Exadata上验证ASM磁盘头备份的位置

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标题:Exadata上验证ASM磁盘头备份的位置

作者:Lunar©版权所有[文章允许转载,但必须以链接方式注明源地址,否则追究法律责任.]

我们都知道,从Oracle 10.2.0.5开始,ASM磁盘会自动备份磁盘头块,备份块的位置在第2个AU的倒数第2个块上。
通常,缺省情况下,AU SIZE是1M,每个AU可以有256个block(每个block 4k),256*4k()=1M
因此,第2个AU同样存放了256个block(0~255),其备份块的位置为 au=1 blkn=254(au和block都是从0开始计数的)
具体的恢复案例,可以参考:
ASM磁盘头被fdisk损坏的修复过程
那么在exadata上,缺省的AU是4M,也就是每个AU可以存储 1024个block,即 block 0 ~ block 1023
那么第二个AU的倒数第二个block就是 au=1 blkn=1022 ( au和block都是从0开始计数的 )

我们来检测一下是不是这样:

col Attribute for a30
col Value for a30
SELECT g.name "Group name", a.name "Attribute", a.value "Value"
FROM v$asm_diskgroup g, v$asm_attribute a
WHERE g.group_number=a.group_number and a.name not like 'template%';
Group name                     Attribute                      Value
------------------------------ ------------------------------ ------------------------------
DATA_DM01                      au_size                        4194304   -------//  AU SIZE
DATA_DM01                      disk_repair_time               3.6h
DATA_DM01                      idp.boundary                   auto
DATA_DM01                      idp.type                       dynamic
DATA_DM01                      sector_size                    512       -------//  SECTOR SIZE
DATA_DM01                      access_control.umask           066
DATA_DM01                      compatible.rdbms               11.2.0.2.0
DATA_DM01                      compatible.advm                11.2.0.0.0
DATA_DM01                      cell.smart_scan_capable        TRUE
DATA_DM01                      access_control.enabled         FALSE
DATA_DM01                      compatible.asm                 11.2.0.2.0


[grid@dm01db01 ~]$ kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m aun=0 blkn=0|grep ausize
kfdhdb.ausize:                  4194304 ; 0x0bc: 0x00400000					-------//  AU SIZE, 4M
[grid@dm01db01 ~]$ kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m aun=0 blkn=0|grep blksize
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000					    -------//  ASM BLOCK SIZ, 4k
[grid@dm01db01 ~]$ kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m aun=0 blkn=0|grep secsize
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200             -------//  SECTOR SIZE, 512 byte
[grid@dm01db01 ~]$ 


注意:
这里kfed命令中,需要指定ausz=4m,否则kfed缺省按照1M来计算,那么结果就是错误的了:

[grid@dm01db01 ~]$ kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 aun=1 blkn=1022
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                           13 ; 0x002: KFBTYP_PST_NONE
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:              2147483902 ; 0x004: T=1 NUMB=0xfe
kfbh.block.obj:              2147483648 ; 0x008: TYPE=0x8 NUMB=0x0
kfbh.check:                    17662719 ; 0x00c: 0x010d82ff
kfbh.fcn.base:                        0 ; 0x010: 0x00000000
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
ERROR!!!, failed to get the oracore error message
[grid@dm01db01 ~]$ 

在kfed中指定ausz=4m,检测结果:

