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ASM磁盘故障诊断(二)

原创 Linux操作系统 作者:yangtingkun 时间:2011-07-26 23:04:36 0 删除 编辑

一个客户的RAC环境出现了故障,一个节点操作系统崩溃,重装系统后,CLUSTER添加成功,但是ASM实例添加报错。

这一篇描述问题的解决。

ASM磁盘故障诊断(一):http://yangtingkun.itpub.net/post/468/521325

 

 

上一篇介绍了ASM磁盘组目前的问题,也确定了解决方向,修改ASM磁盘的头信息。

想要修改ASM磁盘头信息,要借助Oracle的工具kfed,而默认这个工具是没有编译的,进入$ORACLE_HOME/lib目录,对kfed工具信息编译:

[oracle@node1 lib]$ make -f ins_rdbms.mk ikfed

Linking KFED utility (kfed)
rm -f /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/kfed
gcc -o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/kfed -L/u01/app/oracle/product/10.2.0/db_1/rdbms/lib/ -L/u01/app/oracle/product/10.2.0/db_1/lib/ -L/u01/app/oracle/product/10.2.0/db_1/lib/stubs/ /u01/app/oracle/product/10.2.0/db_1/lib/s0main.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/sskfeded.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skfedpt.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/defopt.o -ldbtools10 -lclntsh `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags` -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lnro10 `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags` -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lclient10 -lnnetd10 -lvsn10 -lcommon10 -lgeneric10 -lmm -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags` -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lnro10 `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags` -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lclient10 -lnnetd10 -lvsn10 -lcommon10 -lgeneric10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 -lclient10 -lnnetd10 -lvsn10 -lcommon10 -lgeneric10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 `cat /u01/app/oracle/product/10.2.0/db_1/lib/sysliblist` -Wl,-rpath,/u01/app/oracle/product/10.2.0/db_1/lib -lm `cat /u01/app/oracle/product/10.2.0/db_1/lib/sysliblist` -ldl -lm -L/u01/app/oracle/product/10.2.0/db_1/lib
mv -f /u01/app/oracle/product/10.2.0/db_1/bin/kfed /u01/app/oracle/product/10.2.0/db_1/bin/kfedO
mv: cannot stat `/u01/app/oracle/product/10.2.0/db_1/bin/kfed': No such file or directory
make: [ikfed] Error 1 (ignored)
mv /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/kfed /u01/app/oracle/product/10.2.0/db_1/bin/kfed
chmod 751 /u01/app/oracle/product/10.2.0/db_1/bin/kfed

下面就可以用kfed来检查ASM磁盘裸设备的文件头信息了:

[oracle@node1 data]$ kfed read /dev/raw/raw4 > raw4.txt
[oracle@node1 data]$ kfed read /dev/raw/raw5 > raw5.txt
[oracle@node1 data]$ kfed read /dev/raw/raw6 > raw6.txt

将磁盘组DATAG1的两个磁盘头以及另一个磁盘组DATAG2的第一个文件的头信息输出到文本文件,将三个文件进行对比,找到raw4文件中异常的部分。

由于每个磁盘组中有两个文件,且有两个磁盘组,使得比对的工作非常顺利,定位到raw4中存在两个标志位异常:

