Shulou(Shulou.com)06/01 Report--

I. description

Test and install three-node Oracle 12C RAC, the notebook is equipped with dual-core i5 16g memory, and each virtual machine is allocated 4G memory.

During the installation of cluster software, the candidate disk cannot be found, as shown in the following figure:

Second, the processing process

Observe the state of the disk head and discover the cause of the problem. Because it is a test environment, the shared disk uses openfiler. Before 11g rac used the original disk, you need to dd, clean up the metadata, and then scan the disk again. The command is as follows:

[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

Knowledge point connection:

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

V$ASM_DISK

Understand the meaning of header_status

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.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.