[grid@dm01db01 ~]$ kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m aun=0 blkn=0     [grid@dm01db01 ~]$ kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m aun=1 blkn=1022
kfbh.endian:                          1 ; 0x000: 0x01                                          kfbh.endian:                          1 ; 0x000: 0x01                                        
kfbh.hard:                          130 ; 0x001: 0x82                                          kfbh.hard:                          130 ; 0x001: 0x82                                        
kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD                               kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD                             
kfbh.datfmt:                          1 ; 0x003: 0x01                                          kfbh.datfmt:                          1 ; 0x003: 0x01                                        
kfbh.block.blk:                       0 ; 0x004: T=0 NUMB=0x0                                  kfbh.block.blk:                    1022 ; 0x004: T=0 NUMB=0x3fe                    ---这里不同          
kfbh.block.obj:              2147483648 ; 0x008: TYPE=0x8 NUMB=0x0                             kfbh.block.obj:              2147483648 ; 0x008: TYPE=0x8 NUMB=0x0                          
kfbh.check:                   650486353 ; 0x00c: 0x26c5a251                                    kfbh.check:                   650486191 ; 0x00c: 0x26c5a1af                        ---这里不同                              
kfbh.fcn.base:                  4985684 ; 0x010: 0x004c1354                                    kfbh.fcn.base:                  4985684 ; 0x010: 0x004c1354                                  
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000                                    kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000                                  
kfbh.spare1:                          0 ; 0x018: 0x00000000                                    kfbh.spare1:                          0 ; 0x018: 0x00000000                                  
kfbh.spare2:                          0 ; 0x01c: 0x00000000                                    kfbh.spare2:                          0 ; 0x01c: 0x00000000                                  
kfdhdb.driver.provstr:         ORCLDISK ; 0x000: length=8                                      kfdhdb.driver.provstr:         ORCLDISK ; 0x000: length=8                                    
kfdhdb.driver.reserved[0]:            0 ; 0x008: 0x00000000                                    kfdhdb.driver.reserved[0]:            0 ; 0x008: 0x00000000                                  
kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000                                    kfdhdb.driver.reserved[1]:            0 ; 0x00c: 0x00000000                                  
kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000                                    kfdhdb.driver.reserved[2]:            0 ; 0x010: 0x00000000                                  
kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000                                    kfdhdb.driver.reserved[3]:            0 ; 0x014: 0x00000000                                  
kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000                                    kfdhdb.driver.reserved[4]:            0 ; 0x018: 0x00000000                                  
kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000                                    kfdhdb.driver.reserved[5]:            0 ; 0x01c: 0x00000000                                  
kfdhdb.compat:                186647040 ; 0x020: 0x0b200200                                    kfdhdb.compat:                186647040 ; 0x020: 0x0b200200                                  
kfdhdb.dsknum:                        0 ; 0x024: 0x0000                                        kfdhdb.dsknum:                        0 ; 0x024: 0x0000                                      
kfdhdb.grptyp:                        2 ; 0x026: KFDGTP_NORMAL                                 kfdhdb.grptyp:                        2 ; 0x026: KFDGTP_NORMAL                               
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER                                 kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER                               
kfdhdb.dskname:DATA_DM01_CD_00_DM01CEL01 ; 0x028: length=25                                    kfdhdb.dskname:DATA_DM01_CD_00_DM01CEL01 ; 0x028: length=25                                  
kfdhdb.grpname:               DATA_DM01 ; 0x048: length=9                                      kfdhdb.grpname:               DATA_DM01 ; 0x048: length=9                                    
kfdhdb.fgname:                DM01CEL01 ; 0x068: length=9                                      kfdhdb.fgname:                DM01CEL01 ; 0x068: length=9                                    
kfdhdb.capname:                         ; 0x088: length=0                                      kfdhdb.capname:                         ; 0x088: length=0                                    
