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ORACLE 12C 三節點 RAC 無法找到候選磁盤

發布時間:2020-09-07 21:11:06 來源:網絡 閱讀:456 作者:roidba 欄目:關系型數據庫


一、描述

測試安裝三節點Oracle 12C RAC,筆記本配置雙核i5 16g內存,每臺虛機分配4G 內存。

在集群軟件安裝過程中,無法找到候選磁盤,如下圖所示:


ORACLE 12C 三節點 RAC 無法找到候選磁盤


ORACLE 12C 三節點 RAC 無法找到候選磁盤


二、處理過程

觀察磁盤頭狀態,發現問題的原因。因為是測試環境,共享磁盤使用的是openfiler,之前11g rac 使用了原有磁盤,這里需要dd一下,清理一下元數據,然后重新掃一下磁盤。命令如下:

[root@rac01 rules.d]# dd if=/dev/zero of=/dev/sde bs=4096 count=256
256+0 records in
256+0 records out
1048576 bytes (1.0 MB) copied, 0.00297706 s, 352 MB/s
[root@rac01 rules.d]# dd if=/dev/zero of=/dev/sdf bs=4096 count=256
256+0 records in
256+0 records out
1048576 bytes (1.0 MB) copied, 0.00189521 s, 553 MB/s


知識點連接:

http://docs.oracle.com/database/122/REFRN/V-ASM_DISK.htm#REFRN30170

V$ASM_DISK

了解header_status 的含義

V$ASM_DISK displays one row for every disk discovered by the Oracle Automatic Storage Management (Oracle ASM) instance, including disks that are not part of any disk group.

HEADER_STATUS

VARCHAR2(12)

Per-instance status of the disk as seen by discovery:

  • UNKNOWN - Oracle ASM disk header has not been read

  • CANDIDATE - Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement

  • INCOMPATIBLE - Version number in the disk header is not compatible with the Oracle ASM software version

  • PROVISIONED - Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement. The PROVISIONED header status is different from the CANDIDATE header status in that PROVISIONED implies that an additional platform-specific action has been taken by an administrator to make the disk available for Oracle ASM.

  • MEMBER - Disk is a member of an existing disk group. No attempt should be made to add the disk to a different disk group. The ALTER DISKGROUP statement will reject such an addition unless overridden with the FORCE option.

  • FORMER - Disk was once part of a disk group but has been dropped cleanly from the group. It may be added to a new disk group with the ALTER DISKGROUP statement.

  • CONFLICT - Oracle ASM disk was not mounted due to a conflict

  • FOREIGN - Disk contains data created by an Oracle product other than Oracle ASM. This includes data files, logfiles, and OCR disks.




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