Support for large image filesystem discs
4 posts, 4 voices
Andrew Hodgkinson (6)
465 posts
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James Peacock (34)
19 posts
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Bit of a big one this. It would be really nice to be able to plug non-filecore USB discs or music players in, and be able to use them, rather than the machine hanging. I suppose this would require, at the least, support for large file offsets in FileSwitch, FileCore and DOSFS. |
Rob Kendrick (86)
50 posts
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James Peacock (34) wrote: > I suppose this would require, at the > least, support for large file offsets in FileSwitch, FileCore and > DOSFS. I'd advocate a complete reworking of RISC OS's file handing, from device drivers to VFS to actual filing system. It's currently a complete mess. |
Ben Avison (25)
445 posts
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James Peacock (34) wrote: > Bit of a big one this. It would be really nice to be able to plug > non-filecore USB discs or music players in, and be able to use them, > rather than the machine hanging. I suppose this would require, at the > least, support for large file offsets in FileSwitch, FileCore and > DOSFS. As you have guessed, the direct cause of this problem is the file size limit, because internally the disc image is presented to DOSFS as an image file. FileCore actually has a file size limit of 2 GiB at present, which kicks in before the 4 GiB limit imposed because FileSwitch only has 32-bit file pointers. It's pretty much impossible to find USB hard discs this small. At a pinch, it's possible to shrink the partition down to 2 GiB, but that's a far from ideal solution, I'm sure you'll agree. A sticking-plaster solution that's been suggested is to change the interface to DOSFS to use multiple files, each of < 2 GiB. But in the longer term, it's certainly desirable to support big files in their own right, if only to be able to hold things like DVD ISO images. |