kfdhdb.crestmp.hi:             32959025 ; 0x0a8: HOUR=0x11 DAYS=0x11 MNTH=0xa YEAR=0x7db       kfdhdb.crestmp.hi:             32959025 ; 0x0a8: HOUR=0x11 DAYS=0x11 MNTH=0xa YEAR=0x7db     
kfdhdb.crestmp.lo:           1716041728 ; 0x0ac: USEC=0x0 MSEC=0x22e SECS=0x24 MINS=0x19       kfdhdb.crestmp.lo:           1716041728 ; 0x0ac: USEC=0x0 MSEC=0x22e SECS=0x24 MINS=0x19     
kfdhdb.mntstmp.hi:             32989736 ; 0x0b0: HOUR=0x8 DAYS=0x11 MNTH=0x8 YEAR=0x7dd        kfdhdb.mntstmp.hi:             32989736 ; 0x0b0: HOUR=0x8 DAYS=0x11 MNTH=0x8 YEAR=0x7dd      
kfdhdb.mntstmp.lo:           1753117696 ; 0x0b4: USEC=0x0 MSEC=0x39d SECS=0x7 MINS=0x1a        kfdhdb.mntstmp.lo:           1753117696 ; 0x0b4: USEC=0x0 MSEC=0x39d SECS=0x7 MINS=0x1a      
kfdhdb.secsize:                     512 ; 0x0b8: 0x0200                                        kfdhdb.secsize:                     512 ; 0x0b8: 0x0200                                      
kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000                                        kfdhdb.blksize:                    4096 ; 0x0ba: 0x1000                                      
kfdhdb.ausize:                  4194304 ; 0x0bc: 0x00400000                                    kfdhdb.ausize:                  4194304 ; 0x0bc: 0x00400000                                  
kfdhdb.mfact:                    454272 ; 0x0c0: 0x0006ee80                                    kfdhdb.mfact:                    454272 ; 0x0c0: 0x0006ee80                                  
kfdhdb.dsksize:                  108288 ; 0x0c4: 0x0001a700                                    kfdhdb.dsksize:                  108288 ; 0x0c4: 0x0001a700                                  
kfdhdb.pmcnt:                         2 ; 0x0c8: 0x00000002                                    kfdhdb.pmcnt:                         2 ; 0x0c8: 0x00000002                                  
kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001                                    kfdhdb.fstlocn:                       1 ; 0x0cc: 0x00000001                                  
kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002                                    kfdhdb.altlocn:                       2 ; 0x0d0: 0x00000002                                  
kfdhdb.f1b1locn:                      2 ; 0x0d4: 0x00000002                                    kfdhdb.f1b1locn:                      2 ; 0x0d4: 0x00000002                                  
kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000                                        kfdhdb.redomirrors[0]:                0 ; 0x0d8: 0x0000                                      
kfdhdb.redomirrors[1]:               17 ; 0x0da: 0x0011                                        kfdhdb.redomirrors[1]:               17 ; 0x0da: 0x0011                                      
kfdhdb.redomirrors[2]:               30 ; 0x0dc: 0x001e                                        kfdhdb.redomirrors[2]:               30 ; 0x0dc: 0x001e                                      
kfdhdb.redomirrors[3]:            65535 ; 0x0de: 0xffff                                        kfdhdb.redomirrors[3]:            65535 ; 0x0de: 0xffff                                      
kfdhdb.dbcompat:              186647040 ; 0x0e0: 0x0b200200                                    kfdhdb.dbcompat:              186647040 ; 0x0e0: 0x0b200200                                  
kfdhdb.grpstmp.hi:             32959025 ; 0x0e4: HOUR=0x11 DAYS=0x11 MNTH=0xa YEAR=0x7db       kfdhdb.grpstmp.hi:             32959025 ; 0x0e4: HOUR=0x11 DAYS=0x11 MNTH=0xa YEAR=0x7db     
kfdhdb.grpstmp.lo:           1713335296 ; 0x0e8: USEC=0x0 MSEC=0x3db SECS=0x21 MINS=0x19       kfdhdb.grpstmp.lo:           1713335296 ; 0x0e8: USEC=0x0 MSEC=0x3db SECS=0x21 MINS=0x19     
kfdhdb.vfstart:                       0 ; 0x0ec: 0x00000000                                    kfdhdb.vfstart:                       0 ; 0x0ec: 0x00000000                                  
kfdhdb.vfend:                         0 ; 0x0f0: 0x00000000                                    kfdhdb.vfend:                         0 ; 0x0f0: 0x00000000                                  
kfdhdb.spfile:                        0 ; 0x0f4: 0x00000000                                    kfdhdb.spfile:                        0 ; 0x0f4: 0x00000000                                  
kfdhdb.spfflg:                        0 ; 0x0f8: 0x00000000                                    kfdhdb.spfflg:                        0 ; 0x0f8: 0x00000000                                  
kfdhdb.ub4spare[0]:                   0 ; 0x0fc: 0x00000000                                    kfdhdb.ub4spare[0]:                   0 ; 0x0fc: 0x00000000                                  
kfdhdb.ub4spare[1]:                   0 ; 0x100: 0x00000000                                    kfdhdb.ub4spare[1]:                   0 ; 0x100: 0x00000000                                  
