AMDU-00210: No disks found in diskgroup DATA2

在使用amdu导出数据文件的时候报错如下：

[[email protected] ~]$ amdu -diskstring '/dev/sdb3'  -extract data2.256                    

amdu_2016_05_29_17_19_10/

AMDU-00210: No disks found in diskgroup DATA2

AMDU-00210: No disks found in diskgroup DATA2

我这里使用了asmlib将/dev/sdb3创建成了vol3这个磁盘组

如果用磁盘组的路径就可以导出

[[email protected] ~]$ amdu -diskstring '/dev/oracleasm/disks/VOL3'  -extract data2.256

amdu_2016_05_29_17_19_58/

[[email protected] ~]$ cd amdu_2016_05_29_17_19_58/

[[email protected] amdu_2016_05_29_17_19_58]$ ll

total 51208

-rw-r--r-- 1 grid oinstall 52429312 May 29 17:20 DATA2_256.f

-rw-r--r-- 1 grid oinstall     3696 May 29 17:20 report.txt

[[email protected] amdu_2016_05_29_17_19_58]$ cat report.txt 

-*-amdu-*-

******************************* AMDU Settings ********************************

ORACLE_HOME = /app/grid/product/11.2.0

System name:    Linux

Node name:      rac1

Release:        3.8.13-44.1.1.el6uek.x86_64

Version:        #2 SMP Wed Sep 10 06:10:25 PDT 2014

Machine:        x86_64

amdu run:       29-MAY-16 17:19:58

Endianess:      1

--------------------------------- Operations ---------------------------------

    -extract DATA2.256

------------------------------- Disk Selection -------------------------------

 -diskstring '/dev/oracleasm/disks/VOL3'

------------------------------ Reading Control -------------------------------

------------------------------- Output Control -------------------------------

********************************* DISCOVERY **********************************

----------------------------- DISK REPORT N0001 ------------------------------

                Disk Path: /dev/oracleasm/disks/VOL3

           Unique Disk ID: 

               Disk Label: 

     Physical Sector Size: 512 bytes

                Disk Size: 18402 megabytes

               Group Name: DATA2

                Disk Name: VOL3

       Failure Group Name: VOL3

              Disk Number: 0

            Header Status: 3

       Disk Creation Time: 2016/02/18 00:24:59.282000

          Last Mount Time: 2016/05/29 17:15:41.742000

    Compatibility Version: 0x0b200000(11020000)

         Disk Sector Size: 512 bytes

         Disk size in AUs: 18402 AUs

         Group Redundancy: 1

      Metadata Block Size: 4096 bytes

                  AU Size: 1048576 bytes

                   Stride: 113792 AUs

      Group Creation Time: 2016/02/18 00:24:59.203000

  File 1 Block 1 location: AU 2

              OCR Present: NO

***************** Slept for 6 seconds waiting for heartbeats *****************

************************** SCANNING DISKGROUP DATA2 **************************

            Creation Time: 2016/02/18 00:24:59.203000

         Disks Discovered: 1

               Redundancy: 1

                  AU Size: 1048576 bytes

      Metadata Block Size: 4096 bytes

     Physical Sector Size: 512 bytes

          Metadata Stride: 113792 AU

   Duplicate Disk Numbers: 0

---------------------------- SCANNING DISK N0001 -----------------------------

Disk N0001: '/dev/oracleasm/disks/VOL3'

           Allocated AU's: 1986

                Free AU's: 16416

       AU's read for dump: 0

       Block images saved: 0

        Map lines written: 0

          Heartbeats seen: 0

  Corrupt metadata blocks: 0

        Corrupt AT blocks: 0

------------------------ SUMMARY FOR DISKGROUP DATA2 -------------------------

           Allocated AU's: 1986

                Free AU's: 16416

       AU's read for dump: 0

       Block images saved: 0

        Map lines written: 0

          Heartbeats seen: 0

  Corrupt metadata blocks: 0

        Corrupt AT blocks: 0

************************* EXTRACTING FILE DATA2.256 **************************

            Creating file: DATA2_256.f

         Extraction wrote: 52429312 bytes

              Stripe size: 1048576 bytes

           Stripe columns: 1

            Mirror copies: 1

               Block size: 512 bytes

                File size: 102401 blocks

                File type: 3

           Extent size #1: 4294967295 extents of  1 AUs

           Extent size #2:          0 extents of  1 AUs

           Extent size #3:          0 extents of  1 AUs

           Extent size #4: 4294967295 extents of  1 AUs

            Creation time: 2016/02/18 04:43:08.262000

            Modified time: 2016/05/29 14:00:00.000000

     Data extents in file: 51

       Data extents found: 51

         Blocks not found: 0 blocks

******************************* END OF REPORT ********************************

最简单的方法就是不知道diskstring

[[email protected] ~]$ amdu -extract data2.256                                         

amdu_2016_05_29_17_27_06/

AMDU-00204: Disk N0003 is in currently mounted diskgroup DATA2

AMDU-00201: Disk N0003: 'ORCL:VOL3'