The document provides instructions for stopping and starting various Oracle components in a RAC environment using srvctl commands. It also describes useful ASM commands for creating, dropping, mounting and checking disk groups as well as administering ASM from the operating system level using asmcmd.

1. RAC : STOP SEQUENCE
COMMAND DESCRIPTION
srvctl stop database -d ORCL STOP DATABASE
srvctl stop instance -d ORCL -i ORCL1 STOP first INSTANCE (skip it if running 'stop database' as that will stop both instances)
srvctl stop instance -d ORCL -i ORCL2 STOP second INSTANCE (skip it if running 'stop database' as that will stop both instances)
srvctl stop asm -n NODE1 STOP ASM INSTANCES on NODE 1 (In 11G , we have OCR on ASM so we cannot stop ASM, but if you have OCR in NON-ASM
you should stop it)
srvctl stop asm -n NODE2 STOP ASM INSTANCES on NODE 2 (In 11G , we have OCR on ASM so we cannot stop ASM, but if you have OCR in NON-ASM
you should stop it)
srvctl stop nodeapps -n NODE1 STOP NODEAPPS on NODE 1
srvctl stop nodeapps -n NODE2 STOP NODEAPPS on NODE 2
/etc/init.d/init.crs stop STOP CRS PROCESSES (AS ROOT USER)
RAC : START SEQUENCE
COMMAND DESCRIPTION
/etc/init.d/init.crs start START CRS PROCESS (AS ROOT USER)
srvctl start asm -n NODE1 START ASM INSTANCE on node 1
srvctl start asm -n NODE2 START ASM INSTANCE on node 2
srvctl start database -d ORCL START DATABASE
srvctl start instance -d ORCL -i ORCL1 START first INSTANCE (skip it if running 'start database' as that will
start both instances)
srvctl start instance -d ORCL -i ORCL2 START second INSTANCE (skip it if running 'start database', as taht will
start both instances)
srvctl start nodeapps -n NODE1 START NODEAPPS on NODE1
srvctl start nodeapps -n NODE2 START NODEAPPS ON NODE2
OTHER USEFUL COMMANDS
crsctl status resource -t Clusterware Resource Status Check
srvctl status database -d ORCL STATUS OF DATABASE
srvctl stop listener -l LISTENER_NAME STOP A LISTENER
srvctl start listener -l LISTENER_NAME START A LISTENER

2. crsctl stop has stop all the clusterware services/ resources on specific node (including DB
and listener) (run as root)
crsctl start has start all the clusterware services/ resources on specific node (including DB
and listener) (run as root)
crsctl stop cluster -all to stop csr services on all nodes of clusterware (run as root)
crsctl start cluster -all to start crs services on all nodes of clusterware (run as root)
crsctl check has to check if ohasd is running/stopped (run as root)
crsctl enable has enable Oracle High Availability Services autostart (run as root)
crsctl disable has disable Oracle HAS autostart (run as root)
crsctl config has check if Oracle HAS autostart is enabled/ disabled (run as root)
srvctl status nodeapps to check the status of services on all nodes
crsctl stop crs stop all the clusterware services/ resources ON THAT NODE! (run as root)
crsctl start crs start all the clusterware services/ resources ON THAT NODE! (run as root)
cluvfy comp scan -verbose Verifying scan status scan_listener
srvctl config scan_listener Verifying scan port
srvctl relocate scan -i 1 -n NODE1 Relocate scan listener 1 to the mentioned node
ASM :
1) Create Disk Group:
Create Disk groups using the CREATE DISKGROUP statement and specify the level of redundancy.
Disk group redundancy types:-
NORMAL REDUNDANCY – Two-way mirroring, requiring two failure groups.
HIGH REDUNDANCY – Three-way mirroring, requiring three failure groups.
EXTERNAL REDUNDANCY – No mirroring for disks that are already protected using hardware RAID or mirroring.
Example 1 : External Redundancy
SQL> create diskgroup DATA external redundancy disk ‘/dev/oracleasm/disks/DISK1′ name DATA_1;
Example 2 : Normal Redundancy
SQL> CREATE DISKGROUP data NORMAL REDUNDANCY
FAILGROUP failure_group_1 DISK ‘/dev/oracleasm/disks/DISK2′ NAME DATA_2,’/dev/oracleasm/disks/DISK3′ NAME DATA_3,
FAILGROUP failure_group_2 DISK ‘/dev/oracleasm/disks/DISK4′ NAME DATA_4,’/dev/oracleasm/disks/DISK5′ NAME DATA_5;
2) Drop Disk Group:

