====== ASM Identifier les disque OS VS ASM ======
__**Méthode 1**__
  * on liste les diskgroup et les disk ASM les constituants:
<code PLSQL>
[grid@oracle2 ~]$ sqlplus / as sysasm

SQL*Plus: Release 19.0.0.0.0 - Production on Sun Oct 26 16:59:04 2025
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SQL> SET lines 800
column disk_group_name format a30
column PATH format a50
column disk_file_name format a30
column FAILGROUP_TYPE format a20
SELECT NVL(a.name, '[CANDIDATE]') disk_group_name, b.PATH, b.name disk_file_name, a.TYPE,b.TOTAL_MB/1024 TOTAL_GB
FROM v$asm_diskgroup a RIGHT OUTER JOIN v$asm_disk b USING (group_number)
ORDER BY a.name;

DISK_GROUP_NAME 	       PATH						  DISK_FILE_NAME		 TYPE	  TOTAL_GB
------------------------------ -------------------------------------------------- ------------------------------ ------ ----------
DATA			       /dev/oracleasm/disks/ASM_DATA5			  DATA_0004			 NORMAL 19.9990234
DATA			       /dev/oracleasm/disks/ASM_DATA6			  DATA_0005			 NORMAL 19.9990234
DATA			       /dev/oracleasm/disks/ASM_DATA4			  DATA_0003			 NORMAL 19.9990234
FRA			       /dev/oracleasm/disks/ASM_FRA1			  FRA_0000			 EXTERN 39.9990234
OCR			       /dev/oracleasm/disks/ASM_OCR2			  OCR_0001			 NORMAL 9.99609375
OCR			       /dev/oracleasm/disks/ASM_OCR1			  OCR_0002			 NORMAL 9.99609375
OCR			       /dev/oracleasm/disks/ASM_OCR3			  OCR_0000			 NORMAL 9.99609375

</code>

  * on fait le lien entre le disque OS et le nom de disque ASM
<code BASH>
[grid@oracle2 ~]$ blkid | grep asm


/dev/sdb1: LABEL="ASM_DATA1" TYPE="oracleasm" 
/dev/sdc1: LABEL="ASM_DATA3" TYPE="oracleasm" 
/dev/sdd1: LABEL="ASM_OCR1" TYPE="oracleasm" 
/dev/sde1: LABEL="ASM_OCR2" TYPE="oracleasm" 
/dev/sdf1: LABEL="ASM_OCR3" TYPE="oracleasm" 
/dev/sdg1: LABEL="ASM_FRA1" TYPE="oracleasm" 
/dev/sdh1: LABEL="ASM_DATA4" TYPE="oracleasm" 
/dev/sdi1: LABEL="ASM_DATA5" TYPE="oracleasm" 
/dev/sdj1: LABEL="ASM_DATA6" TYPE="oracleasm" 
</code>

  * on peut éventuellement croiser avec la taille du disque
<code BASH>
[grid@oracle2 ~]$ lsblk | grep sdg
sdg                 8:96   0   40G  0 disk 
└─sdg1              8:97   0   40G  0 part 

</code>
__**Méthode 2**__
  * on liste les disques ASM
<code BASH>
[root@oracle3 ~]# oracleasm listdisks
ASM_DATA1
ASM_DATA2
ASM_DATA3
ASM_FRA1
ASM_OCR1
ASM_OCR2
ASM_OCR3
</code>

  * on liste les détail du disque ASM
<code BASH>
[root@oracle2 bin]# oracleasm querydisk -d ASM_FRA1
Disk "ASM_FRA1" is a valid ASM disk on device [8,97]
 
</code>

  * on liste les disques OS, ici notre disque //ASM_FRA1// est le 8,97, soit ////dev/sdg1//
<code BASH>
[root@oracle3 ~]# ls -ltr /dev/sd*
brw-rw----. 1 root disk 8,  0 19 oct.  12:47 /dev/sda
brw-rw----. 1 root disk 8, 16 19 oct.  12:47 /dev/sdb
brw-rw----. 1 root disk 8, 32 19 oct.  12:47 /dev/sdc
brw-rw----. 1 root disk 8, 48 19 oct.  12:47 /dev/sdd
brw-rw----. 1 root disk 8, 64 19 oct.  12:47 /dev/sde
brw-rw----. 1 root disk 8, 96 19 oct.  12:47 /dev/sdg
brw-rw----. 1 root disk 8, 80 19 oct.  12:47 /dev/sdf
brw-rw----. 1 root disk 8,  1 19 oct.  12:47 /dev/sda1
brw-rw----. 1 root disk 8, 17 19 oct.  12:47 /dev/sdb1
brw-rw----. 1 root disk 8, 33 19 oct.  12:47 /dev/sdc1
brw-rw----. 1 root disk 8, 49 19 oct.  12:47 /dev/sdd1
brw-rw----. 1 root disk 8, 65 19 oct.  12:47 /dev/sde1
brw-rw----. 1 root disk 8, 97 19 oct.  12:47 /dev/sdg1
brw-rw----. 1 root disk 8, 81 19 oct.  12:47 /dev/sdf1

[root@oracle3 ~]# lsblk /dev/sdb1
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdb1   8:17   0  20G  0 part 

</code>

  * on peut éventuellement croiser avec la taille du disque
<code BASH>
[grid@oracle2 ~]$ lsblk | grep sdg
sdg                 8:96   0   40G  0 disk 
└─sdg1              8:97   0   40G  0 part 

</code>