ASMCMD> md_backup /backup/asm_config_backup.txt

ASMCMD> cat /backup/asm_config_backup.txt
[DATA_DG]
State: MOUNTED
Type: NORMAL
Redundancy: NORMAL
AU Size: 4194304 (4 MB)
System Created: NO
Compatible.asm: 19.0.0.0.0
Compatible.rdbms: 19.0.0.0.0
Compatible.advm: 19.0.0.0.0
DiskCount: 2

[DATA_DG.DGDATA_0000]
Path: /dev/sdb1

[DATA_DG.DGDATA_0001]
Path: /dev/sdc1

[LOG_DG]
State: MOUNTED
Type: NORMAL
Redundancy: NORMAL
AU Size: 4194304 (4 MB)
System Created: NO
Compatible.asm: 19.0.0.0.0
Compatible.rdbms: 19.0.0.0.0
Compatible.advm: 19.0.0.0.0
DiskCount: 2

[LOG_DG.LOG_DG_0000]
Path: /dev/sdd1

[LOG_DG.LOG_DG_0001]
Path: /dev/sde1

— 1. 使用RMAN备份ASM文件
RMAN>
BACKUP AS COPY
DATAFILE ‘+dgdata/fgedudb/datafile/users01.dbf’
TO ‘/backup/users01.dbf’;– 2. 使用RMAN恢复ASM文件
RMAN>
RESTORE AS COPY
DATAFILE ‘/backup/users01.dbf’
TO ‘+dgdata/fgedudb/datafile/users01.dbf’;– 3. 备份控制文件到ASM
ALTER DATABASE BACKUP CONTROLFILE TO ‘+dgdata/fgedudb/controlfile/control03.ctl’ REUSE;– 4. 备份spfile到ASM
CREATE PFILE=’+dgdata/fgedudb/pfile/initorcl.ora’ FROM SPFILE;CREATE SPFILE=’+dgdata/fgedudb/spfile/spfileorcl.ora’ FROM PFILE=’+dgdata/fgedudb/pfile/initorcl.ora’;– 5. 备份归档日志到ASM
ALTER SYSTEM ARCHIVE LOG CURRENT;– 6. 查看ASM文件信息
SELECT af.name, af.type, af.bytes, adg.name AS diskgroup_name
FROM v$asm_file af, v$asm_diskgroup adg
WHERE af.group_number = adg.group_number;– 7. 备份整个数据库到ASM
RMAN>
BACKUP DATABASE PLUS ARCHIVELOG;

— 1. 备份ASM磁盘组配置
ALTER DISKGROUP data_dg BACKUP DISK TO ‘/backup/asm_data_config.bkp’;– 2. 查看磁盘组信息
SELECT name, state, type, total_mb, free_mb FROM v$asm_diskgroup;– 3. 重新创建磁盘组
DROP DISKGROUP data_dg INCLUDING CONTENTS;CREATE DISKGROUP data_dg NORMAL REDUNDANCY
FAILGROUP fg1 DISK ‘/dev/sdb1’, ‘/dev/sdc1’
FAILGROUP fg2 DISK ‘/dev/sdd1’, ‘/dev/sde1’
ATTRIBUTE ‘compatible.asm’ = ‘19.0.0’, ‘compatible.rdbms’ = ‘19.0.0’;– 4. 恢复ASM文件
RMAN>
RESTORE DATABASE;RECOVER DATABASE;– 5. 使用ASMCMD工具复制文件
$ asmcmd
ASMCMD> cp +dgdata/fgedudb/datafile/users01.dbf /backup/users01.dbf
ASMCMD> cp /backup/users01.dbf +dgdata/fgedudb/datafile/users01.dbf

— 6. 备份ASM元数据
$ asmcmd
ASMCMD> md_backup /backup/asm_metadata_backup.txt

— 7. 恢复ASM元数据
$ asmcmd
ASMCMD> md_restore /backup/asm_metadata_backup.txt

— 案例：为企业应用系统进行ASM备份与恢复

— 1. 检查ASM实例状态
SELECT instance_name, status FROM v$instance;– 2. 查看磁盘组状态
SELECT name, state, type, total_mb, free_mb FROM v$asm_diskgroup;– 3. 备份ASM配置
$ asmcmd
ASMCMD> md_backup /backup/asm_config_backup.txt

