RMAN BACKUP ERROR in TAPE

Dear Friends,
I am taking a RMAN BACKUP of ORACLE 9i with AIX4.3 with TAPE DRIVE
When i execute the script
RMAN> RUN{
allocate channel c1 type 'SBT_TAPE';
backup tablespace users;
It gets struckup for more than two hours it didn't prompt any errors.
allocated channel: c1
channel c1: sid=13 devtype=SBT_TAPE
channel c1: MMS Version 2.2.0.1
Starting backup at 11-APR-02
channel c1: starting full datafile backupset
channel c1: specifying datafile(s) in backupset
input datafile fno=00007 name=/gloqm/oradata/ORA9011/users01.dbf
channel c1: starting piece 1 at 11-APR-02
LSM was intalled, Is it right to mention the tape is 'SBT_TAPE' or i will have to mention something different.
Could any one help
Thanks in Advance
gandhi

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Similar Messages

RMAN Backup error with Symantec Backup Tool

Hi
My Environment
OS Windows server 2003 R2
Oracle 10G R2 10.2.03 2 node RAC
When i am taking backup maually in the command prompt with RMAN, it is successful, but when we are trying from Symantec Backup tool we are getting errors like
RMAN 03002 failur of Backup lus archivelog is problem,
RMAN 10015 error compiling PL/SQL programme
RMAN 10033 error during compilation of job step2
Ora 00603 Oracle server session terminate by fatal error.
Ora 004030 out of process memory when trying to allocate 4120 bytes(pl/sql) MPCODE,BAMMA, BAM Buffer)
So please tell me why its giving the error with Symatntec and why when i am doing manually it is successfull.
What could be the solution, please we are taking daily and weekly backups with Symantec on HP tape library. Please suggest me to the needful.
Immediate reply highly apperciated
Thanks
Edited by: 873393 on Apr 17, 2012 10:09 AM

Hello,
Ora 00603 Oracle server session terminate by fatal error.
Ora 004030 out of process memory when trying to allocate 4120 bytes(pl/sql) MPCODE,BAMMA, BAM Buffer) The ORA-04030 error message is interesting. It means that the OS doesn't have enough memory for Oracle.
So you may monitore the Memory usage of the Server during the Symantec Backup, and check for any activity. May be the Symantec Backup runs when other Batch Jobs use already a lot of memory . You may also have to extend the RAM of the Server.
Also, check for the RMAN script used by Symantec and compare with the "manual" script. May be, some options are used with Symantec and consume more resources on the Server.
Hope this help.
Best regards,
Jean-Valentin

RMAN backup error in R&D Server

friends,
OS: RHEL 4.8
DB: 10gR2
i am doing some R&D in my 10g test db....
i deleted the last archive log file...then i tried to do rman backup plus archivelog all;
but i am getting an error...then i copy the deleted file in the same location...then the backup is working fine...
suppose if this situation comes in production db what should i do....am i have to wait for the next archive log generation or i have to alter system switch log file;
thanks

Hi,
RMAN>change archivelog all crosscheck;
If below error commes then Your options are either to restore the missing file(s), or to perform a crosscheck. To perform a crosscheck,
run the above command from within RMAN
It is advisable to perform a full backup of the database at this point.
When an archive log crosscheck is performed, RMAN checks each archive log in turn to make sure that it exists on disk (or tape).
Those that are missing are marked as unavailable. If you have got missing logs, this won't bring them back. It will allow you to get
past this error and back-up the database though.
Regards

Rman backup on TEVOLI tape

Hi,
Can anybody help me.TSM tape configured for linux RAC oracle database for rman backups.once i start backup its giving me followng error.can anybody provide me help
Recovery Manager: Release 10.2.0.1.0 - Production on Fri Aug 18 20:49:36 2006
Copyright (c) 1982, 2005, Oracle. All rights reserved.
RMAN> connect target;
connected to target database: IPO (DBID=1999149714)
RMAN> BACKUP DATABASE PLUS ARCHIVELOG;
Starting backup at 18-AUG-06
current log archived
using target database control file instead of recovery catalog
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 08/18/2006 20:50:19
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27000: skgfqsbi: failed to initialize storage subsystem (SBT) layer
Linux Error: 2534: Unknown system error
Additional information: 7011
ORA-19511: Error received from media manager layer, error text:
SBT error = 7011, errno = 2534, sbtopen: system error
RMAN>

