Windows 平台下，使用OS files 代替raw devices，步骤如下：
1) If the ASM instance was not created, then create an ASM instance thru the DBCA .
2) Update the initialization parameter file with the next hidden parameter:
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production With the Partitioning, Oracle Label Security, OLAP and Data Mining options INSTANCE_NAME ---------------- +asm SQL> alter system set "_asm_allow_only_raw_disks"=false scope=spfile; System altered.
3) If you have real raw devices you will see them after create the ASM instance:
SQL> select path from v$asm_disk; PATH -------------------------------------------------------------------------------- //./ORCLDISKDG0 //./ORCLDISKDG1 //./ORCLDISKDATA0 //./ORCLDISKDATA1 //./ORCLDISKDATA2 //./ORCLDISKDATA3 //./ORCLDISKFRA0 //./ORCLDISKFRA1 8 rows selected.
4) Create the new directory to allocate the fake files/disks:
SQL> host mkdir d:/asmfake
5) Update the ASM instance with the new path associated with the fake directory:
SQL> alter system set asm_diskstring='//./ORCLDISK*','d:/asmfake/*' scope=both; System altered.
6) Shutdown and startup the ASM instance to apply the changes:
SQL> shutdown ASM diskgroups dismounted ASM instance shutdown SQL> startup ASM instance started Total System Global Area 83886080 bytes Fixed Size 1289028 bytes Variable Size 57431228 bytes ASM Cache 25165824 bytes ASM diskgroups mounted
SQL> show parameter asm NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ _asm_allow_only_raw_disks boolean FALSE asm_diskgroups string DATADG, FRADG asm_diskstring string //./ORCLDISK*, d:/asmfake/* asm_power_limit integer 1
7) In order to create fake files to be used as ASM disks you will need to create them thru the dd command, therefore please install the dd command for windows, you can download it from:
http://www.chrysocome.net/dd
8) Then create the desired fake disks/files on the fake directory:
SQL> host dd if=/dev/zero of=d:/asmfake/fakeasm1 bs=1k count=1000000 1000000+0 records in 1000000+0 records out SQL> host dd if=/dev/zero of=d:/asmfake/fakeasm2 bs=1k count=1000000 1000000+0 records in 1000000+0 records out SQL> host dd if=/dev/zero of=d:/asmfake/fakeasm3 bs=1k count=1000000 1000000+0 records in 1000000+0 records out SQL> host dd if=/dev/zero of=d:/asmfake/fakeasm4 bs=1k count=1000000 1000000+0 records in 1000000+0 records out SQL> host dir d:/asmfake/* Volume in drive D is New Volume Volume Serial Number is 94B6-1FC7 Directory of d:/asmfake 06/11/2008 03:00 PM <DIR> . 06/11/2008 03:00 PM <DIR> .. 06/11/2008 02:58 PM 1,024,000,000 fakeasm1 06/11/2008 02:59 PM 1,024,000,000 fakeasm2 06/11/2008 03:00 PM 1,024,000,000 fakeasm3 06/11/2008 03:01 PM 1,024,000,000 fakeasm4 4 File(s) 4,096,000,000 bytes 2 Dir(s) 19,148,734,464 bytes free
9) Connect to the ASM instance and make sure the fake disks are visible:
SQL> select path from v$asm_disk; PATH ---------------------------------------------------------- D:/ASMFAKE/FAKEASM1 D:/ASMFAKE/FAKEASM2 D:/ASMFAKE/FAKEASM3 D:/ASMFAKE/FAKEASM4 //./ORCLDISKDG0 //./ORCLDISKDG1 //./ORCLDISKDATA0 //./ORCLDISKDATA1 //./ORCLDISKDATA2 //./ORCLDISKDATA3 //./ORCLDISKFRA0 //./ORCLDISKFRA1 12 rows selected.
10) Then create diskgroup(s) using the fake disks:
SQL> create diskgroup TEST external redundancy disk 'D:/ASMFAKE/FAKEASM1', 2 'D:/ASMFAKE/FAKEASM2', 3 'D:/ASMFAKE/FAKEASM3', 4 'D:/ASMFAKE/FAKEASM4'; Diskgroup created.
SQL> select name, state from v$asm_diskgroup; NAME STATE ------------------------------ ----------- DATADG MOUNTED FRADG MOUNTED TEST MOUNTED
SQL> select name, path from v$asm_disk where group_number =3; NAME PATH ------------------------------ ---------------------------------- TEST_0000 D:/ASMFAKE/FAKEASM1 TEST_0001 D:/ASMFAKE/FAKEASM2 TEST_0002 D:/ASMFAKE/FAKEASM3 TEST_0003 D:/ASMFAKE/FAKEASM4
11) Now your new diskgroup was created using OS files.
From Oracle
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