— 4. 备份ASM文件
RMAN>
BACKUP DATABASE PLUS ARCHIVELOG;– 5. 备份ASM磁盘组配置
ALTER DISKGROUP data_dg BACKUP DISK TO ‘/backup/asm_data_config.bkp’;ALTER DISKGROUP log_dg BACKUP DISK TO ‘/backup/asm_log_config.bkp’;ALTER DISKGROUP arch_dg BACKUP DISK TO ‘/backup/asm_arch_config.bkp’;– 6. 模拟磁盘故障
ALTER DISKGROUP data_dg DROP DISK ‘DGDATA_0000’ FORCE;– 7. 恢复ASM磁盘
ALTER DISKGROUP data_dg ADD DISK ‘/dev/sdf1’;– 8. 重平衡磁盘组
ALTER DISKGROUP data_dg REBALANCE POWER 11;– 9. 监控重平衡状态
SELECT group_number, operation, state, power, sofar, est_work, est_rate, est_minutes FROM v$asm_operation;– 10. 验证磁盘组状态
SELECT name, state, type, total_mb, free_mb FROM v$asm_diskgroup;– 11. 验证文件状态
SELECT af.name, af.type, af.bytes, adg.name AS diskgroup_name
FROM v$asm_file af, v$asm_diskgroup adg
WHERE af.group_number = adg.group_number;– 12. 恢复数据库
RMAN>
RESTORE DATABASE;RECOVER DATABASE;– 13. 打开数据库
ALTER DATABASE OPEN;– 14. 验证数据库状态
SELECT instance_name, status FROM v$instance;SELECT open_mode FROM v$database;

— 1. 备份失败问题
— 查看RMAN备份日志
RMAN>
LIST BACKUP;– 解决方案：检查备份存储空间，确保有足够的空间

— 2. 恢复失败问题
— 查看RMAN恢复日志
RMAN>
LIST FAILURE;– 解决方案：检查备份文件是否存在，确保备份文件完整

— 3. ASM配置恢复失败问题
— 查看ASM告警日志
SELECT * FROM v$diag_info;– 解决方案：检查备份配置文件是否完整，确保磁盘可访问

— 4. 磁盘组恢复失败问题
— 查看磁盘组状态
SELECT name, state, type, total_mb, free_mb FROM v$asm_diskgroup;– 解决方案：检查磁盘状态，确保磁盘可访问，重新创建磁盘组

— 5. 文件恢复失败问题
— 查看文件状态
SELECT af.name, af.type, af.bytes, adg.name AS diskgroup_name
FROM v$asm_file af, v$asm_diskgroup adg
WHERE af.group_number = adg.group_number;– 解决方案：使用RMAN恢复损坏的文件
RMAN>
RESTORE DATAFILE ‘+dgdata/fgedudb/datafile/users01.dbf’;RECOVER DATAFILE ‘+dgdata/fgedudb/datafile/users01.dbf’;

— 1. 备份失败
— 查看RMAN备份日志
RMAN>
LIST BACKUP;– 解决方案：检查备份存储空间，确保有足够的空间

— 2. 恢复失败
— 查看RMAN恢复日志
RMAN>
LIST FAILURE;– 解决方案：检查备份文件是否存在，确保备份文件完整

— 3. ASM配置恢复失败
— 查看ASM告警日志
SELECT * FROM v$diag_info;– 解决方案：检查备份配置文件是否完整，确保磁盘可访问

— 4. 磁盘组恢复失败
— 查看磁盘组状态
SELECT name, state, type, total_mb, free_mb FROM v$asm_diskgroup;– 解决方案：检查磁盘状态，确保磁盘可访问，重新创建磁盘组

— 5. 文件恢复失败
— 查看文件状态
SELECT af.name, af.type, af.bytes, adg.name AS diskgroup_name
FROM v$asm_file af, v$asm_diskgroup adg
WHERE af.group_number = adg.group_number;– 解决方案：使用RMAN恢复损坏的文件
RMAN>
RESTORE DATAFILE ‘+dgdata/fgedudb/datafile/users01.dbf’;RECOVER DATAFILE ‘+dgdata/fgedudb/datafile/users01.dbf’;