Possible solution is:
The default path where TDPO looks at is '/usr/tivoli/tsm/client/api/bin64'
even if the file DSM.SYS exists in another directory.
The read permission of the file '/usr/tivoli/tsm/client/api/bin64/dsm.sys'
was incorrect:
-rw-r----- i.e. "OTHERS" which is Oracle isn't allowed to read the
file /usr/tivoli/tsm/client/api/bin64/dsm.sys
After changing permissions on /usr/tivoli/tsm/client/api/bin64/dsm.sys in order
to allow oracle to use it then the backup works fine.
$ chmod +r /usr/tivoli/tsm/client/api/bin64/dsm.sys
The problem is on the TSM side. If the solution does not work you have to check TSM logs for further error messages.
Werner

Restore spfile from rman backup ---- error.

Hi,
I am trying to execute recovery on new machine ...
I have done the following steps..
I have one database as ora10g2 as peroduction database on one machine as hosta
I have created a catalog on another machine cora10g2 (hostb)
I have taken a full backup from hosta as per following ...
the following command execute from hosta machine.
$ rman target sys/<passwd>@ora10g2 catalog rman/rman@cora10g2 ...
Backup completed ...
Now I am trying to restore this backup on hostb machine where i have already rman catlog database ..
I have done the following setting ...on host b
set oracle_sid=DUP
and execute following command ...
rman target / catalog rman/rman@cora10g2
RMAN> set dbid 2760732370
executing command: SET DBID
database name is "BAAN10G2" and DBID is 2760732370
RMAN>
RMAN>
RMAN> startup force nomount ;
startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/oracle/dbs/baan10g2/dbs/initbaan10g2.ora'
starting Oracle instance without parameter file for retrival of spfile
Oracle instance started
Total System Global Area 159383552 bytes
Fixed Size 1977112 bytes
Variable Size 67114216 bytes
Database Buffers 83886080 bytes
Redo Buffers 6406144 bytes
RMAN>
RMAN>
RMAN>
RMAN> show all ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/rman/backup/control/cntrl_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 4 BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/baanora3/rman/ora10g2/bkup_db_%d_s%s_P%p_t%t' MAXPIECESIZE 1024;
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
RMAN>
RMAN>
RMAN> list backup of spfile ;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
2420 Full 7.33M DISK 00:00:01 14-JUN-07
BP Key: 2426 Status: AVAILABLE Compressed: NO Tag: TAG20070614T182935
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070614-00
SPFILE Included: Modification time: 14-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2509 Full 7.33M DISK 00:00:01 15-JUN-07
BP Key: 2515 Status: AVAILABLE Compressed: NO Tag: TAG20070615T130416
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-00
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2694 Full 7.33M DISK 00:00:01 15-JUN-07
BP Key: 2739 Status: AVAILABLE Compressed: NO Tag: TAG20070615T131703
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-01
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2760 Full 80.00K DISK 00:00:01 15-JUN-07
BP Key: 2763 Status: AVAILABLE Compressed: NO Tag: TAG20070615T163437
Piece Name: /rman/spfile/spfile.ora
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2769 Full 7.33M DISK 00:00:02 15-JUN-07
BP Key: 2771 Status: AVAILABLE Compressed: NO Tag: TAG20070615T163441
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-02
SPFILE Included: Modification time: 15-JUN-07
RMAN>
RMAN>
RMAN> restore spfile from autobackup ;
Starting restore at 19-JUN-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=36 devtype=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: sid=35 devtype=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: sid=34 devtype=DISK
allocated channel: ORA_DISK_4
channel ORA_DISK_4: sid=33 devtype=DISK
channel ORA_DISK_1: looking for autobackup on day: 20070619
channel ORA_DISK_1: looking for autobackup on day: 20070618
channel ORA_DISK_1: looking for autobackup on day: 20070617
channel ORA_DISK_1: looking for autobackup on day: 20070616
channel ORA_DISK_1: looking for autobackup on day: 20070615
channel ORA_DISK_1: looking for autobackup on day: 20070614
channel ORA_DISK_1: looking for autobackup on day: 20070613
channel ORA_DISK_1: no autobackup in 7 days found
channel ORA_DISK_2: looking for autobackup on day: 20070619
channel ORA_DISK_2: looking for autobackup on day: 20070618
channel ORA_DISK_2: looking for autobackup on day: 20070617
channel ORA_DISK_2: looking for autobackup on day: 20070616
channel ORA_DISK_2: looking for autobackup on day: 20070615
channel ORA_DISK_2: looking for autobackup on day: 20070614
channel ORA_DISK_2: looking for autobackup on day: 20070613
channel ORA_DISK_2: no autobackup in 7 days found
channel ORA_DISK_3: looking for autobackup on day: 20070619
channel ORA_DISK_3: looking for autobackup on day: 20070618
channel ORA_DISK_3: looking for autobackup on day: 20070617
channel ORA_DISK_3: looking for autobackup on day: 20070616
channel ORA_DISK_3: looking for autobackup on day: 20070615
channel ORA_DISK_3: looking for autobackup on day: 20070614
channel ORA_DISK_3: looking for autobackup on day: 20070613
channel ORA_DISK_3: no autobackup in 7 days found
channel ORA_DISK_4: looking for autobackup on day: 20070619
channel ORA_DISK_4: looking for autobackup on day: 20070618
channel ORA_DISK_4: looking for autobackup on day: 20070617
channel ORA_DISK_4: looking for autobackup on day: 20070616
channel ORA_DISK_4: looking for autobackup on day: 20070615
channel ORA_DISK_4: looking for autobackup on day: 20070614
channel ORA_DISK_4: looking for autobackup on day: 20070613
channel ORA_DISK_4: no autobackup in 7 days found
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 06/19/2007 18:00:13
RMAN-06172: no autobackup found or specified handle is not a valid copy or piece
RMAN>
I am not able to restore spfile from rman backup ;;;

