte]].
 
OFS Datablock stores Block Size BSIZE-24 bytes (i.e. normally 488 bytes at most frequently used BSIZE of 512 bytes), FFS stores BSIZE bytes (512 bytes per block).