################################################################ # How to install and setup ASMLib packages ################################################################
###### List of Platform depenfent but Kernel independent packages ###### oracleasm-support-2.1.3-1.<distro>.x86_64.rpm oracleasmlib-2.0.4-1.<distro>.x86_64.rpm
###### List of Platform and Kernel dependent packages ###### oracleasm-2.6.16.46-0.12-smp-2.0.3-1.x86_64.rpm oracleasm-2.6.16.46-0.12-default-2.0.3-1.x86_64.rpm
-- Install the packages using the command rpm –ivh on all the nodes
###### ASMLib Configuration (to repeat on all nodes of the cluster) ###### [root@lrh-node1 /]# /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 []: grid Default group to own the driver interface []: asmdba 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 ]
###### Create disk partitions and ASM disks (from one of the nodes of the cluster) ###### -- Having a list of devices dedicated to ASM create one primary partition per disk or LUN using fdisk -- command and than use ASMLib utility to implement one ASM Disk per device.
lrh-node1:/u01 # fdisk -l /dev/sdh
Disk /dev/sdh: 38.6 GB, 38654705664 bytes 255 heads, 63 sectors/track, 4699 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdh1 1 4700 37747712 83 Linux lrh-node1:/u01 # fdisk -l /dev/sdi
Disk /dev/sdi: 38.6 GB, 38654705664 bytes 255 heads, 63 sectors/track, 4699 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdi1 1 4700 37747712 83 Linux lrh-node1:/u01 # fdisk -l /dev/sdj
Disk /dev/sdj: 38.6 GB, 38654705664 bytes 255 heads, 63 sectors/track, 4699 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdj1 1 4699 37744686 83 Linux lrh-node1:/u01 # lrh-node1:/u01 # fdisk /dev/sdh
The number of cylinders for this disk is set to 4699. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): d Selected partition 1
Command (m for help): p
Disk /dev/sdh: 38.6 GB, 38654705664 bytes 255 heads, 63 sectors/track, 4699 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-4699, default 1): 1 Last cylinder or +size or +sizeM or +sizeK (1-4699, default 4699): +1024M
Command (m for help): p
Disk /dev/sdh: 38.6 GB, 38654705664 bytes 255 heads, 63 sectors/track, 4699 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdh1 1 125 1004031 83 Linux
Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 2 First cylinder (126-4699, default 126): Using default value 126 Last cylinder or +size or +sizeM or +sizeK (126-4699, default 4699): Using default value 4699
Command (m for help): p
Disk /dev/sdh: 38.6 GB, 38654705664 bytes 255 heads, 63 sectors/track, 4699 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System /dev/sdh1 1 125 1004031 83 Linux /dev/sdh2 126 4699 36740655 83 Linux
Command (m for help): w The partition table has been altered!
Calling ioctl() to re-read partition table. Syncing disks. lrh-node1:/u01 #partprobe
###### Once the disks have been sliced the ASM Disks can be created ###### lrh-node1:/u01 # /etc/init.d/oracleasm Usage: /etc/init.d/oracleasm {start|stop|restart|enable|disable|configure|createdisk|deletedisk|querydisk|listdisks|scandisks|status} lrh-node1:/u01 # /etc/init.d/oracleasm createdisk OCR1 /dev/sdh1 Marking disk "/dev/sdh1" as an ASM disk: done lrh-node1:/u01 # /etc/init.d/oracleasm createdisk DATA1 /dev/sdh2 Marking disk "/dev/sdh2" as an ASM disk: done lrh-node1:/u01 # /etc/init.d/oracleasm scandisks Scanning system for ASM disks: done lrh-node1:/u01 #
-- After having created all the ASM Disks runs the utility scandisks on all nodes of the cluster, -- this allows ASM to discover all the new ASM Disks created.
lrh-node2:/dev/oracleasm/disks # /etc/init.d/oracleasm scandisks Scanning system for ASM disks: done lrh-node2:/dev/oracleasm/disks # /etc/init.d/oracleasm listdisks DATA1 DATA2 DATA3 OCR1 OCR2 OCR3
###### ASM diskstring and diskgroup parameters ###### *.asm_diskstring='ORCL:*' *.asm_diskgroups='OCR_VOT','DATA1','FRA1'