Hi,
I would like to know few things
1. How are you setting the db_name ? you can set db_id at RMAN, how are you setting the db_name ?
2. Do you have any default init file at default location ? if yes, is the db_name parameter set correctly in that file ?
Since spfile is yet to be restored, you must set the db_name parameter correctly before you start spfile restore.This can be done with init file at default location which can even contain just one paremeter i.e db_name.

RMAN Backup error:ORA-04030: out of process memory

Hi,
Our RMAN backup is failing with below error:
===========================
RMAN-03002: failure of backup plus archivelog command at 05/22/2010 05:31:33
ORA-04030: out of process memory when trying to allocate 82444 bytes (pga heap,control file i/o buffer)
=============================
Please suggest
Thanks and Regards

We upgrade our catalog database(Linux) to 10.2.0.4 and our target database is 10.2.0.3(Windows),
we executed upgrade catalog twice and then when we again tried to execute the below command
rman sys/syspwd@targetdb catalog rman/rman@rmancat
Recovery Manager: Release 10.2.0.4.0 - Production on Sat May 22 15:10:36 2010
Copyright (c) 1982, 2007, Oracle. All rights reserved.
PL/SQL package SYS.DBMS_BACKUP_RESTORE version 10.02.00.03 in TARGET database is not current
PL/SQL package SYS.DBMS_RCVMAN version 10.02.00.03 in TARGET database is not current
connected to target database: WEBCT (DBID=3699379059)
connected to recovery catalog database
RMAN>
=======================
Still we are getting this error
and our backup falied with below errors:
======================
PL/SQL package SYS.DBMS_BACKUP_RESTORE version 10.02.00.03 in TARGET database is not current PL/SQL package SYS.DBMS_RCVMAN version 10.02.00.03 in TARGET database is not current connected to target database: WEBCT (DBID=3699379059) connected to recovery catalog database
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 05/22/2010 15:09:44
ORA-06550: line 1, column 14:
PLS-00306: wrong number or types of arguments in call to 'VALIDATEARCHIVEDLOG'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
==========================
Please suggest

