ASMCMD命令拷贝文件报错ORA15046 （转）

尝试使用ASMCMD拷贝数据文件时出现这个错误。 

使用ASM将磁盘组文件拷贝到文件系统没有问题：

bash-3.00$ export ORACLE_SID=+ASM2

bash-3.00$ asmcmd

ASMCMD> ls

DATA/

ASMCMD> cd DATA

ASMCMD> cd RACTEST

ASMCMD> cd DATAFILE

ASMCMD> ls

SYSAUX.260.664395357

SYSTEM.259.664395355

SYSTEM.268.664468131

UNDOTBS1.261.664395359

UNDOTBS2.263.664395371

USERS.264.664395373

ASMCMD> cp USERS.264.664395373 /data/USERS.264.664395373

source +DATA/RACTEST/DATAFILE/USERS.264.664395373

target /data/USERS.264.664395373

copying file(s)...

file, /data/USERS.264.664395373, copy committed.

下面尝试将操作系统上的这个文件拷贝回ASM的不同目录下：

ASMCMD> cp /data/USERS.264.664395373 +DATA/RACTEST/backup/USERS.264.664395373

source /data/USERS.264.664395373

target +DATA/RACTEST/backup/USERS.264.664395373

ASMCMD-08015: can not create file->'+DATA/RACTEST/backup/USERS.264.664395373'

ORA-15056: additional error message

ORA-17502: ksfdcre:4 Failed to create file +DATA/ractest/backup/users.264.664395373

ORA-15046: ASM file name '+DATA/ractest/backup/users.264.664395373' is not in single-file creation form

ORA-06512: at "SYS.X$DBMS_DISKGROUP", line 142

ORA-06512: at line 3 (DBD ERROR: OCIStmtExecute)

ASMCMD-08016: copy source->'/data/USERS.264.664395373' and target->'+DATA/RACTEST/backup/USERS.264.664395373' failed

这个问题其实也很简单，用户在拷贝到ASM上的时候不要指定文件后面的数值，这是Oracle的ASM用来进行标识的信息。

Oracle在文档Doc ID:Note:452158.1中进行详细的描述：

ASMCMD> cp /data/USERS.264.664395373 +DATA/RACTEST/backup/USERS

source /data/USERS.264.664395373

target +DATA/RACTEST/backup/USERS

copying file(s)...

file, +DATA/ractest/backup/users, copy committed.

注意一点，虽然这样拷贝成功了，但是ASM其实并没有完全根据命令将数据文件拷贝到指定的目录：

ASMCMD> cd +DATA/RACTEST/backup/

ASMCMD> ls

02jplh5q_1_1

users

ASMCMD> ls -l

Type Redund Striped Time Sys Name

 N 02jplh5q_1_1 => +DATA/ASMTESTING/BACKUPSET/TESTING.269.664454477

 N users => +DATA/ASMTESTING/DATAFILE/TESTING.268.664645347

ASMCMD> cd +DATA/ASMTESTING/DATAFILE/

ASMCMD> ls

TESTING.268.664645347

ASM只是在目标目录下存储了一个alias，真正的文件被ASM放到了其他的位置。