RE: Further Questions re ASM and RAC

Hmmm, I haven't tried restarting the rawdevices services. That leads to
a question though, what will that do for the CRS installation is the OCR
and voting disk are on raw devices. I am worried that they will become
damaged. If they won't I will try that. Can you let me know.
 
Thanks.
 

Bill Wagman
Univ. of California at Davis
IET Campus Data Center
wjwagman@xxxxxxxxxxx
(530) 754-6208 

 

________________________________

From: Rajeev Prabhakar [mailto:rprabha01@xxxxxxxxx] 
Sent: Saturday, April 07, 2007 1:13 PM
To: William Wagman
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: Further Questions re ASM and RAC


Hi Bill

May be, you should try the following steps and see if it helps you.

shutdown the asm instance.

Reinitialize the disks using dd and once that is over, ensure entries in

the /etc/sysconfig/rawdevices. Restart rawdevice binding service. 
i.e.  service rawdevices restart (as root)

Now, restart the ASM instance and try creating the diskgroup again
with appropriate disks.

-Rajeev


On 4/6/07, William Wagman <wjwagman@xxxxxxxxxxx> wrote: 

        Greetings,
        
        I am continuing to have difficulties getting ASM installed and
        configured in my two-node RAC cluster, Oracle 10.2.0.3.0 on
RHEL3 and I
        am certain there is some very simple little bit which I am
missing but I 
        just can't figure this out.
        
        I encountered difficulties with the ASM installation a couple of
days
        ago and it was suggested that I uninstall everything and start
all over
        again with CRS which I did. I installed CRS and began the
installation 
        of ASM. I configured the ASM instance using the installer. When
it got
        to the point of creating a disk group I accepted what I thought
was the
        default 'DATA' and continued but the installer said such a group
already 
        existed. That surprised me because I thought I had removed all
traces by
        uninstalling, deleteing and dd on disks. Nevertheless, the
install
        seemed ok, it just couldn't mount the disk groups. I went ahead,
        installed the 10.2.0.3.0 patch set and am now trying to get the
dis
        groups mounted and here is what I find. First, there is a
diskgroup but
        it is not mounted...
        
        SQL> select * from v$asm_diskgroup;
        
        GROUP_NUMBER NAME                           SECTOR_SIZE
BLOCK_SIZE 
        ALLOCATION_UNIT_SIZE STATE
        ------------ ------------------------------ -----------
----------
        -------------------- -----------
        TYPE     TOTAL_MB    FREE_MB REQUIRED_MIRROR_FREE_MB
USABLE_FILE_MB
        OFFLINE_DISKS U 
        ------ ---------- ---------- -----------------------
--------------
        ------------- -
        COMPATIBILITY
        ------------------------------------------------------------
        DATABASE_COMPATIBILITY
        ------------------------------------------------------------ 
                   0 DATA                                   512
4096
        1048576 DISMOUNTED
                        0          0                       0
0
        0 N
        0.0.0.0.0
        0.0.0.0.0
        
        I can't mount it... 
        
        SQL> alter diskgroup data mount;
        alter diskgroup data mount
        *
        ERROR at line 1:
        ORA-15032: not all alterations performed
        ORA-15063: ASM discovered an insufficient number of disks for
diskgroup
        "DATA"
        
        I can't add a disk...
        
        SQL> alter diskgroup data add disk '/dev/raw/raw3';
        alter diskgroup data add disk '/dev/raw/raw3'
        *
        ERROR at line 1:
        ORA-15032: not all alterations performed 
        ORA-15001: diskgroup "DATA" does not exist or is not mounted
        
        Nor can I drop it...
        
        SQL> drop diskgroup data including contents;
        drop diskgroup data including contents
        *
        ERROR at line 1: 
        ORA-15039: diskgroup not dropped
        ORA-15001: diskgroup "DATA" does not exist or is not mounted
        
        So I tried to create a new disk group...
        
        SQL> create diskgroup GROUP1 external redundancy
          2  disk '/dev/raw/raw3';
        create diskgroup GROUP1 external redundancy
        *
        ERROR at line 1:
        ORA-15018: diskgroup cannot be created
        ORA-15020: discovered duplicate ASM disk "DATA_0000"
        
        But I don't see where that disk shows up...
        
        SQL> select group_number,disk_number,name,path from v$asm_disk;
        
        GROUP_NUMBER DISK_NUMBER NAME
        ------------ ----------- ------------------------------
        PATH
        
------------------------------------------------------------------------
        ----------------------------
                   0           0
        /dev/raw/raw4
        
                   0           1
        /dev/raw/raw3
        
                   0           4 
        ORCL:VOL2
        
                   0           3
        ORCL:VOL1
        
                   0           2
        /dev/raw/raw2
        
        The parameter asm_diskstring is not set but I don't know if that
has
        anything to do with this. I'm completely stuck, I don't know
what else 
        to look at. I did configure the disks with oracleasm and I am
pretty
        sure I did that part correctly. Sorry to keep bugging everyone
with this
        but I'm completely stuck. I suspect it is something simple that
I am 
        just not seeing. If anyone can help me I would greatly
appreciate it.
        
        Thanks.
        
        Bill Wagman
        Univ. of California at Davis
        IET Campus Data Center
        wjwagman@xxxxxxxxxxx 
        (530) 754-6208
        --
        http://www.freelists.org/webpage/oracle-l

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