Re: Question re asm disks

You may want to use '/etc/init.d/oracldasm with the querydisk option. this should give you the device numbers for that particular disk.

ex.
/etc/init.d/oracleasm querydisk DATA100_0019 Disk "DATA100_0019" is a valid ASM disk on device [120, 113]

I think go to the device directory and see what 120,113 corresponds to.

On 5/8/08, William Wagman <wjwagman_at_ucdavis.edu> wrote:
>
> Greetings,
>
> I hope this isn't a naïve question but anyway, I am using ASM on a two
> node RAC cluster, Oracle 10.2.0.3.0 SE on Red Hat EL4. The raw devices look
> like this...
>
> crw-rw---- 1 root dba 162, 1 May 6 14:45 /dev/raw/raw1
> crw-rw---- 1 oracle dba 162, 10 May 6 14:45 /dev/raw/raw10
> crw-rw---- 1 oracle dba 162, 11 May 7 10:36 /dev/raw/raw11
> crw-rw---- 1 root dba 162, 2 May 6 14:45 /dev/raw/raw2
> crw-r--r-- 1 oracle dba 162, 3 May 6 14:45 /dev/raw/raw3
> crw-r--r-- 1 oracle dba 162, 5 May 6 14:45 /dev/raw/raw5
> crw-r--r-- 1 oracle dba 162, 6 May 6 14:45 /dev/raw/raw6
> crw-rw---- 1 oracle dba 162, 7 May 6 14:45 /dev/raw/raw7
> crw-rw---- 1 oracle dba 162, 8 May 6 14:45 /dev/raw/raw8
> crw-rw---- 1 oracle dba 162, 9 May 6 14:45 /dev/raw/raw9
>
> I know which are used for the CRS and voting disks but I am trying to
> determine which of the others make up the ASM disk groups and I can't find
> information on how to do that. The disk groups have been provisioned using
> asmlib. Querying v$asm_disk returns the following...
>
> SQL> select group_number,name,substr(path,1,30) from v$asm_disk;
>
> GROUP_NUMBER NAME SUBSTR(PATH,1,30)
> ------------ ------------------------------ ------------------------------
> 0 /dev/raw/raw10
> 0 /dev/raw/raw9
> 0 /dev/raw/raw8
> 0 /dev/raw/raw7
> 0 /dev/raw/raw6
> 0 /dev/raw/raw5
> 0 /dev/raw/raw3
> 0 /dev/raw/raw11
> 0 /dev/raw/raw1
> 0 /dev/raw/raw2
> 1 VOL1 ORCL:VOL1
> 1 VOL2 ORCL:VOL2
> 2 VOL3 ORCL:VOL3
>
> For example which of the raw devices are mapped to VOL1? I suspect I am
> not understanding something or else just have not found the appropriate view
> to query but if someone can help me out I would be most appreciative.
>
> Thanks.
>
> Bill Wagman
> Univ. of California at Davis
> IET Campus Data Center
> wjwagman_at_ucdavis.edu
> (530) 754-6208
>
>
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> http://www.freelists.org/webpage/oracle-l
>
>
>

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