On Wed, Jul 03, 2002 at 07:51:15PM +0200, Eike Kowallik wrote: > Hello! > > Hmm... nobody can give me a hint? Are my problems and my questions > so strange?? No, it is because we are all at the beach ;-) You are using a rather old LVM version. In case you can afford an upgrade to LVM 1, your problem will be gone. # raw -qa /dev/raw/raw1: bound to major 58, minor 0 dd if=/dev/raw/raw1 of=/dev/null bs=512 count=10 10+0 records in 10+0 records out Regards, Heinz -- The LVM Guy -- > > As I wrote everything works fine with real hard disk partitions > for the binding of the raw devices - but with logical volumes it > doesn't work anymore... :-( > > Bye, Eike > > > ----- Forwarded message from Eike Kowallik <E.Kowallik@tu-bs.de> ----- > > From: Eike Kowallik <E.Kowallik@tu-bs.de> > To: Linux LVM Mailinglist <linux-lvm@sistina.com> > > Date: Mon, 24 Jun 2002 04:29:08 +0200 > > > Hello! > > During the installation of a 2-node Oracle 9.0.1 cluster using both > lvm and raw devices I meet a problem that is independent of Oracle - > at least it seems to me like that... > > When I'm binding my raw devices used for Oracle to real hard disk > partitions everythings works fine. But with the binding to my created > logical volumes I'm receiving errors from Oracle. And I need more raw > partitions on the shared disk than Linux can support (due to the one > byte minor device number limit). In general I would like to have the > great flexibility of the lvm. ;-) > > So I tried to find out what the reason for the problem is and found > amongst other things the following threads: > > [linux-lvm] Using Oracle with lvm AND rawio: read(512) from /dev/raw/... > http://lists.sistina.com/pipermail/linux-lvm/2000-December/003730.html > > confused about raw-io blocksizes > Date: Fri Nov 09 2001 - 19:13:11 EST > http://www.uwsg.iu.edu/hypermail/linux/kernel/0111.1/0472.html > > [suse-oracle] ORA-27044 to create tablespace (Re: [suse-oracle] Raw device) > http://lists.suse.com/archive/suse-oracle/2002-Feb/0054.html > > > I tested to read 1k, 2k, 4k and 8k blocks from my raw devices, bound > to logical volumes - everything ok, here for the first raw device: > > $ dd if=/dev/raw/raw1 of=/dev/null bs=1k count=1000 > 1000+0 records in > 1000+0 records out > $ dd if=/dev/raw/raw1 of=/dev/null bs=2k count=1000 > 1000+0 records in > 1000+0 records out > $ dd if=/dev/raw/raw1 of=/dev/null bs=4k count=1000 > 1000+0 records in > 1000+0 records out > $ dd if=/dev/raw/raw1 of=/dev/null bs=8k count=1000 > 1000+0 records in > 1000+0 records out > > BUT with a block size of 512: > > $ dd if=/dev/raw/raw1 of=/dev/null bs=512 count=1000 > dd: reading `/dev/raw/raw1': Invalid argument > 0+0 records in > 0+0 records out > $ > > You will find the same error message in the threads above. And _all_ > the tests, even the one with a block size of 512 bytes, are running > instead _without_ any errors when the used raw devices are bound to > real disk partitions! > > I'm using stock Red Hat 7.1 with some changes made for the Oracle RAC. > My concrete problem is that I'm not able to find any concrete hint > about what to do. Do I need a newer lvm version? If so, which one? > Red Hat 7.1 comes with > > # grep -i lvm /var/log/messages.1 | tail -2 > Jun 14 22:26:08 linmi04 kernel: LVM version 0.9.1_beta2 by Heinz Mauelshagen (18/01/2001) > Jun 14 22:26:08 linmi04 kernel: lvm -- Module successfully initialized > > but without the lvm userland tools, so I installed the appropriate > version of them. > > Or is it (also) a kernel problem? I have to use a recent 2.4 kernel? > I needed (for the Oracle RAC) to compile the Red Hat kernel: > > $ rpm -q kernel-source > kernel-source-2.4.2-2 > > What's about lvm patches? According to PATCHES/README it shouldn't be > necessary for 2.4 kernels ("little more than update the lvm source files"). > And BLOCK_SIZE in lvm.h? In the thread of this mailing list from > December of 2000 (please have a look above) I couldn't find an answer. > > It's perhaps a little bit off topic here, but due to the certification > of Oracle 9.0.1 RAC for Red Hat 7.1 I'm interested in statements about > using lvm and raw devices (for Oracle RAC) with Red Hat kernels, too. > Perhaps I need just to upgrade to the Red Hat 2.4.9-34 kernel rpm's > (there is no newer one for Red Hat 7.1)... but I don't want to try > just something out, instead I would like to understand the problem - > and to apply a good solution then. ;-) > > Thanks in advance && bye, Eike > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html > > ----- End forwarded message ----- > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