[oracle@nccpxdb1 lib]$ kfed read /dev/raw/raw4
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       0 ; 0x004: T=0 NUMB=0x0
kfbh.block.obj:              2147483648 ; 0x008: TYPE=0x8 NUMB=0x0
kfbh.check:                  4024565597 ; 0x00c: 0xefe1ff5d
kfbh.fcn.base:                   952047 ; 0x010: 0x000e86ef
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr:         ORCLDISK ; 0x000: length=8
kfdhdb.driver.reserved[0]:            0 ; 0x008: 0x00000000
kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000
kfdhdb.compat:                168820736 ; 0x020: 0x0a100000
kfdhdb.dsknum:                        0 ; 0x024: 0x0000
kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname:             DATAG1_0000 ; 0x028: length=11
kfdhdb.grpname:                  DATAG1 ; 0x048: length=6
kfdhdb.fgname:              DATAG1_0000 ; 0x068: length=11
kfdhdb.capname:                         ; 0x088: length=0
kfdhdb.crestmp.hi:             32928501 ; 0x0a8: HOUR=0x15 DAYS=0x17 MNTH=0xc YEAR=0x7d9
kfdhdb.crestmp.lo:           2195144704 ; 0x0ac: USEC=0x0 MSEC=0x1d0 SECS=0x2d MINS=0x20
kfdhdb.mntstmp.hi:             32940275 ; 0x0b0: HOUR=0x13 DAYS=0x7 MNTH=0x8 YEAR=0x7da
kfdhdb.mntstmp.lo:           3201116160 ; 0x0b4: USEC=0x0 MSEC=0x34a SECS=0x2c MINS=0x2f
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000
kfdhdb.ausize:                  1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact:                    113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize:                  512000 ; 0x0c4: 0x0007d000
kfdhdb.pmcnt:                         6 ; 0x0c8: 0x00000006
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn:                      2 ; 0x0d4: 0x00000002
kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000
kfdhdb.redomirrors[1]:            65535 ; 0x0da: 0xffff
kfdhdb.redomirrors[2]:            65535 ; 0x0dc: 0xffff
kfdhdb.redomirrors[3]:            65535 ; 0x0de: 0xffff
kfdhdb.dbcompat:              168820736 ; 0x0e0: 0x0a100000
kfdhdb.grpstmp.hi:             32928501 ; 0x0e4: HOUR=0x15 DAYS=0x17 MNTH=0xc YEAR=0x7d9
kfdhdb.grpstmp.lo:           2195053568 ; 0x0e8: USEC=0x0 MSEC=0x177 SECS=0x2d MINS=0x20
kfdhdb.ub4spare[0]:                   0 ; 0x0ec: 0x00000000
kfdhdb.ub4spare[1]:                   0 ; 0x0f0: 0x00000000
kfdhdb.ub4spare[2]:                   0 ; 0x0f4: 0x00000000
kfdhdb.ub4spare[3]:                   0 ; 0x0f8: 0x00000000
kfdhdb.ub4spare[4]:                   0 ; 0x0fc: 0x00000000
kfdhdb.ub4spare[5]:                   0 ; 0x100: 0x00000000
kfdhdb.ub4spare[6]:                   0 ; 0x104: 0x00000000
kfdhdb.ub4spare[7]:                   0 ; 0x108: 0x00000000
kfdhdb.ub4spare[8]:                   0 ; 0x10c: 0x00000000
kfdhdb.ub4spare[9]:                   0 ; 0x110: 0x00000000
kfdhdb.ub4spare[10]:                  0 ; 0x114: 0x00000000
kfdhdb.ub4spare[11]:                  0 ; 0x118: 0x00000000
kfdhdb.ub4spare[12]:                  0 ; 0x11c: 0x00000000
kfdhdb.ub4spare[13]:                  0 ; 0x120: 0x00000000
kfdhdb.ub4spare[14]:                  0 ; 0x124: 0x00000000
kfdhdb.ub4spare[15]:                  0 ; 0x128: 0x00000000
kfdhdb.ub4spare[16]:                  0 ; 0x12c: 0x00000000
kfdhdb.ub4spare[17]:                  0 ; 0x130: 0x00000000
kfdhdb.ub4spare[18]:                  0 ; 0x134: 0x00000000
kfdhdb.ub4spare[19]:                  0 ; 0x138: 0x00000000
kfdhdb.ub4spare[20]:                  0 ; 0x13c: 0x00000000
kfdhdb.ub4spare[21]:                  0 ; 0x140: 0x00000000
kfdhdb.ub4spare[22]:                  0 ; 0x144: 0x00000000
kfdhdb.ub4spare[23]:                  0 ; 0x148: 0x00000000
kfdhdb.ub4spare[24]:                  0 ; 0x14c: 0x00000000
kfdhdb.ub4spare[25]:                  0 ; 0x150: 0x00000000
kfdhdb.ub4spare[26]:                  0 ; 0x154: 0x00000000
kfdhdb.ub4spare[27]:                  0 ; 0x158: 0x00000000
kfdhdb.ub4spare[28]:                  0 ; 0x15c: 0x00000000
kfdhdb.ub4spare[29]:                  0 ; 0x160: 0x00000000
kfdhdb.ub4spare[30]:                  0 ; 0x164: 0x00000000
kfdhdb.ub4spare[31]:                  0 ; 0x168: 0x00000000
kfdhdb.ub4spare[32]:                  0 ; 0x16c: 0x00000000
kfdhdb.ub4spare[33]:                  0 ; 0x170: 0x00000000
kfdhdb.ub4spare[34]:                  0 ; 0x174: 0x00000000
kfdhdb.ub4spare[35]:                  0 ; 0x178: 0x00000000
kfdhdb.ub4spare[36]:                  0 ; 0x17c: 0x00000000
kfdhdb.ub4spare[37]:                  0 ; 0x180: 0x00000000
kfdhdb.ub4spare[38]:                  0 ; 0x184: 0x00000000
kfdhdb.ub4spare[39]:                  0 ; 0x188: 0x00000000
kfdhdb.ub4spare[40]:                  0 ; 0x18c: 0x00000000
kfdhdb.ub4spare[41]:                  0 ; 0x190: 0x00000000
kfdhdb.ub4spare[42]:                  0 ; 0x194: 0x00000000
kfdhdb.ub4spare[43]:             104436 ; 0x198: 0x000197f4
kfdhdb.ub4spare[44]:                  0 ; 0x19c: 0x00000000
kfdhdb.ub4spare[45]:                  0 ; 0x1a0: 0x00000000
kfdhdb.ub4spare[46]:                  0 ; 0x1a4: 0x00000000
kfdhdb.ub4spare[47]:                  0 ; 0x1a8: 0x00000000
kfdhdb.ub4spare[48]:                  0 ; 0x1ac: 0x00000000
kfdhdb.ub4spare[49]:                  0 ; 0x1b0: 0x00000000
kfdhdb.ub4spare[50]:                  0 ; 0x1b4: 0x00000000
kfdhdb.ub4spare[51]:                  0 ; 0x1b8: 0x00000000
kfdhdb.ub4spare[52]:                  0 ; 0x1bc: 0x00000000
kfdhdb.ub4spare[53]:                  0 ; 0x1c0: 0x00000000
kfdhdb.ub4spare[54]:                  0 ; 0x1c4: 0x00000000
kfdhdb.ub4spare[55]:                  0 ; 0x1c8: 0x00000000
kfdhdb.ub4spare[56]:                  0 ; 0x1cc: 0x00000000
kfdhdb.ub4spare[57]:                  0 ; 0x1d0: 0x00000000
kfdhdb.acdb.aba.seq:                  0 ; 0x1d4: 0x00000000
kfdhdb.acdb.aba.blk:                  0 ; 0x1d8: 0x00000000
kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000
kfdhdb.acdb.ub2spare:             43605 ; 0x1de: 0xaa55

