I've created empty HFS+ filesystem represented by dmg image file. For security reasons I'd like to make sure every IO applies directly to the dmg file and not through any kind of memory in the middle.
Is there any way to cancel the option for read and write caching while mounting the filesystem? During my research about this theme, I've discovered that HFS+ header contain attributes field, and one of its containing bits in volume attributes field named kHFSVolumeNoCacheRequiredBit. It set if we want that blocks from this volume wouldn't not be cached, which is pretty much what I need. However, i don't have a clue about how to set it on. Any idea how to configure this volume properly (command-line, application, API, etc .. ) ? thanks, Irad
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