My question is more complex: How i can write on a partition without a fs and after read them, or better: if i write 10 jpeg file on a partition without a fs how i can read them? Saluti Carlo! Il Wed, 21 Jul 2004 21:40:15 +0530 "Dhiman, Gaurav" <Gaurav.Dhiman@xxxxxx> scrisse: > > If in user space, write to had, hdb .... hdc files, it will write data > to HDD partition without going thru filesystem. > > If in Kernel space, use the driver interfaces used by had, hdb .... hdc > files. > > Regards, > Gaurav > > > -----Original Message----- > From: kernelnewbies-bounce@xxxxxxxxxxxx > [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of Devel > Sent: Wednesday, July 21, 2004 8:15 PM > To: bert hubert > Cc: shesha@xxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > kernelnewbies@xxxxxxxxxxxx > Subject: Re: O_DIRECT > > 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@xxxxxxx> 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! > > > > -- > > http://www.PowerDNS.com Open source, database driven DNS Software > > > http://lartc.org Linux Advanced Routing & Traffic Control > HOWTO > > - > > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
