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DBCA create disk groups will not show candidate disks

Posted on 2008-09-30
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Last Modified: 2013-12-21
I have the follwing raw devices on a solaris system.


bart.innovapost.ca:oracle:/var/opt/oracle $ ls -l /dev/rdsk/c3t10d0*
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s0 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:a,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s1 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:b,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s2 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:c,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s3 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:d,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s4 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:e,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s5 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:f,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s6 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:g,raw
lrwxrwxrwx   1 root     root          79 Jul 28 14:19 /dev/rdsk/c3t10d0s7 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,11:h,raw
bart.innovapost.ca:oracle:/var/opt/oracle $ ls -l /dev/rdsk/c3t19d0*
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s0 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:a,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s1 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:b,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s2 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:c,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s3 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:d,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s4 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:e,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s5 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:f,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s6 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:g,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t19d0s7 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,1:h,raw
bart.innovapost.ca:oracle:/var/opt/oracle $ ls -l /dev/rdsk/c3t20d0*
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s0 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:a,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s1 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:b,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s2 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:c,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s3 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:d,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s4 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:e,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s5 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:f,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s6 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:g,raw
lrwxrwxrwx   1 root     root          78 Sep  9 14:06 /dev/rdsk/c3t20d0s7 -> ../../devices/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.13502787003E9,2:h,raw

I am using DBCA to setup ASM... when I get to the Create Disk Group screen it will not show me any candidate disks. I have changed the disk discovery path. This is what is currently showing in the  init.ora

init+ASM1.ora:background_dump_dest=/oracle/app/oracle/admin/+ASM/bdump
init+ASM1.ora:core_dump_dest=/oracle/app/oracle/admin/+ASM/cdump
init+ASM1.ora:user_dump_dest=/oracle/app/oracle/admin/+ASM/udump
init+ASM1.ora:instance_type=asm
init+ASM1.ora:asm_diskgroups=''
init+ASM1.ora:asm_diskstring='/dev/rdsk/c3t10d0*','/dev/rdsk/c3t19d0*','/dev/rdsk/c3t20d0*'
init+ASM1.ora:+ASM1.instance_number=1
init+ASM1.ora:+ASM2.instance_number=2

Why is DBCA not able to discover these disks?
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Question by:ShirleyTanner
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afct earned 500 total points
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Probably because of permissions.

Following the sym links to the /devices/ to the slice you want to use.

and chown oracle:dba  (depending on the user/group of your oracle install)

I usually have my slices setup using slice 3

Part      Tag       Flag      Cylinders    
  0 unassigned    wm       0 -     8
 3 unassigned    wm      10 - 14086    (which is the remainder of my disk)



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