Disk Management Part asm

Jun 30 posted in Oracle (RSS), 303 views.

asm add linux on the disk into the disk method
[root @ localhost init.d] # fdisk / dev / sdd

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Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-261, default 1): 130
Last cylinder or + size or + sizeM or + sizeK (130-261, default 261):
Using default value 261

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Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (1-261, default 1):
Using default value 1
Last cylinder or + size or + sizeM or + sizeK (1-129, default 129):
Using default value 129

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Command (m for help): w
The partition table has been altered!

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Calling ioctl () to re-read partition table.
Syncing disks.
[root @ localhost init.d] # fdisk-l
skiping ................
Disk / dev / sdd: 2147 MB, 2147483648 bytes
255 heads, 63 sectors / track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

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Device Boot Start End Blocks Id System
/ dev/sdd1 130 261 1060 290 83 Linux
/ dev/sdd2 1 129 1036161 83 Linux

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Partition table entries are not in disk order
[root @ localhost init.d] #
Create asm disk

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[root @ localhost init.d] #. / oracleasm createdisk VOL5 / dev/sdd1
Marking disk "VOL5" as an ASM disk: [OK]
[root @ localhost init.d] #. / oracleasm createdisk VOL6 / dev/sdd2
Marking disk "VOL6" as an ASM disk: [OK]

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Create a disk group
[root @ localhost init.d] # su - oracle
[oracle @ localhost ~] $ export ORACLE_SID = + ASM
[oracle @ localhost ~] $ sqlplus "/ as sysdba"

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SQL * Plus: Release 10.2.0.1.0 - Production on Tue Jun 30 10:31:42 2009

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Copyright (c) 1982, 2005, Oracle. All rights reserved.

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Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

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SQL> create diskgroup disk_group_3 normal redundancy
2 failgroup VOL6 disk 'ORCL: VOL6' name VOL6
3 failgroup VOL5 disk 'ORCL: VOL5' name vol5;

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Diskgroup created.

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SQL> drop diskgroup disk_group_3 including contents; to delete the disk group

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Diskgroup dropped.

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SQL>

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- Add to asm disk into the disk group already exists, the

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SQL> l
1 * alter diskgroup disk_group_1 add disk 'ORCL: VOL5'
SQL> /

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Diskgroup altered.

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Add to delete the disk

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SQL> l
1 select group_number, disk_number, name, label, path from v $ asm_disk
2 *
SQL> /

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GROUP_NUMBER DISK_NUMBER NAME LABEL PATH
------------ ----------- ----- ----- ----------
0 0 VOL6 ORCL: VOL6
1 0 VOL1 VOL1 ORCL: VOL1
1 1 VOL2 VOL2 ORCL: VOL2
2 0 VOL3 VOL3 ORCL: VOL3
2 1 VOL4 VOL4 ORCL: VOL4
1 2 VOL5 VOL5 ORCL: VOL5
SQL> alter diskgroup disk_group_1 drop disk VOL5;

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Diskgroup altered.

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select group_number, disk_number, bytes_written/1024/1024 from v $ asm_disk_stat
1 0 79.74072265625
1 1 77.85791015625
2 0 41.99072265625
2 1 41.99072265625
1 2 3.8515625
Disk2 in vol5 which can be reduced to 4MB;
Can also write a resize, if small, will be the following error

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SQL> alter diskgroup disk_group_1 resize disk VOL5 size 3M;
alter diskgroup disk_group_1 resize disk VOL5 size 3M
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ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15037: disk 'ORCL: VOL5' is smaller than mimimum of 4 MBs

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SQL> c / 3 / 4
1 * alter diskgroup disk_group_1 resize disk VOL5 size 4M
SQL> /

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Diskgroup altered.

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The second group are 41MB, so the first set to 50MB;

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SQL> alter diskgroup disk_group_2 resize all size 50M;

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Diskgroup altered.

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