Re: O_DIRECT

[Devel <devel@integra-sc.it>]

Hi all,
how i can write data on a partition without a filesystem??

Saluti Carlo!

Il Tue, 20 Jul 2004 20:48:24 +0200
bert hubert <ahu@ds9a.nl> scrisse:

> On Tue, Jul 20, 2004 at 10:27:57AM -0700, Shesha Sreenivasamurthy wrote:
> > I am having trouble with O_DIRECT. Trying to read or write from a block 
> > device partition.
> > 
> > 1. Can O_DIRECT be used on a plain block device partition say 
> > "/dev/sda11" without having a filesystem on it.
> 
> As fas as I know, yes, but be aware that O_DIRECT requires page aligned
> addresses! (an integral of 4096 on most systems).
> 
> > 2. If no file system is created then what should be the softblock size. 
> > I am using the IOCTL "BLKBSZGET". Is this correct?
> 
> No idea what you mean - but see above about the aligned addresses.
> 
> > 3. Can we use SEEK_END with O_DIRECT on a partition without filesystem.
> 
> I see no reason why not. Good luck!
> 
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