Rman backup errors..

hi guru's
please tell me the answeres..for this
what will happen if we re run the Rman backup due to the job failure...will take a new backup from the begining? or will start from the first backup end where it left ?
i am deleting some archieved logs on the archieved destination before takeing the RMAN backup, and then running rman backup ...then any error will raised for the missing files during Rman archive log backup for missing files? i have the files like 1 to 10 ...in that 5 and 6 logs are deleted before takeing the Rman backup..how to resolve this?

user13014926 wrote:
hi guru's
please tell me the answeres..for this
what will happen if we re run the Rman backup due to the job failure...will take a new backup from the begining? or will start from the first backup end where it left ?
You can continue backup from which files not backed up and this is call restartable backup.Please refer below link
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1.htm#i1008543
>
i am deleting some archieved logs on the archieved destination before takeing the RMAN backup, and then running rman backup ...then any error will raised for the missing files during Rman archive log backup for missing files? i have the files like 1 to 10 ...in that 5 and 6 logs are deleted before takeing the Rman backup..how to resolve this?If you manually delete archivelogs then you will get an error so before executing this backup command you have to execute CROSSCHECK ARCHIVELOG ALL and DELETE EXPIRED ARCHIVELOG ALL then your problem will solve.

Rman backup error

Hi,
I am taking the rman backup i got below error please give me the solution.
Starting backup at 13-DEC-12
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=33 devtype=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: sid=50 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=/u01/oracle/oradata/dev/system01.dbf
input datafile fno=00002 name=/u01/oracle/oradata/dev/undotbs01.dbf
channel ORA_DISK_1: starting piece 1 at 13-DEC-12
channel ORA_DISK_2: starting full datafile backupset
channel ORA_DISK_2: specifying datafile(s) in backupset
input datafile fno=00003 name=/u01/oracle/oradata/dev/sysaux01.dbf
channel ORA_DISK_2: starting piece 1 at 13-DEC-12
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 12/13/2012 12:05:14
ORA-19504: failed to create file "/u03/rmbackp/1gnsomrp_1_1"
ORA-27040: file create error, unable to create file
Linux Error: 2: No such file or directory
channel ORA_DISK_1 disabled, job failed on it will be run on another channel
my mount point has 777 oracle:dba /u03/rmbackup . Below is the my rman configuration parameters.
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP OFF;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/u03/rmbackup/%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 2 BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
CONFIGURE CHANNEL 1 DEVICE TYPE DISK FORMAT'/u03/rmbackp/%U';
CONFIGURE MAXSETSIZE TO UNLIMITED;
CONFIGURE ENCRYPTION FOR DATABASE OFF;
CONFIGURE ENCRYPTION ALGORITHM 'AES128';
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE;
CONFIGURE SNAPSHOT CONTROLFILE NAME TO'/u03/rmbackup/snapcf_dev.f';
CONFIGURE RETENTION POLICY TO REDUNDANCY 2;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP OFF;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/u03/rmbackup/%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 2 BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1;
CONFIGURE CHANNEL 1 DEVICE TYPE DISK FORMAT'/u03/rmbackp/%U';
CONFIGURE MAXSETSIZE TO UNLIMITED;
CONFIGURE ENCRYPTION FOR DATABASE OFF;
CONFIGURE ENCRYPTION ALGORITHM 'AES128';
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE;
CONFIGURE SNAPSHOT CONTROLFILE NAME TO'/u03/rmbackup/snapcf_dev.f';

Did you see error :
ORA-19504: failed to create file "/u03/rmbackp/1gnsomrp_1_1"
ORA-27040: file create error, unable to create file
Linux Error: 2: No such file or directoryThere haven't directory : /u03/rmbackp and Channel 1 device type disk format is showed : /u03/rmbackp/%U
Error there.
Mahir

