RE: Questions re ASMLib on Linux

Greetings Bill.

Personally, I think the documentation says it all: http://download-uk.oracle.com/docs/cd/B19306_01/install.102/b14203/storage.h tm#sthref838

"If you intend to use Automatic Storage Management for database storage for Linux, then Oracle recommends that you install the ASMLIB driver and associated utilities, and use them to configure candidate disks"

With RAC it is always best to follow the beaten path and recommendations are certainly there to be followed.

There is another (small) section 3.6.4 stating that you can configure ASM with raw devices directly (i.e. no asmlib) if you wish.

If you choose the recommended path, the installation guide is really rather good on the order of what is required, broadly:

• Partition your disks
• Bind partitions to raw devices with correct perms
• Install asmlib
• /etc/init.d/oracleasm configure
• /etc/init.d/oracleasm createdisk DISK1 /dev/sdb1 (for each disk required)
• /etc/init.d/oracleasm scandisks (on the 2nd node)
• Run DBCA to map the ASM disks to disk groups.

HTH
Adrian

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Bill Wagman
Sent: 16 February 2007 19:55
To: Oracle-L_at_freelists.org
Subject: Questions re ASMLib on Linux

Greetings,

I am working with Oracle 10gR2 (10.2.0.3.0) on a two node RAC cluster running on Linux RHEL3. My questions...

1)Is ASMLib required?
2)If so must one configure the disks prior to creating the ASM instance or will the DBCA take care of that?

If it is not required what are the advantages of using it?

Thanks.

Bill Wagman
Univ. of California at Davis
IET Campus Data Center
wjwagman_at_ucdavis.edu
(530) 754-6208

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