3. SQL> DROP DISKGROUP data INCLUDING CONTENTS;
3) Alter Disk Group:
Add or remove disks from disk groups Using ALTER DISKGROUP statement. You can also use wildcard “*” to reference disks.
3.1) Add a disk.
SQL> ALTER DISKGROUP data ADD DISK ”/dev/oracleasm/disks/DISK6′ ;
3.2) Drop/remove a disk.
SQL> ALTER DISKGROUP data DROP DISK DATA_5;
3.3) Undrop disk
The UNDROP command used to undo only pending drop of disks. After you drop the disks you cannot revert.
SQL> ALTER DISKGROUP data UNDROP DISKS;
3.4) Diskgroup Rebalance:
Disk groups can be rebalanced manually Using REBALANCE clause and you can modify the POWER clause default value.
SQL> ALTER DISKGROUP DATA REBALANCE POWER 8;
3.5) MOUNT and DISMOUNT DiskGroups:
Normally Disk groups are mounted at ASM instance startup and dismounted at shutdown. Using MOUNT and DISMOUNT options you can make one or more
Disk Groups available or unavailable.
SQL> ALTER DISKGROUP data MOUNT;
SQL> ALTER DISKGROUP data DISMOUNT;
SQL> ALTER DISKGROUP ALL MOUNT;
SQL> ALTER DISKGROUP ALL DISMOUNT;
3.6) DiskGroup Check:
Use CHECK ALL to verify the internal consistency of disk group metadata and repair in case of any error.
SQL> ALTER DISKGROUP data CHECK ALL;

4. 3.7) DiskGroup resize:
Resize the one or all disks in the Diskgroup. Resize all disks in a failure group.
SQL> ALTER DISKGROUP data RESIZE DISKS IN FAILGROUP failure_group_1 SIZE 1024G;
Resize a specific disk.
SQL> ALTER DISKGROUP data RESIZE DISK DATA_0006 SIZE 100G;
Resize all disks in a disk group.
SQL> ALTER DISKGROUP data RESIZE ALL SIZE 100G;
4) To find ASM Diskgroup and Disks status
set lines 132
col name format a14
col PATH format a33
select GROUP_NUMBER,NAME,STATE,TYPE,TOTAL_MB,FREE_MB,VOTING_FILES from v$asm_diskgroup;
GROUP_NUMBER NAME STATE TYPE TOTAL_MB FREE_MB V
------------ ------------------------------ ----------- ------ ---------- ---------- -
1 OCR_VOTE MOUNTED EXTERN 152999 152603 Y
2 DB_DATA MOUNTED EXTERN 812000 810198 N
select GROUP_NUMBER,DISK_NUMBER,MOUNT_STATUS,HEADER_STATUS,MODE_STATUS,STATE,VOTING_FILE,name,path from v$asm_disk;
GROUP_NUMBER DISK_NUMBER MOUNT_S HEADER_STATU MODE_ST STATE V NAME PATH
------------ ----------- ------- ------------ ------- -------- - -------------- ---------------------------------
1 0 CACHED MEMBER ONLINE NORMAL Y OCR_VOTE_0 /dev/oracleasm/disks/OCR_VOTE01
2 3 CACHED MEMBER ONLINE NORMAL N DB_DATA_3 /dev/oracleasm/disks/DB_DATA04
2 2 CACHED MEMBER ONLINE NORMAL N DB_DATA_2 /dev/oracleasm/disks/DB_DATA03

5. 2 1 CACHED MEMBER ONLINE NORMAL N DB_DATA_1 /dev/oracleasm/disks/DB_DATA02
2 0 CACHED MEMBER ONLINE NORMAL N DB_DATA_0 /dev/oracleasm/disks/DB_DATA01
6 rows selected

6. ASMCMD commands to administer ASM from OS level
The asmcmd utility supports all common Linux commands:
ASMCMD> ls -alt -- list directory contents
ASMCMD> cd -- change directory
ASMCMD> mkdir -- create (make)directory
ASMCMD> du -- display directory space
ASMCMD> find -- standard UNIX find command
ASMCMD> rm -- remove file/directory
ASMCMD> lsdg -- list diskgroups
ASMCMD> pwd -- display current directory
ASMCMD> lsct -- list all connected Oracle instances