Rman backup error in 10g rac

hi,
I am backup 10g rac with rman,but there is some error when backup:
input datafile fno=00006 name=+DG1/orcl/datafile/undotbs3.265.623622323
channel c3: starting piece 1 at 13-JUN-07
RMAN-03009: failure of backup command on c1 channel at 06/13/2007 08:40:50
ORA-19504: failed to create file "/oracle/rman/db_ORCL_20070613_0fik5ji0_1_1_L0"
ORA-27040: file create error, unable to create file
Linux Error: 2: No such file or directory
channel c1 disabled, job failed on it will be run on another channel
RMAN-03009: failure of backup command on c3 channel at 06/13/2007 08:40:51
ORA-19504: failed to create file "/oracle/rman/db_ORCL_20070613_0hik5jna_1_1_L0"
ORA-27040: file create error, unable to create file
Linux Error: 2: No such file or directory
channel c3 disabled, job failed on it will be run on another channel
released channel: c1
released channel: c2
released channel: c3
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of release command at 06/13/2007 08:49:22
RMAN-06012: channel: c1 not allocated

Hi all I have the same problem. We have a 2 node rac with ASM. The archives goes to ASM. I would like to backup the archives from ASM to a filesystem. But i was given a filesystem that is only mounted on one node and it is not accessbile to the other node. When i run the following rman command i get the error on one of the channel that connect to node 2.
My question:
Can i use on channel that is connecting to node1 to backup all the archivelogs generated by node1 and node2 aswell since both the nodes have access to archive logs.
Please assist.
connect target /
connect catalog rmanrep/[email protected]
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/opt/oracle/archive/orcl/rman/cf_%d_%T_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 2;
CONFIGURE CHANNEL 1 DEVICE TYPE DISK CONNECT 'SYS/oass@orcl1;
CONFIGURE CHANNEL 2 DEVICE TYPE DISK CONNECT 'SYS/oass@orcl2';
BACKUP CURRENT CONTROLFILE;
backup archivelog all format '/opt/oracle/archive/orcl/arch_bkup/%d_AL_%T_%u_s%s_p%p' delete input;
EXIT;
RMAN-03009: failure of backup command on ORA_DISK_2 channel at 03/17/2009 21:00:25
ORA-19504: failed to create file "/opt/oracle/archive/orcl/arch_bkup/SPTDEV_AL_20090317_2kka60j6_s84_p1"
ORA-27040: file create error, unable to create file
Linux-x86_64 Error: 2: No such file or directory
channel ORA_DISK_2 disabled, job failed on it will be run on another channel
Thanks
Kart

RMAN Backup Restore from tape

Hello Gurus
We have lvl0 RMAN database backup restored from tape but due to some reasons we could not apply recovery on it. On checking the information in controlfile, it identified only the system file and no other file. So, we recreated the controlfile and decided to recover using backup controlfile option (until cancel or until change or until time). However, to my surprise, when I listed the checkpointchange# and checkpoint_time columns of v$datafile_header, I found the difference in timestamps ranging 24 hrs -- which menat we had to apply 24 hrs of archiving to bring all dbfs to a consistent state (before it allowed us to open the db) -- so far so good, it worked that way.
My question is that, while I trigger a lvl0 RMAN backup at say 4PM on 27th July and it finishes on 4PM on 28th July (as I am directly pushing around 1 TB data to tapes) -- what is the consistency timestamp of this backup. In other words, is this backup available for a restore of 4PM 27th July? Or is it available only for a restore of 4PM 28th July and later ...?
Isn't it that RMAN works at block level and when I fire a backup it should give me all the dbf's of that timestamp..?
Appreciate your inputs/comments.

When taking a online backup with RMAN, the datafiles backup is always inconsistent because it needs the archived redo logs generated during the backup to be consistent: http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/intro005.htm#sthref70.
A full online backup can only be used to restore the database to a point in time starting after backup end: if a backup starts at 4PM on 27th July and it finishes on 4PM on 28th July you can use it to restore the database to a point in time after 28-JUL 4PM.

