uname -a
rpm -qa | grep oracleasm
oracleasm-2.6.18-371.6.1.el5-2.0.5-1.el5
oracleasm-support-2.1.8-1.el5
oracleasm-2.6.18-371.el5-2.0.5-1.el5
$rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE}.%{ARCH}.rpm\n" | grep asm
oracleasm-support-2.0.4-1.el5.x86_64.rpm
oracleasm-2.6.18-53.el5-2.0.4-1.el5.x86_64.rpm
oracleasmlib-2.0.3-1.el5.x86_64.rpm
modinfo oracleasm
lsmod <- shows the asmlib loaded
/etc/init.d/oracleasm listdisks
/etc/init.d/oracleasm status
/sbin/blkid | grep oracleasm
/etc/init.d/oracleasm listdisks | xargs /etc/init.d/oracleasm querydisk -d
/usr/sbin/oracleasm-discover
/usr/sbin/oracleasm-discover 'ORCL:*'
$GRID_HOME/bin/kfod asm_diskstring='ORCL:*' disks=all
$GRID_HOME/bin/kfod disks=all
$GRID_HOME/bin/kfod asm_diskstring='/dev/oracleasm/disks/*' disks=all
$GRID_HOME/bin/kfod asm_diskstring='ORCL:*' disks=all
$GRID_HOME/bin/kfod asm_diskstring='ORCL:*' disks=all verbose=true
cat /etc/sysconfig/oracleasm
cat /etc/sysconfig/oracleasm-_dev_oracleasm
cat /etc/*release
cat /proc/partitions
strace -aef -o /tmp/kfod.txt kfod asm_diskstring='ORCL:*' disks=all verbose=true
crsctl query css votedisk
ocrcheck
ls -l $GRID_HOME/cfgtoollogs/crsconfig/*
ls -l /app/oracle/cfgtoollogs/asmca/*
ls -ltr /dev/oracleasm/disks
ls -l /dev/oracleasm/disks
ls -l /dev/mpath/
ls -l /dev/mapper/
multipath -ll
[root@$GRID_HOME/bin/kfed dev=/dev/oracleasm/disks/DATA001 op=READ | egrep "kfdhdb.vf|ausize"
[root@$GRID_HOME/bin/kfed dev=/dev/oracleasm/disks/DATA002 op=READ | egrep "kfdhdb.vf|ausize"
[root@$GRID_HOME/bin/kfed dev=/dev/oracleasm/disks/DATA003 op=READ | egrep "kfdhdb.vf|ausize"
Now that the ASMLib software is installed, a few steps have to be taken by the system administrator to make the ASM driver available.
The ASM driver needs to be loaded, and the driver filesystem needs to be mounted.
This is taken care of by the initialization script, /etc/init.d/oracleasm.
Run the /etc/init.d/oracleasm script with the 'configure' option.
It will ask for the user and group that default to owning the ASM driver access point.
If the database was running as the 'oracle' user and the 'dba' group, the output would look like this:
[root@ca-test1 /]# /etc/init.d/oracleasm configure
Configuring the Oracle ASM library driver.
This will configure the on-boot properties of the Oracle ASM library
driver. The following questions will determine whether the driver is
loaded on boot and what permissions it will have. The current values
will be shown in brackets ('[]'). Hitting without typing an
answer will keep that current value. Ctrl-C will abort.
Default user to own the driver interface []: oracle
Default group to own the driver interface []: dba
Start Oracle ASM library driver on boot (y/n) [n]: y
Fix permissions of Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration [ OK ]
Creating /dev/oracleasm mount point [ OK ]
Loading module "oracleasm" [ OK ]
Mounting ASMlib driver filesystem [ OK ]
Scanning system for ASM disks [ OK ]
[root@ca-test1 /]# /etc/init.d/oracleasm disable
Writing Oracle ASM library driver configuration [ OK ]
Unmounting ASMlib driver filesystem [ OK ]
Unloading module "oracleasm" [ OK ]
[root@ca-test1 /]# /etc/init.d/oracleasm enable
Writing Oracle ASM library driver configuration [ OK ]
Loading module "oracleasm" [ OK ]
Mounting ASMlib driver filesystem [ OK ]
Scanning system for ASM disks [ OK ]
Existing disks can be listed and queried:
[root@ca-test1 /]# /etc/init.d/oracleasm listdisks
VOL1
VOL2
VOL3
[root@ca-test1 /]# /etc/init.d/oracleasm querydisk VOL1
Checking for ASM disk "VOL1" [ OK ]
When a disk is added to a RAC setup, the other nodes need to be notified about it.
Run the 'createdisk' command on one node, and then run 'scandisks' on every other node:
[root@ca-test1 /]# /etc/init.d/oracleasm scandisks
Scanning system for ASM disks [ OK ]
Execute the ‘lsmod’ command (as root), to show the loaded oracleasm module.
==============================================================================
The oracleasm should be listed with a “Used by” column setting of ‘1’.
[root@racnode2 root]# lsmod
Module Size Used by Not tainted
ide-cd 35296 0 (autoclean)
cdrom 35520 0 (autoclean) [ide-cd]
soundcore 7940 0 (autoclean)
oracleasm 16384 1
cpqfc 53376 1
autofs 13796 0 (autoclean) (unused)
ocfs 302088 3
eepro100 21968 2
ext3 70944 6
jbd 55444 6 [ext3]
cpqarray 26080 10
sd_mod 13920 1
scsi_mod 126812 2 [cpqfc sd_mod]
