here are the steps to drop and re-create the disk group
check the disk size (it's 50 gb)
[root@rac1 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 15G 0 disk
└─xvda1 202:1 0 15G 0 part /
xvdf 202:80 0 50G 0 disk
└─xvdf1 202:81 0 50G 0 part /u01
xvdg 202:96 0 200G 0 disk
└─xvdg1 202:97 0 50G 0 part
xvdh 202:112 0 200G 0 disk
└─xvdh1 202:113 0 50G 0 part
xvdi 202:128 0 50G 0 disk
└─xvdi1 202:129 0 50G 0 part
xvdj 202:144 0 50G 0 disk
└─xvdj1 202:145 0 50G 0 part
xvdk 202:160 0 16G 0 disk [SWAP]
xvdl 202:176 0 200G 0 disk
└─xvdl1 202:177 0 200G 0 part
xvdm 202:192 0 200G 0 disk
└─xvdm1 202:193 0 200G 0 part
xvdn 202:208 0 150G 0 disk
└─xvdn1 202:209 0 150G 0 part /u04
[root@rac1 ~]# parted /dev/xvdg
Disk size is 200gb but allocated size/partition size is 50gb only.
Step:
1. Drop the current disk group
2. re-create partition
3. update disk UUID into dev rule
4. create a disk group with new size.
1. Drop the current disk group
SQL> alter diskgroup data mount;
Diskgroup altered.
SQL> drop diskgroup data;
Diskgroup dropped.
## Check disk is empty now.
set linesize 180
col path for a50
select path,header_status from v$asm_disk;
PATH HEADER_STATU
-------------------------------------------------- ------------
/dev/oracleasm/disk01 FORMER
/dev/oracleasm/disk02 FORMER
/dev/oracleasm/disk06 MEMBER
/dev/oracleasm/disk04 MEMBER
/dev/oracleasm/disk05 MEMBER
/dev/oracleasm/disk03 MEMBER
Note: ASM does not allow to drop disk group if it's not mounted.
2. re-create partition
#create partation
parted /dev/xvdm
mktable gpt
mkpart asmpart1 0% 100%
quit
After paration:
[root@rac1 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 15G 0 disk
└─xvda1 202:1 0 15G 0 part /
xvdf 202:80 0 50G 0 disk
└─xvdf1 202:81 0 50G 0 part /u01
xvdg 202:96 0 200G 0 disk
└─xvdg1 202:97 0 200G 0 part
xvdh 202:112 0 200G 0 disk
└─xvdh1 202:113 0 200G 0 part
xvdi 202:128 0 50G 0 disk
└─xvdi1 202:129 0 50G 0 part
xvdj 202:144 0 50G 0 disk
└─xvdj1 202:145 0 50G 0 part
xvdk 202:160 0 16G 0 disk [SWAP]
xvdl 202:176 0 200G 0 disk
└─xvdl1 202:177 0 200G 0 part
xvdm 202:192 0 200G 0 disk
└─xvdm1 202:193 0 200G 0 part
xvdn 202:208 0 150G 0 disk
└─xvdn1 202:209 0 150G 0 part /u04
3. update disk UUID into dev rule
# get UUID one by one and create file
[root@rac1 ~]# udevadm info --query=property /dev/xvdg1 | grep ID_PART_ENTRY_UUID
ID_PART_ENTRY_UUID=ad4b9fef-a590-480f-baef-627b1ef773a4
[root@rac1 ~]# udevadm info --query=property /dev/xvdh1 | grep ID_PART_ENTRY_UUID
ID_PART_ENTRY_UUID=a12f74db-fdda-491c-b65d-680da0581251
cat > /etc/udev/rules.d/99-oracle-asmdevices.rules <<EOF
KERNEL=="xvd??", ENV{ID_PART_ENTRY_UUID}=="ad4b9fef-a590-480f-baef-627b1ef773a4", SYMLINK+="oracleasm/disk01", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="xvd??", ENV{ID_PART_ENTRY_UUID}=="a12f74db-fdda-491c-b65d-680da0581251", SYMLINK+="oracleasm/disk02", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="xvd??", ENV{ID_PART_ENTRY_UUID}=="8fa30be3-244e-4f53-af2c-8d9db1492b58", SYMLINK+="oracleasm/disk03", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="xvd??", ENV{ID_PART_ENTRY_UUID}=="4885524d-4b7a-48ee-aca3-2c90d804bf79", SYMLINK+="oracleasm/disk04", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="xvd??", ENV{ID_PART_ENTRY_UUID}=="560d278a-22b6-4afe-9a3e-63d568b27f26", SYMLINK+="oracleasm/disk05", OWNER="oracle", GROUP="dba", MODE="0660"
KERNEL=="xvd??", ENV{ID_PART_ENTRY_UUID}=="627edeac-5dbc-41b4-b36e-475277b43722", SYMLINK+="oracleasm/disk06", OWNER="oracle", GROUP="dba", MODE="0660"
EOF
## Validate that disks are visible
[root@rac1 ~]# ls -al /dev/oracleasm/*
lrwxrwxrwx. 1 root root 8 Jul 30 15:56 /dev/oracleasm/disk01 -> ../xvdg1
lrwxrwxrwx. 1 root root 8 Jul 30 15:56 /dev/oracleasm/disk02 -> ../xvdh1
lrwxrwxrwx. 1 root root 8 Jul 30 15:56 /dev/oracleasm/disk03 -> ../xvdi1
lrwxrwxrwx. 1 root root 8 Jul 30 15:56 /dev/oracleasm/disk04 -> ../xvdj1
lrwxrwxrwx. 1 root root 8 Jul 30 15:56 /dev/oracleasm/disk05 -> ../xvdl1
lrwxrwxrwx. 1 root root 8 Jul 30 15:56 /dev/oracleasm/disk06 -> ../xvdm1
4. create a disk group with new size.
CREATE DISKGROUP RECO1 EXTERNAL REDUNDANCY DISK '/dev/oracleasm/disk01','/dev/oracleasm/disk02';# Check diskgroup
[grid@rac1 ~]$ asmcmd lsdg
State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
MOUNTED EXTERN N 512 4096 1048576 409596 219377 0 219377 0 N DATA1/
MOUNTED EXTERN N 512 4096 1048576 409596 409542 0 409542 0 N RECO1/
MOUNTED NORMAL N 512 4096 1048576 102396 100412 0 50206 0 N REDO/
Note: I am droppping the diskgroup here so be c
