Disk mapping for oracle ASM (Matty Sarro)

[Matty Sarro]

Please correct me if I am wrong, but I think you may be confusing the the
kernel library used to access the disks and the separate utilities used to
manage/configure the disks. They're separate things :) The management
utility marks the disks to be read/written to by the library, so it can die
and you should still have no problem accessing your data. Sort of like fdisk
could die, but you'd still be able to access your SATA and IDE drives
without any problem. It'd be easy to play with if you have a few minutes;
just kill the ASM service and see if your db dies or not :) I think you'll
be pleasantly surprised. Again, this is just with my cursory knowledge of
ASM so I could be wrong.
-Matty


On Mon, Dec 6, 2010 at 1:45 AM, raj sourabh <rajsourabh1 at gmail.com> wrote:

> Hi,
>
> Thanks for the information.
>
> But dont you think if oracleasm deamon/service is hung or stoppedon
> nodes then your whole database comes down. This was't the case with raw
> devices. Even though there is entry for it in /etc/init.d/rawdevices but in
> RHEL 5.5 you can not stop or start it :)
>
> Regards,
>
> Raj
>
> On Mon, Dec 6, 2010 at 6:35 AM, Yong Huang <yong321 at yahoo.com> wrote:
>
> > Regarding kernel upgrade and ASMlib upgrade, there may be an annoyance
> > to some people finding the correct ASMlib on Oracle OTN web site. It's
> > better to always go to
> > www.oracle.com/technetwork/topics/linux/index-101839.html#oracleasm_2_0
> > instead of search at otn.oracle.com. The search result may list multiple
> > pages that appear to have the libraries. But the first link points to
> > a page that may be missing the libraries while the page I showed above
> > has it.
> >
> > Once you installed with rpm, do:
> > /etc/init.d/oracleasm enable
> >
> > ASM is the future. Raw is deprecated.
> >
> > Yong Huang
> >
> >
> >
> >
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