Resizing disks - ASM mulpath

Posted by satish on
URL: http://erman-arslan-s-oracle-forum.114.s1.nabble.com/Resizing-disks-ASM-mulpath-tp7113.html

Hi Erman,


we are using RAC and maultipathing
Our version 12.1.0.2

we have a planned activity of Resizing Of ASM Disks.Our storage administrator requested us to give the correct disk names,so that he can cross check before extending.

To get correct disks we looked into ASM as follows


select g.name
     , d.path
     , d.os_mb
     , d.total_mb
from v$asm_diskgroup g
   , v$asm_disk      d
where g.group_number = d.group_number
and   g.name = 'FRADG'
/

NAME       PATH                 OS_MB   TOTAL_MB
---------- --------------- ---------- ----------
FRADG      ORCL:ARCHDISK1      102398     102396
FRADG      ORCL:ARCHDISK5      102398     102396
FRADG      ORCL:ARCHDISK4      102398     102396
FRADG      ORCL:ARCHDISK3      102398     102396
FRADG      ORCL:ARCHDISK2      102398     102396

SQL>

[gridprod@node1dev]$ ls -l /dev/oracleasm/disks/ARCH*
brw-rw---- 1 gridprod asmadmin 253, 69 Apr 23  2018 /dev/oracleasm/disks/ARCHDISK1
brw-rw---- 1 gridprod asmadmin 253, 76 Apr 23  2018 /dev/oracleasm/disks/ARCHDISK2
brw-rw---- 1 gridprod asmadmin 253, 75 Apr 23  2018 /dev/oracleasm/disks/ARCHDISK3
brw-rw---- 1 gridprod asmadmin 253, 77 Apr 23  2018 /dev/oracleasm/disks/ARCHDISK4
brw-rw---- 1 gridprod asmadmin 253, 78 Apr 23  2018 /dev/oracleasm/disks/ARCHDISK5
[gridprod@node1dev]$


This gives is the major and minor numbers for the disks – major number is 253 and minor numbers are 69,76,75,77,78

Then comparing these numbers against the devices listed in /dev/mapper and got the below output which is not clear to me

[gridprod@erpproddb1 dev]$ ls -l /dev/mapper/*ARCH*
lrwxrwxrwx 1 root root 8 Jun 22  2018 /dev/mapper/PRD-ARCH01 -> ../dm-19
lrwxrwxrwx 1 root root 8 Apr 23  2018 /dev/mapper/PRD-ARCH01p1 -> ../dm-69
lrwxrwxrwx 1 root root 8 Jun 22  2018 /dev/mapper/PRD-ARCH02 -> ../dm-17
lrwxrwxrwx 1 root root 8 Apr 23  2018 /dev/mapper/PRD-ARCH02p1 -> ../dm-76
lrwxrwxrwx 1 root root 8 Jun 22  2018 /dev/mapper/PRD-ARCH03 -> ../dm-20
lrwxrwxrwx 1 root root 8 Apr 23  2018 /dev/mapper/PRD-ARCH03p1 -> ../dm-75
lrwxrwxrwx 1 root root 8 Jun 22  2018 /dev/mapper/PRD-ARCH04 -> ../dm-21
lrwxrwxrwx 1 root root 8 Apr 23  2018 /dev/mapper/PRD-ARCH04p1 -> ../dm-77
lrwxrwxrwx 1 root root 8 Jun 22  2018 /dev/mapper/PRD-ARCH05 -> ../dm-22
lrwxrwxrwx 1 root root 8 Apr 23  2018 /dev/mapper/PRD-ARCH05p1 -> ../dm-78
[gridprod@node1dev]$


could you please help in getting the disknames to provide them to administrator

Thank you for the support