raw5磁盘的标识位全为0

[oracle@nccpxdb1 lib]$ kfed read /dev/raw/raw5
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       0 ; 0x004: T=0 NUMB=0x0
kfbh.block.obj:              2147483649 ; 0x008: TYPE=0x8 NUMB=0x1
kfbh.check:                  1802212223 ; 0x00c: 0x6b6b937f
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
kfdhdb.driver.provstr:         ORCLDISK ; 0x000: length=8
kfdhdb.driver.reserved[0]:            0 ; 0x008: 0x00000000
kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000
kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000
kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000
kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000
kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000
kfdhdb.compat:                168820736 ; 0x020: 0x0a100000
kfdhdb.dsknum:                        1 ; 0x024: 0x0001
kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname:             DATAG1_0001 ; 0x028: length=11
kfdhdb.grpname:                  DATAG1 ; 0x048: length=6
kfdhdb.fgname:              DATAG1_0001 ; 0x068: length=11
kfdhdb.capname:                         ; 0x088: length=0
kfdhdb.crestmp.hi:             32928501 ; 0x0a8: HOUR=0x15 DAYS=0x17 MNTH=0xc YEAR=0x7d9
kfdhdb.crestmp.lo:           2195144704 ; 0x0ac: USEC=0x0 MSEC=0x1d0 SECS=0x2d MINS=0x20
kfdhdb.mntstmp.hi:             32940275 ; 0x0b0: HOUR=0x13 DAYS=0x7 MNTH=0x8 YEAR=0x7da
kfdhdb.mntstmp.lo:           3201116160 ; 0x0b4: USEC=0x0 MSEC=0x34a SECS=0x2c MINS=0x2f
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000
kfdhdb.ausize:                  1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact:                    113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize:                  512000 ; 0x0c4: 0x0007d000
kfdhdb.pmcnt:                         6 ; 0x0c8: 0x00000006
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn:                      0 ; 0x0d4: 0x00000000
kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000
kfdhdb.redomirrors[1]:                0 ; 0x0da: 0x0000
kfdhdb.redomirrors[2]:                0 ; 0x0dc: 0x0000
kfdhdb.redomirrors[3]:                0 ; 0x0de: 0x0000
kfdhdb.dbcompat:              168820736 ; 0x0e0: 0x0a100000
kfdhdb.grpstmp.hi:             32928501 ; 0x0e4: HOUR=0x15 DAYS=0x17 MNTH=0xc YEAR=0x7d9
kfdhdb.grpstmp.lo:           2195053568 ; 0x0e8: USEC=0x0 MSEC=0x177 SECS=0x2d MINS=0x20
kfdhdb.ub4spare[0]:                   0 ; 0x0ec: 0x00000000
kfdhdb.ub4spare[1]:                   0 ; 0x0f0: 0x00000000
kfdhdb.ub4spare[2]:                   0 ; 0x0f4: 0x00000000
kfdhdb.ub4spare[3]:                   0 ; 0x0f8: 0x00000000
kfdhdb.ub4spare[4]:                   0 ; 0x0fc: 0x00000000
kfdhdb.ub4spare[5]:                   0 ; 0x100: 0x00000000
kfdhdb.ub4spare[6]:                   0 ; 0x104: 0x00000000
kfdhdb.ub4spare[7]:                   0 ; 0x108: 0x00000000
kfdhdb.ub4spare[8]:                   0 ; 0x10c: 0x00000000
kfdhdb.ub4spare[9]:                   0 ; 0x110: 0x00000000
kfdhdb.ub4spare[10]:                  0 ; 0x114: 0x00000000
