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ASM Configuration in Oracle 10g

Siva Prasad
Occasional Advisor

ASM Configuration in Oracle 10g

I am trying to configure ASM for one of my database. I selected the ASM option in DBCA. It successfully created the ASM instance it does not show any disks for selection. I have a disk from the XP array. So Do i need to do any configuration on the disk to appear in DBCA wizard. I am doing it in HPUX 11.11 PA risc machine. Pleas help me ?

Thanks in advance,
Honored Contributor

Re: ASM Configuration in Oracle 10g

Hi Siva,

"A ship in the harbor is safe, but that is not what ships are built for"
Siva Prasad
Occasional Advisor

Re: ASM Configuration in Oracle 10g

Hi Arun,
I want the command sspecific to HPUX . The documents u specified refers to linux. Which is the depot i need to install on HPUX for ASM

Siva Prasad
Honored Contributor

Re: ASM Configuration in Oracle 10g

Steven E. Protter
Exalted Contributor

Re: ASM Configuration in Oracle 10g


A few docs that deal with HP-UX specifically.

Probably very good.

You need to consult for specifics on depots and patches required for this.

HP-UX ASM patches|&pageContextName=hpux:::
Search for ASM

Always pays to read the question prior to posting links.

I hope these help.

Steven E Protter
Owner of ISN Corporation
Honored Contributor

Re: ASM Configuration in Oracle 10g

hi siva,

see also metalink note: 265633.1 ASM Technical Best Practices

It is stated that disks (e.g. c3t19d5s4, c3t19d16s4, c3t19d17s4, c3t19d18s4) should be identified, and their ownership set to the correct â oracle:dbaâ .

Also, these disks can be defined in the init.ora parameter, asm_diskstring.


When ASM scans for disks, it will use that string, and find any devices that it has permissions to open.

Upon successful discovery, the V$ASM_DISK view on the ASM instance, will now reflect which disks were discovered. Note, henceforth, all views, unless otherwise stated, are examined from the ASM instance and not from the database instance.

hope this helps too!

kind regards
No person was ever honoured for what he received. Honour has been the reward for what he gave (clavin coolidge)
Esteemed Contributor

Re: ASM Configuration in Oracle 10g

1) Be sure to use the raw device names
2) Be sure ownership and perms are correct.

This is what I do (on all nodes):

1) I create a directory

## mkdir /dev/oracle

2) Then I make symbolic links from from within there to the actual raw disk device names

## ln -s /dev/rdsk/c4t0d0 /dev/oracle/rawCSSVotingDisk
## ln -s /dev/rdsk/c4t0d1 /dev/oracle/rawOCR_File
## ln -s /dev/rdsk/c4t0d2 /dev/oracle/gp1ASM1
## ln -s /dev/rdsk/c4t0d3 /dev/oracle/gp1ASM2

3) Change own/perms (I do both the link and the target).

## chown -h oracle:dba /dev/oracle/*
## chown oracle:dba /dev/oracle/*
## chown -h root:oinstall /dev/oracle/rawOCR_File
## chown root:oinstall /dev/oracle/rawOCR_File
## chmod 660 /dev/oracle/*
## chmod 640 /dev/oracle/rawOCR_File

## ll /devoracle/
lrwxrwxrwx 1 oracle dba ......... gp1ASM1 -> /dev/raw/raw3
lrwxrwxrwx 1 oracle dba ......... gp1ASM2 -> /dev/raw/raw4
lrwxrwxrwx 1 oracle dba ......... rawCSSVotingDisk -> /dev/raw/raw2
lrwxrwxrwx 1 root.. oinstall ..... rawOCR_File -> /dev/raw/raw1

Now, I can reference the devices with convenient names and know exactly which are for what.
For example, the ASM discovery string for disk group1 would simply be:


"The lyf so short, the craft so long to lerne." - Chaucer
Frequent Advisor

Re: ASM Configuration in Oracle 10g

I you have a chance check this site too.
Determination is key for success.