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This article mainly introduces the asmdisk corresponding disk partition information is what, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor with you to understand.

Orcl: in asm_diskstring='orcl:*' is a default way of oracle, which corresponds to the / dev/oracleasm/disks directory by default.

The parameter asm_diskstring of ASM instance is empty. By default, only / dev/raw and / dev/oracleasm/disks (ORCL:) directories will be found.

You can also understand why when you create an ASM disk group, the ASM disk name should be preceded by ORCL:, just like the file, it should specify the path + file name.

The disk partition information corresponding to asmdisk. The general step is to find the asmdisk for asmcmd lsdsk, and then match it in / dev or / dev/mapper directory.

Asmcmd lsdsk displays asmdisk information that already exists in asmdisk_group

[oracle@GI_Softwareonly_64 ~] $asmcmd lsdsk

Path

/ dev/oracleasm/disks/DATA1

/ dev/oracleasm/disks/DATA2

[oracle@GI_Softwareonly_64 ~] $ll / dev/oracleasm/disks/DATA1

Brw-rw---- 1 oracle dba 8, 17 Oct 14 10:52 / dev/oracleasm/disks/DATA1

[oracle@GI_Softwareonly_64 ~] $ll / dev | grep 8 | grep 17

Brw-r- 1 root disk 8, 17 Oct 14 09:58 sdb1

The mode of UDEV

[grid@pdb02 ~] $asmcmd lsdsk

Path

/ dev/plmdb

[grid@pdb02 ~] $ll / dev/plmdb

Lrwxrwxrwx. 1 root root 3 Nov 27 16:30 / dev/plmdb-> sdc

UDEV multipath mode

[grid@pdba ~] $asmcmd lsdsk

Path

/ dev/plm_db_arch

/ dev/plm_db_data

[grid@pdba ~] $ll / dev/plm_db_arch

Lrwxrwxrwx. 1 root root 4 November 27 15:52 / dev/plm_db_arch-> dm-3

[grid@pdba ~] $ll / dev | grep dm-3

Brw-rw----. 1 grid asmadmin 253, 3 November 27 16:49 dm-3

Lrwxrwxrwx. 1 root root 4 November 27 15:52 plm_db_arch-> dm-3

[grid@pdba ~] $ll / dev/mapper | grep dm-3

Lrwxrwxrwx. 1 root root 7 November 27 15:52 HP-3PAR-ARCH50->.. / dm-3

[grid@pdba ~] $fdisk-l | grep HP-3PAR-ARCH50

Disk / dev/mapper/HP-3PAR-ARCH50: 536.9 GB, 536870912000 bytes

Check for asmdisk that is not in asmdiskgroup (that is, asmdisk that is not used)

[oracle@GI_Softwareonly_64] $asmcmd lsdsk-- candidate

Path

/ dev/oracleasm/disks/DATA3

Thank you for reading this article carefully. I hope the article "what is the disk partition information corresponding to asmdisk" shared by the editor will be helpful to you. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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