Re: Oracle backup - RAC

From: DA Morgan <damorgan_at_exesolutions.com>
Date: Sun, 02 Mar 2003 12:39:24 -0800
Message-ID: <3E626BFC.7D3EBE6B@exesolutions.com>

Paul Drake wrote:

> DA Morgan <damorgan_at_exesolutions.com> wrote in message news:<3E5F9293.DA20AC87_at_exesolutions.com>...
> > "Howard J. Rogers" wrote:
> >
> > > On Fri, 28 Feb 2003 09:31:58 +0000, Mike wrote:
> > >
> > > > I have been told that if I have Oracle RAC on a Solaris platform (raw
> > > > partition) I HAVE to use RMAN for backup.
> > > >
> > > > Is this right?
> > >
> > > You don't *have* to, no. BUt unless you're a dab hand with dd, how do you
> > > propose copying the datafiles somewhere safe? RMAN is really a rather
> > > nifty tool when it comes to dealing with RAW.
> > >
> > > Regards
> > > HJR
> >
> > Many of my students are asking questions like "What is RAW", how does it
> > differ from the norm, how can I do it on my Windows/Linux/etc. machine.
> >
> > I am looking for a good resource to point them to as it is not part of the
> > curriculum and I have no time in my classes to add this material. Any
> > recommendations will be appreciated.
> >
> > Daniel Morgan

>

> Daniel,

>

> Back in the day of OPS, oracle provided info as to how to create raw
> partitions:
> http://download-west.oracle.com/docs/cd/A87860_01/doc/paraserv.817/a76934/chap2.htm#1000139

>

> <snip>
> Windows NT

>

> Windows NT does not support a true distributed file system. Therefore,
> data files, control files and redo log files reside on unformatted raw
> devices.

>

> An extended partition points to raw space on the disk that can be
> assigned multiple logical partitions for the database files.

>

> Because raw devices on Windows NT do not have a file name or drive
> letter associated with them like a regular file system, an extended
> partition is first created, which points to raw space on a disk.
> Multiple logical partitions are then created and assigned symbolic
> link names using the following format:

>

> \\.\symbolic_link_name.
> </snip>

>

> SuSE Linux has published a white paper on the lvm supplied with their
> distribution. Check page 20 for hints on raw files with Oracle.
> ftp://ftp.suse.com/pub/suse/i386/supplementary/commercial/Oracle/docs/lvm_whitepaper.pdf

>

> hth,

>
> Paul

Thanks.

Daniel Morgan Received on Sun Mar 02 2003 - 14:39:24 CST