kfdhdb.ub4spare[11]:                  0 ; 0x118: 0x00000000
kfdhdb.ub4spare[12]:                  0 ; 0x11c: 0x00000000
kfdhdb.ub4spare[13]:                  0 ; 0x120: 0x00000000
kfdhdb.ub4spare[14]:                  0 ; 0x124: 0x00000000
kfdhdb.ub4spare[15]:                  0 ; 0x128: 0x00000000
kfdhdb.ub4spare[16]:                  0 ; 0x12c: 0x00000000
kfdhdb.ub4spare[17]:                  0 ; 0x130: 0x00000000
kfdhdb.ub4spare[18]:                  0 ; 0x134: 0x00000000
kfdhdb.ub4spare[19]:                  0 ; 0x138: 0x00000000
kfdhdb.ub4spare[20]:                  0 ; 0x13c: 0x00000000
kfdhdb.ub4spare[21]:                  0 ; 0x140: 0x00000000
kfdhdb.ub4spare[22]:                  0 ; 0x144: 0x00000000
kfdhdb.ub4spare[23]:                  0 ; 0x148: 0x00000000
kfdhdb.ub4spare[24]:                  0 ; 0x14c: 0x00000000
kfdhdb.ub4spare[25]:                  0 ; 0x150: 0x00000000
kfdhdb.ub4spare[26]:                  0 ; 0x154: 0x00000000
kfdhdb.ub4spare[27]:                  0 ; 0x158: 0x00000000
kfdhdb.ub4spare[28]:                  0 ; 0x15c: 0x00000000
kfdhdb.ub4spare[29]:                  0 ; 0x160: 0x00000000
kfdhdb.ub4spare[30]:                  0 ; 0x164: 0x00000000
kfdhdb.ub4spare[31]:                  0 ; 0x168: 0x00000000
kfdhdb.ub4spare[32]:                  0 ; 0x16c: 0x00000000
kfdhdb.ub4spare[33]:                  0 ; 0x170: 0x00000000
kfdhdb.ub4spare[34]:                  0 ; 0x174: 0x00000000
kfdhdb.ub4spare[35]:                  0 ; 0x178: 0x00000000
kfdhdb.ub4spare[36]:                  0 ; 0x17c: 0x00000000
kfdhdb.ub4spare[37]:                  0 ; 0x180: 0x00000000
kfdhdb.ub4spare[38]:                  0 ; 0x184: 0x00000000
kfdhdb.ub4spare[39]:                  0 ; 0x188: 0x00000000
kfdhdb.ub4spare[40]:                  0 ; 0x18c: 0x00000000
kfdhdb.ub4spare[41]:                  0 ; 0x190: 0x00000000
kfdhdb.ub4spare[42]:                  0 ; 0x194: 0x00000000
kfdhdb.ub4spare[43]:                  0 ; 0x198: 0x00000000
kfdhdb.ub4spare[44]:                  0 ; 0x19c: 0x00000000
kfdhdb.ub4spare[45]:                  0 ; 0x1a0: 0x00000000
kfdhdb.ub4spare[46]:                  0 ; 0x1a4: 0x00000000
kfdhdb.ub4spare[47]:                  0 ; 0x1a8: 0x00000000
kfdhdb.ub4spare[48]:                  0 ; 0x1ac: 0x00000000
kfdhdb.ub4spare[49]:                  0 ; 0x1b0: 0x00000000
kfdhdb.ub4spare[50]:                  0 ; 0x1b4: 0x00000000
kfdhdb.ub4spare[51]:                  0 ; 0x1b8: 0x00000000
kfdhdb.ub4spare[52]:                  0 ; 0x1bc: 0x00000000
kfdhdb.ub4spare[53]:                  0 ; 0x1c0: 0x00000000
kfdhdb.ub4spare[54]:                  0 ; 0x1c4: 0x00000000
kfdhdb.ub4spare[55]:                  0 ; 0x1c8: 0x00000000
kfdhdb.ub4spare[56]:                  0 ; 0x1cc: 0x00000000
kfdhdb.ub4spare[57]:                  0 ; 0x1d0: 0x00000000
kfdhdb.acdb.aba.seq:                  0 ; 0x1d4: 0x00000000
kfdhdb.acdb.aba.blk:                  0 ; 0x1d8: 0x00000000
kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000
kfdhdb.acdb.ub2spare:                 0 ; 0x1de: 0x0000

