[Oracle-l] 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.

Bradd,



Thanks, that is what I have been looking for.



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

From: Bradd Piontek
Sent: Thursday, May 08, 2008 9:50 AM
To: William Wagman
Cc: oracle-l_at_freelists.org
Subject: 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 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