How to check my Oracle dbms is using ASM for storage?

Thanks.

On unix first check whether you have any ASM instance or not by:
ps -ef | grep pmon
It will show you an entry similar to:
oracle 6953 1 0 Jun24 ? 00:00:07 asm_pmon_+ASM
which means you are having ASM instance on the box, next to find out whether a DB is using it or not login to that DB and issue (from sqlplus):
SQL>select name from v$datafile;
If any of the datafile path is starting from a "+" sign it means you are using ASM diskgroup for that file.
You can also issue:
show parameter db_recovery_file_dest
to check if the flashback area of your database is sitting on ASM or not.
Daljit Singh

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Thread-14] 2010-01-28 13:51:34.608 NZDT ] CompManager.doPreMigrationChecks:2596] Logging Dir at this point :=/u04/app/oracle/cfgtoollogs/dbua/TRAIN/upgrade3
Thread-14] 2010-01-28 13:51:34.612 NZDT ] CompManager.doPreMigrationChecks:2605] ++++++++++ASM Checks Start++++++++++
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Thread-14] 2010-01-28 13:51:34.613 NZDT ] CompManager.isModeSet:9244] Mode := 1 is set
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Thread-14] 2010-01-28 13:51:34.613 NZDT ] OracleHome.getVersion:877] OracleHome.getVersion called. Current Version: 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.614 NZDT ] OracleHome.getVersion:943] Current Version From Inventory: 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.614 NZDT ] OracleHome.getVersion:948] using sqlplus: /u04/app/oracle/product/10.2.0/db_1/bin/sqlplus
Thread-14] 2010-01-28 13:51:34.614 NZDT ] OracleHome.getVersion:877] OracleHome.getVersion called. Current Version: 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.615 NZDT ] OracleHome.getVersion:943] Current Version From Inventory: 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.615 NZDT ] OracleHome.getVersion:948] using sqlplus: /u04/app/oracle/product/10.2.0/db_1/bin/sqlplus
Thread-14] 2010-01-28 13:51:34.615 NZDT ] OracleHome.getVersion:877] OracleHome.getVersion called. Current Version: 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.616 NZDT ] OracleHome.getVersion:943] Current Version From Inventory: 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.616 NZDT ] OracleHome.getVersion:948] using sqlplus: /u04/app/oracle/product/10.2.0/db_1/bin/sqlplus
Thread-14] 2010-01-28 13:51:34.616 NZDT ] SQLPlusEngine.getCmmdParams:222] m_home 10.2.0.4.0
Thread-14] 2010-01-28 13:51:34.616 NZDT ] SQLPlusEngine.getCmmdParams:223] version > 112 false
Thread-14] 2010-01-28 13:51:34.617 NZDT ] SQLEngine.getEnvParams:547] Default NLS_LANG: AMERICAN_AMERICA.AL32UTF8
Thread-14] 2010-01-28 13:51:34.617 NZDT ] SQLEngine.getEnvParams:557] NLS_LANG: AMERICAN_AMERICA.AL32UTF8
Thread-14] 2010-01-28 13:51:34.618 NZDT ] SQLEngine.initialize:317] Execing SQLPLUS/SVRMGR process...
Thread-14] 2010-01-28 13:51:34.659 NZDT ] SQLEngine.initialize:354] m_bReaderStarted: false
Thread-14] 2010-01-28 13:51:34.660 NZDT ] SQLEngine.initialize:358] Starting Reader Thread...
Thread-14] 2010-01-28 13:51:34.666 NZDT ] SQLEngine.initialize:407] Waiting for m_bReaderStarted to be true
Thread-14] 2010-01-28 13:51:34.823 NZDT ] CompManager.asmUpgradeFeasible:9419] Databases uses ASM? :=true
Thread-14] 2010-01-28 13:51:34.835 NZDT ] HAUtils.getHASHome:583] Oracle home from system properties: /u04/app/oracle/product/11.2.0/dbhome_1
Thread-14] 2010-01-28 13:51:34.836 NZDT ] HAUtils.getCRSHome:540] Getting configured CRS/HAS home for Oracle home ( /u04/app/oracle/product/11.2.0/dbhome_1 ) ...
Thread-14] 2010-01-28 13:51:34.836 NZDT ] GETCRSHOMEUtil.<init>:76] Toolname: getcrshome --- Tool location: /u04/app/oracle/product/11.2.0/dbhome_1/srvm/adminTool dependencies: Ljava.lang.String;@1d6f122
Thread-14] 2010-01-28 13:51:34.837 NZDT ] NativeSystem.isCmdScv:471] isCmdScv: cmd=]
Thread-26] 2010-01-28 13:51:34.883 NZDT ] StreamReader.run:61] In StreamReader.run
Thread-25] 2010-01-28 13:51:34.885 NZDT ] StreamReader.run:61] In StreamReader.run
Thread-14] 2010-01-28 13:51:34.889 NZDT ] CmdToolUtil.doexecute:372] nativeSystem.runRemoteExecCmd failed. Command = /u04/app/oracle/product/11.2.0/dbhome_1/srvm/admin/getcrshome arguments = ] env = null
Thread-14] 2010-01-28 13:51:34.890 NZDT ] ASMUtils.initialize:184] Error initializing ASMUtils: PRCT-1011 : Failed to run "getcrshome"
PRCT-1011 : Failed to run "getcrshome"
at oracle.cluster.deployment.ClusterwareInfo.getConfiguredCRSHome(ClusterwareInfo.java:423)
at oracle.sysman.assistants.util.hasi.HAUtils.getCRSHome(HAUtils.java:544)
at oracle.sysman.assistants.util.hasi.HAUtils.getHASHome(HAUtils.java:604)
at oracle.sysman.assistants.util.asm.ASMUtils.initialize(ASMUtils.java:157)
at oracle.sysman.assistants.util.asm.ASMUtils.getASMUtils(ASMUtils.java:137)
at oracle.sysman.assistants.dbma.backend.CompManager.asmUpgradeFeasible(CompManager.java:9424)
at oracle.sysman.assistants.dbma.backend.CompManager.doPreMigrationChecks(CompManager.java:2606)
at oracle.sysman.assistants.dbma.backend.CompManager.obtainDatabaseInformation(CompManager.java:3749)
at oracle.sysman.assistants.dbma.ui.DatabasesPage.doProcessing(DatabasesPage.java:792)
at oracle.sysman.assistants.util.WaitDialog.run(WaitDialog.java:187)
at java.lang.Thread.run(Thread.java:595)
Caused by: PRCT-1011 : Failed to run "getcrshome"
at oracle.cluster.cmdtools.CmdToolUtil.doexecute(CmdToolUtil.java:376)
at oracle.cluster.cmdtools.CmdToolUtil.execute(CmdToolUtil.java:324)
at oracle.cluster.cmdtools.GETCRSHOMEUtil.getCRS_HOME(GETCRSHOMEUtil.java:122)
at oracle.cluster.cmdtools.GETCRSHOMEUtil.getCRS_HOME(GETCRSHOMEUtil.java:100)
at oracle.cluster.deployment.ClusterwareInfo.getConfiguredCRSHome(ClusterwareInfo.java:420)
... 10 more
Thread-14] 2010-01-28 13:51:34.892 NZDT ] ASMUtils.validateASMInstance:237] clusterware/siha home not found
Thread-14] 2010-01-28 13:51:34.893 NZDT ] CompManager.asmUpgradeFeasible:9431] validateASM exception Grid Infrastructure or Clusterware home not found. ASM should be running under this home.
AWT-EventQueue-0] 2010-01-28 13:51:59.113 NZDT ] SQLEngine.done:2148] Done called
Edited by: stuartu on Jan 29, 2010 9:37 AM
Edited by: stuartu on Jan 29, 2010 9:45 AM