而磁盘组的DATAG2的两个磁盘raw6raw7的标识位也都是全0

确定了问题后,手工修改这个文本文件,将kfdhdb.ub4spare[43]kfdhdb.acdb.ub2spare均改为0

kfdhdb.ub4spare[43]:                  0 ; 0x198: 0x00000000
kfdhdb.ub4spare[44]:                  0 ; 0x19c: 0x00000000
.
.
.
kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000
kfdhdb.acdb.ub2spare:                 0 ; 0x1de: 0x0000

然后利用kfedmerge将其写回磁盘头:

[oracle@node1 data]$ kfed merge /dev/raw/raw4 text=raw4_new.txt
[oracle@node1 data]$ export ORACLE_SID=+ASM1
[oracle@node1 data]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Mon Jun 13 18:45:54 2011

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Oracle Label Security, OLAP,
Data Mining and Real Application Testing options

SQL> set pages 100 lines 120
SQL> select group_number, name, state, total_mb, free_mb from v$asm_diskgroup;

GROUP_NUMBER NAME          STATE                    TOTAL_MB    FREE_MB
------------ ------------------------------------ ---------- ----------
           1 DATAG1        DISMOUNT                        0          0
           2 DATAG2        MOUNTED                   1024000     347457

SQL> select group_number, disk_number, mount_status, header_status, name, path from v$asm_disk;

GROUP_NUMBER DISK_NUMBER MOUNT_STATUS HEADER_STATUS  NAME        PATH
------------ ----------- ------------ -------------- ----------- --------------
           0           0 CLOSED       FOREIGN                    /dev/raw/raw1
           0           1 CLOSED       FOREIGN                    /dev/raw/raw2
           0           2 CLOSED       FOREIGN                    /dev/raw/raw8
           0           3 CLOSED       FOREIGN                    /dev/raw/raw10
           0           4 CLOSED       FOREIGN                    /dev/raw/raw9
           0           8 CLOSED       MEMBER                     /dev/raw/raw4
           0           5 CLOSED       MEMBER                     /dev/raw/raw5
           2           1 CACHED       MEMBER         DATAG2_0001 /dev/raw/raw7
           2           0 CACHED       MEMBER         DATAG2_0000 /dev/raw/raw6

SQL> alter diskgroup datag1 mount;

Diskgroup altered.

SQL> shutdown immediate
ASM diskgroups dismounted
ASM instance shutdown
SQL> startup
ASM instance started

Total System Global Area  130023424 bytes
Fixed Size                  2082208 bytes
Variable Size             102775392 bytes
ASM Cache                  25165824 bytes
ASM diskgroups mounted
SQL> exit

利用MERGE修改磁盘头后,磁盘状态正常,磁盘组顺利挂载。此时检查节点1上的磁盘头信息,状态也恢复了正常。

在运行MERGE命令的时候,整个磁盘组并没有卸载,数据库也在正常运行,也就是说,在整个操作过程中,并没有1秒钟的停机时间,所有的修改都是ONLINE进行的。

只要磁盘组恢复了正常,剩下的操作就很简单了,手工将第二个实例添加到数据库中就可以了。

 

来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/4227/viewspace-703174/,如需转载,请注明出处,否则将追究法律责任。

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