RE: RMAN questions

> Can RMAN generate two sets of tapes in one pass of the backup? Say we
> needed one tape to stay on site and one to rotate off-site for Disaster
> Recovery purposes.

>I don't know of a way to make two copies at one pass. I would make a second
>copy using OS tools.

Parallel backup is possible with RMAN. There are two types of parallel backups.

1. One tape but more than one channels for parallel write.
2. More than one tape[or directory], each assigned to their own channel.

In your case, yes, you can copy/backup to more than one tape.

-Arun.
-----Original Message-----
From: Ruth Gramolini [mailto:rgramolini_at_tax.state.vt.us] Sent: Tuesday, November 28, 2000 12:35 PM To: Multiple recipients of list ORACLE-L Subject: Re: RMAN questions

I will give it a shot. See my attempts in line. ----- Original Message -----

>
> We are still working on the strategy to implement RMAN. Would appreciate
> any answers to these questions..
> thanks in advance!!
> Bruce
>
> What is the difference between a 'full backup' and a 'level 0 with
> restricted mode' backup, can the latter be used as to rebuild the database
> if I have the control file?

A full backup is the same as a level 0 but the latter can be used with subsequent incremental backups. Both can be used to recover. If you are using the contol file instead of a recovery catalog then you will need to have a copy of the controlfile at least.
>
> Can RMAN generate two sets of tapes in one pass of the backup? Say we
> needed one tape to stay on site and one to rotate off-site for Disaster
> Recovery purposes.

I don't know of a way to make two copies at one pass. I would make a second copy using OS tools.
>
> Is there a way to use a backup file created by RMAN if RMAN fails? I
> thinking of a potential situation where there is a bug in RMAN and we
can't
> do a restore/recovery. But if we had too we could go back to the level 0
> by replacing the data files Am I answering the first question I asked
> above

Rman is an executable and could be replaced from an OS backup. If there is a bug Oracle Support will help you.
>
> How does the backup speed to disk compare with tape? any experiences?
>
> I do all backups to tape but from previous discussion on the list backup
to disk is much faster. I put my backups on tape after they are done. This can be done with OS utilities and doesn't require a 3rd party media manager which putting backups directly to disc does require.

I hope the helps,
Ruth
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> INET: bruce.taneja_at_mcd.com
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Ruth Gramolini
  INET: rgramolini_at_tax.state.vt.us

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