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I've a recently installed RAC11gR2(11.2.0.3) on HP-UX
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uid=1100(grid) gid=1000(oinstall) groups=1031(dba),1021(asmdba)
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uid=1100(grid) gid=1000(oinstall) groups=1031(dba),1021(asmdba)
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uid=1101(oracle) gid=1000(oinstall) groups=1031(dba),1021(asmdba),1033(oper)
Node2: # id oracle
uid=1101(oracle) gid=1000(oinstall) groups=1031(dba),1021(asmdba),1033(oper)
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$ crs_stat -t
Name Type Target State Host
ora.DATA.dg ora....up.type ONLINE ONLINE node03
ora.FRA.dg ora....up.type ONLINE ONLINE node03
ora....ER.lsnr ora....er.type ONLINE ONLINE node03
ora....N1.lsnr ora....er.type ONLINE ONLINE node04
ora.asm ora.asm.type ONLINE ONLINE node03
ora.cvu ora.cvu.type ONLINE ONLINE node04
ora.gsd ora.gsd.type OFFLINE OFFLINE
ora....network ora....rk.type ONLINE ONLINE node03
ora.oc4j ora.oc4j.type OFFLINE OFFLINE
ora.ons ora.ons.type ONLINE ONLINE node03
ora.scan1.vip ora....ip.type ONLINE ONLINE node04
ora....SM1.asm application ONLINE ONLINE node03
ora....03.lsnr application ONLINE ONLINE node03
ora....d03.gsd application OFFLINE OFFLINE
ora....d03.ons application ONLINE ONLINE node03
ora....d03.vip ora....t1.type ONLINE ONLINE node03
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ora....04.lsnr application ONLINE ONLINE node04
ora....d04.gsd application OFFLINE OFFLINE
ora....d04.ons application ONLINE ONLINE node04
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$
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$
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LSNRCTL for HPUX: Version 11.2.0.3.0 - Production on 16-MAY-2012 15:41:06
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for HPUX: Version 11.2.0.3.0 - Production
Start Date 16-MAY-2012 15:24:19
Uptime 0 days 0 hr. 16 min. 47 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/11.2.0/grid/network/admin/listener.ora
Listener Log File /u01/app/grid/diag/tnslsnr/node03/listener/alert/log .xml
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(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=16.0.0.133)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=16.0.0.136)(PORT=1521)))
Services Summary...
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Instance "+ASM1", status READY, has 1 handler(s) for this service...
The command completed successfully
$
$
DATA & FRA disk group are created:
$
$ echo $ORACLE_SID
+ASM1
$
$ asmcmd
ASMCMD>
ASMCMD> ls -lt
State Type Rebal Name
MOUNTED EXTERN N DATA/
MOUNTED EXTERN N FRA/
ASMCMD>
ASMCMD>
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Thanks in advance

Thanks both
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authorized_keys
known_hosts
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