前端之家收集整理的这篇文章主要介绍了
ORACLE 12C 三节点 RAC 无法找到候选磁盘，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
一、描述
测试安装三节点Oracle 12C RAC，笔记本配置双核i5 16g内存，每台虚机分配4G 内存。
在集群软件安装过程中，无法找到候选磁盘，如下图所示：
二、处理过程
观察磁盘头状态，发现问题的原因。因为是测试环境，共享磁盘使用的是openfiler，之前11g rac 使用了原有磁盘，这里需要dd一下，清理一下元数据，然后重新扫一下磁盘。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
知识点连接：
http://docs.oracle.com/database/122/REFRN/V-ASM_DISK.htm#REFRN30170
V$ASM_DISK@H_301_49@
了解header_status 的含义
V$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. |
原文链接：https://www.f2er.com/oracle/208021.html
