Re: Backups on raw devices

Michael,
 We use RMAN on RAW with EDM (EMC) backups, without any problem. When using RMAN, it will take care of all blocks that are being changed while the backup is going on. Also as EDM interfaces with the Tape library, RMAN will write directly to the Tape . Have this set up on about 15 databases and all of them are working fine. But occasionally our backups fail on 8.1.6 databases due to lack of resources on the Server (and some bugs!).

Rama

"Jenkins, Michael" wrote:

> We have parallel server running on on a Sun Cluster 2.2 and we are looking
> for the easiest way to perform hot backups. Now, I know that you have to
> use the "dd" command and skip the header at the beginning. Everything I
> read on metalink indicates that you can use basically the same paradigm as a
> hot backup on cooked file systems. But, the sysadmins here tell me that the
> raw device can't be backed up if there is any write activity on the data
> file that is currently being backed up. Now we all know that contrary to
> popular belief there is write activity on a data file even when the
> tablespace is in backup mode. Is "rman" or some other block-level backup
> utility the only way to get a reliable hot backup on raw devices? Does
> anybody have any experience with hot backups that are made while the
> database still has active users logged in?
>
> I look forward to everyone's thought on this.
>
> Thanks.
>
> Michael L. Jenkins
> Oracle Certified DBA
> Nextel Communications
> Norcross, GA
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Jenkins, Michael
> INET: Michael.Jenkins_at_nextel.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
> --------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).
Received on Fri Jun 15 2001 - 20:03:31 CDT