在oracle中提供了一个程序kfed用来查看ASM磁盘头部信息。此程序位于$ORACLE_HOME/bin目录下,如果没有可以按照以下方法生成kfed程序:

进入$ORACLE_HOME/rdbms/lib下,执行make -f ins_rdbms.mk ikfed命令,执行完成后会在$ORACLE_HOME/bin目录中将会产生kfed程序。

kfed的语法是:kfed read *devicename* text=*filename*

read指读取。

*devicename*指要读取的磁盘名称。

test指输出的格式为文本格式。

*filename*指输出的文件命。

text选项是可选的,使用了此选项则输出结果输出到指定文件,如果不加默认的输出是指屏幕输出。

示例如下:

查看下asm磁盘组中的磁盘:

如何查看以及清除Oracle ASM磁盘头部信息_第1张图片

(图1)

查看已有的磁盘组、块大小以及类型:

如何查看以及清除Oracle ASM磁盘头部信息_第2张图片

(图2)

读取磁盘vol01的头部信息:

[oracle@oradb bin]$ kfed read /dev/oracleasm/disks/VOL01
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:                  3091711072 ; 0x00c: 0xb847c460
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:    ORCLDISKVOL01 ; 0x000: length=13
kfdhdb.driver.reserved[0]:    810307414 ; 0x008: 0x304c4f56
kfdhdb.driver.reserved[1]:           49 ; 0x00c: 0x00000031
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                     //这里是磁盘号,和图1中的输出一致。
kfdhdb.grptyp:                        3 ; 0x026: KFDGTP_HIGH             //这里是磁盘类型,和图2输出一致。
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname:                   VOL01 ; 0x028: length=5               //磁盘名称,如图1所示。
kfdhdb.grpname:                    DATA ; 0x048: length=4               //磁盘所属的磁盘组,如图2所示。
kfdhdb.fgname:                    VOL01 ; 0x068: length=5
kfdhdb.capname:                         ; 0x088: length=0
kfdhdb.crestmp.hi:             32942006 ; 0x0a8: HOUR=0x16 DAYS=0x1d MNTH=0x9 YEAR=0x7da
kfdhdb.crestmp.lo:            449689600 ; 0x0ac: USEC=0x0 MSEC=0x36e SECS=0x2c MINS=0x6
kfdhdb.mntstmp.hi:             32942646 ; 0x0b0: HOUR=0x16 DAYS=0x11 MNTH=0xa YEAR=0x7da
kfdhdb.mntstmp.lo:           1573951488 ; 0x0b4: USEC=0x0 MSEC=0x26 SECS=0x1d MINS=0x17
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000                    //这里指每个block的大小,和图2的输出一致。
kfdhdb.ausize:                  1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact:                    113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize:                   10236 ; 0x0c4: 0x000027fc             //这里是磁盘的大小,和图1的输出一致。
kfdhdb.pmcnt:                         2 ; 0x0c8: 0x00000002
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn:                      2 ; 0x0d4: 0x00000002
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:             32942006 ; 0x0e4: HOUR=0x16 DAYS=0x1d MNTH=0x9 YEAR=0x7da
kfdhdb.grpstmp.lo:            448217088 ; 0x0e8: USEC=0x0 MSEC=0x1d0 SECS=0x2b MINS=0x6
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
[oracle@oradb bin]$

清理ASM磁盘头部信息:

p_w_picpath

虽然大部分内容都可以从ASM实例的数据字典中获得,但是在我们碰到ASM磁盘故障的时候,kfed提供的信息往往更容易让我们判断问题点。

如果一个ASM Disk由于故障,导致删也删不掉,加也加不进去,一般情况是磁盘的header status状态不正确,此时就需要clear这个磁盘,然后再将它重新加入磁盘组中。