Messages in this thread | | | Date | Thu, 24 Jun 1999 15:44:47 +0200 | From | Matthew Wilcox <> | Subject | Re: direct (unbufferd) disk access |
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On Thu, Jun 24, 1999 at 11:35:56AM +0200, Christian Hammers wrote: > Hello List > > How can I get the kernel to read/write some data immediately to disk without > caching it in the kernel memory. > > I like to access one harddrive with two motherboards and like to have a shared > partition that will be writen to by one motherboard and read by an other > motherboard - but Linux seems to prevent that. > > I don't like to mount any partition (because of the filesystem check warnings) > and will instead write raw data with "dd". > Oh, and I don't like to flush ALL buffers, because this computer will be a > redunant web-server that strongly needs buffers (for this reasons AFAIK I > can't use flushb and sync).
You want Stephen Tweedie's raw IO patches.
ftp://ftp.uk.linux.org/pub/linux/sct/fs/raw-io
-- Matthew Wilcox <willy@bofh.ai> "Windows and MacOS are products, contrived by engineers in the service of specific companies. Unix, by contrast, is not so much a product as it is a painstakingly compiled oral history of the hacker subculture." - N Stephenson
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