Creation of shared storage for ASM (Automatic Shared Storage) to be used for RAC

Creation of shared storage for ASM (Automatic Shared Storage) to be used for RAC

1) add 1 more hard disk to existing setup, of fixed size 30GB.

2) Verifty whether is it available or not

# fdisk -l

3) Create partition

# fdisk /dev/sdb

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)

p

Partition number (1-4): 1
First cylinder (1-3916, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-3916, default 3916):
Using default value 3916

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.


# fdisk -l

Disk /dev/sda: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        1530    12289693+  83  Linux
/dev/sda2            1531        6629    40957717+  83  Linux
/dev/sda3            6630        7904    10241437+  83  Linux
/dev/sda4            7905       10443    20394517+   5  Extended
/dev/sda5            7905        8796     7164958+  82  Linux swap / Solaris
/dev/sda6            8797        9561     6144831   83  Linux
/dev/sda7            9562       10198     5116671   83  Linux

Disk /dev/sdb: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        3916    31455238+  83  Linux

# cd /dev/
# ls sd*
sda  sda1  sda2  sda3  sda4  sda5  sda6  sda7  sdb  sdb1

3) Change the ownership of created partion

# chown grid:oinstall /dev/sdb1
# chown grid:oinstall /dev/sdb
# chmod 660 /dev/sdb1
# chmod 660 /dev/sdb

4) Configure asm

# /etc/init.d/oracleasm configure -i

Default user to own the driver interface []: grid
Default group to own the driver interface []: oinstall
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y

Writing Oracle ASM library driver configuration: done
Initializing the Oracle ASMLib driver:                     [  OK  ]
Scanning the system for Oracle ASMLib disks:        [  OK  ]

5) Create label to partition

# /etc/init.d/oracleasm createdisk data1 /dev/sdb1
Marking disk "data1" as an ASM disk:                       [  OK  ]

6)

# /etc/init.d/oracleasm restart
Dropping Oracle ASMLib disks:                              [  OK  ]
Shutting down the Oracle ASMLib driver:               [  OK  ]
Initializing the Oracle ASMLib driver:                     [  OK  ]
Scanning the system for Oracle ASMLib disks:        [  OK  ]

7)

# /etc/init.d/oracleasm scandisks
Scanning the system for Oracle ASMLib disks:               [  OK  ]

8)

# /etc/init.d/oracleasm listdisks
DATA1