Disk missing from UNDO dg, dg not mounted
Hi ASM Gurus
I have two nodes on RAC, Win2k3 derver , ASM.
One node A UNDO DG is not mounted , it shows one of the disks are missing but it is perfectly mounted on Node B.
I checked which disks are pointing to UNDO dg, disks are seen by OS on nodes but not seen by ASM on node A.
here are the the outputs of asmtoo for NOde A and Node B
Node A
C:\Documents and Settings\OnyxAdmin>asmtool -list
NTFS \Device\Harddisk0\Partition2 138701M
Oracle Raw Device file \Device\Harddisk2\Partition1 1011M
ORCLDISKDATA0 \Device\Harddisk3\Partition1 51183M
NTFS \Device\Harddisk4\Partition1 1019M
ORCLDISKDATA1 \Device\Harddisk5\Partition1 102390M --> UNDO DISK
Oracle Raw Device file \Device\Harddisk6\Partition1 1011M
ORCLDISKDATA2 \Device\Harddisk7\Partition1 102390M
ORCLDISKDATA3 \Device\Harddisk8\Partition1 102390M
NTFS \Device\Harddisk9\Partition1 1019M
ORCLDISKDATA4 \Device\Harddisk10\Partition1 51183M
ORCLDISKARCH0 \Device\Harddisk11\Partition1 102390M
Oracle Raw Device file \Device\Harddisk12\Partition1 1011M
ORCLDISKARCH1 \Device\Harddisk13\Partition1 102390M
ORCLDISKDATA5 \Device\Harddisk14\Partition1 102390M
NODE B
asmtool -listNTFS \Device\Harddisk0\Partition2 138701M
Oracle Raw Device file \Device\Harddisk2\Partition1 1011M
ORCLDISKDATA0 \Device\Harddisk3\Partition1 51183M
NTFS \Device\Harddisk4\Partition1 1019M
ORCLDISKDATA1 \Device\Harddisk5\Partition1 102390M --> UNDO DISK
Oracle Raw Device file \Device\Harddisk6\Partition1 1011M
ORCLDISKDATA2 \Device\Harddisk7\Partition1 102390M
ORCLDISKDATA3 \Device\Harddisk8\Partition1 102390M
NTFS \Device\Harddisk9\Partition1 1019M
ORCLDISKDATA4 \Device\Harddisk10\Partition1 51183M
ORCLDISKARCH0 \Device\Harddisk11\Partition1 102390M
Oracle Raw Device file \Device\Harddisk12\Partition1 1011M
ORCLDISKARCH1 \Device\Harddisk13\Partition1 102390M
ORCLDISKDATA5 \Device\Harddisk14\Partition1 102390M
Please help..
Need little more information.
What happens when u do the following
ALTER DISKGROUP <DG> MOUNT;
If above fails, what is the message in prompt/asm_alert_log.... some history information how it got dismounted will also help.
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