RMAN backup compression and tape hardware compression

Hello,
Should tape backup compression be ON and RMAN compression OFF? What is the correct Oracle answer?
Common knowledge says that if both hardware and software compression were allowed to be enabled at the same time the resulting file in some cases may actually be bigger than the original file. Hardware data compression is done by specialized chips and faster than software compression and increases the tape performance.
I was reading somewhere some time ago that tape hardware will actually not attempt to compress data if the the data being processed cannot be compressed any further. But even if this is a hoax, wouldn't rman compression, at the cost of CPU, save I/O bandwidth?
Thanks.
Edited by: MaC on Dec 19, 2010 4:00 PM

MaC wrote:
I just located Oracle document ID 1018242.1, which outlines:
Use either hardware or software compression, but NOT both. Using both will actually increase the size of the resulting file. The rule of thumb is: compression + compression = no_compression.
Sounds kind a logic.I was actually going to post the same sentence but you did find it on your own :) . Another thing which is worth to mention that from 11.2, the RMAN backup compression is licensed with 4 options, High, Medium and Low . These all three options requires you to have Advanced Compression License to buy. There is another 4th option, Default which is free from license and the compression ratio of that lies in between of Medium and Low.
HTH
Aman....

RMAN : Backup to a tape.

Hi every Body,
I need please help on how to backup to a tape.
Exactly how to configure the MML interface ?

You can consider Oracle Secure Backup or a vendor from Oracle Backup Solutions Program.
Check Configuring RMAN to Make Backups to a Media Manager for configuration of RMAN and the vendor specific documentation for the media management configuration.

Rman backup error: ORA-19502

I am running a rman backup script with incremental 1 level as
backup as backupset incremental level 1 cumulative device type disk tag 'Baan_bkup$LEVEL_0' database;
recover copy of database;
backup device type disk tag 'Baan_bkup$LEVEL_0' archivelog all not backed up;
backup archivelog until time 'sysdate-6' delete all input;
delete noprompt obsolete device type disk;
It has run almost two weeks and last night it showed this error and failed
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 11/08/2006 03:02:14
ORA-19502: write error on file "/dbrecovery/flashback/goi1rkdm_1_1", blockno 164865 (blocksize=8192)
ORA-27072: File I/O error
Additional information: 4
Additional information: 164865
Additional information: 782336
Linux Error: 2: No such file or directory
I checked the df -k and I still have about 6% space in my /dbrecovery disk, a separated space, and I did not find the file indicated either. So was still possible the space is full? or others reason?
I used the "delete obsolete"command in rman but nothing can be deleted.

It seems your filesystem cannot handle large files (> 2G). Use 'maxpiecesize' option of 'allocate channel' command to limit the filesize.
Werner

RMAN Backup Direct To Tape

Hi,
Can anyone out there give me assistance with setting up my database in order to backup it up directly to tape, via RMAN. We have the following setup:
MS-Windows NT4.0 SP6.0a
Oracle 8.1.7
Veritas Backup Exec for Windows NT Ver7.3
Tape drive is a Compaq DLT 40/80 (x2) with a TL891 mini library.
Any help in this matter would be greatly appreciated.
Many thanks
Carl Scotson
DBA - West Of Scotland Water

If you don't already know the syntax for allocating a channel for a backup to tape here it is:
ALLOCATE CHANNEL <channel_name> type 'sbt_tape';
As for sending the backup to tape instead of the storage pool that will have to be setup on the media manager side. We do that for our backups with Tivoli, but it was setup to go directly to tape through the Tivoli media manager software.

Is RMAN backup directly to tape faster then to disk?

A coworker claims that performing a full backup to tape is twice as fast as opposed to disk. I cant find any documentation to support this claim. Any thoughts one way or another?

user10784896 wrote:
A coworker claims that performing a full backup to tape is twice as fast as opposed to disk. I cant find any documentation to support this claim. Any thoughts one way or another?Tell him to prove it. There are too many variables for someone to just make a claim like that without qualification. I'd say that - at best - he once clocked one paticular backup to tape as faster than one particular backup to disk.
That said, if the tape really were faster (even incrementally faster, not to mention "twice as fast") I'd say there was some serious mis-configuration in the disk backup - either in the specification or the layout of the disk system itself, because left to its on devices disk is inherently faster. Look at the published I/O specs of the disk vendor vs. the tape vendor.

RMAN BACKUP ERROR in TAPE

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