kfdhdb.ub4spare[2]:                   0 ; 0x104: 0x00000000                                    kfdhdb.ub4spare[2]:                   0 ; 0x104: 0x00000000                                  
kfdhdb.ub4spare[3]:                   0 ; 0x108: 0x00000000                                    kfdhdb.ub4spare[3]:                   0 ; 0x108: 0x00000000                                  
kfdhdb.ub4spare[4]:                   0 ; 0x10c: 0x00000000                                    kfdhdb.ub4spare[4]:                   0 ; 0x10c: 0x00000000                                  
kfdhdb.ub4spare[5]:                   0 ; 0x110: 0x00000000                                    kfdhdb.ub4spare[5]:                   0 ; 0x110: 0x00000000                                  
kfdhdb.ub4spare[6]:                   0 ; 0x114: 0x00000000                                    kfdhdb.ub4spare[6]:                   0 ; 0x114: 0x00000000                                  
kfdhdb.ub4spare[7]:                   0 ; 0x118: 0x00000000                                    kfdhdb.ub4spare[7]:                   0 ; 0x118: 0x00000000                                  
kfdhdb.ub4spare[8]:                   0 ; 0x11c: 0x00000000                                    kfdhdb.ub4spare[8]:                   0 ; 0x11c: 0x00000000                                  
kfdhdb.ub4spare[9]:                   0 ; 0x120: 0x00000000                                    kfdhdb.ub4spare[9]:                   0 ; 0x120: 0x00000000                                  
kfdhdb.ub4spare[10]:                  0 ; 0x124: 0x00000000                                    kfdhdb.ub4spare[10]:                  0 ; 0x124: 0x00000000                                  
kfdhdb.ub4spare[11]:                  0 ; 0x128: 0x00000000                                    kfdhdb.ub4spare[11]:                  0 ; 0x128: 0x00000000                                  
kfdhdb.ub4spare[12]:                  0 ; 0x12c: 0x00000000                                    kfdhdb.ub4spare[12]:                  0 ; 0x12c: 0x00000000                                  
kfdhdb.ub4spare[13]:                  0 ; 0x130: 0x00000000                                    kfdhdb.ub4spare[13]:                  0 ; 0x130: 0x00000000                                  
kfdhdb.ub4spare[14]:                  0 ; 0x134: 0x00000000                                    kfdhdb.ub4spare[14]:                  0 ; 0x134: 0x00000000                                  
kfdhdb.ub4spare[15]:                  0 ; 0x138: 0x00000000                                    kfdhdb.ub4spare[15]:                  0 ; 0x138: 0x00000000                                  
kfdhdb.ub4spare[16]:                  0 ; 0x13c: 0x00000000                                    kfdhdb.ub4spare[16]:                  0 ; 0x13c: 0x00000000                                  
kfdhdb.ub4spare[17]:                  0 ; 0x140: 0x00000000                                    kfdhdb.ub4spare[17]:                  0 ; 0x140: 0x00000000                                  
kfdhdb.ub4spare[18]:                  0 ; 0x144: 0x00000000                                    kfdhdb.ub4spare[18]:                  0 ; 0x144: 0x00000000                                  
kfdhdb.ub4spare[19]:                  0 ; 0x148: 0x00000000                                    kfdhdb.ub4spare[19]:                  0 ; 0x148: 0x00000000                                  
kfdhdb.ub4spare[20]:                  0 ; 0x14c: 0x00000000                                    kfdhdb.ub4spare[20]:                  0 ; 0x14c: 0x00000000                                  
kfdhdb.ub4spare[21]:                  0 ; 0x150: 0x00000000                                    kfdhdb.ub4spare[21]:                  0 ; 0x150: 0x00000000                                  
kfdhdb.ub4spare[22]:                  0 ; 0x154: 0x00000000                                    kfdhdb.ub4spare[22]:                  0 ; 0x154: 0x00000000                                  
kfdhdb.ub4spare[23]:                  0 ; 0x158: 0x00000000                                    kfdhdb.ub4spare[23]:                  0 ; 0x158: 0x00000000                                  
kfdhdb.ub4spare[24]:                  0 ; 0x15c: 0x00000000                                    kfdhdb.ub4spare[24]:                  0 ; 0x15c: 0x00000000                                  
kfdhdb.ub4spare[25]:                  0 ; 0x160: 0x00000000                                    kfdhdb.ub4spare[25]:                  0 ; 0x160: 0x00000000                                  
kfdhdb.ub4spare[26]:                  0 ; 0x164: 0x00000000                                    kfdhdb.ub4spare[26]:                  0 ; 0x164: 0x00000000                                  
kfdhdb.ub4spare[27]:                  0 ; 0x168: 0x00000000                                    kfdhdb.ub4spare[27]:                  0 ; 0x168: 0x00000000                                  
kfdhdb.ub4spare[28]:                  0 ; 0x16c: 0x00000000                                    kfdhdb.ub4spare[28]:                  0 ; 0x16c: 0x00000000                                  
kfdhdb.ub4spare[29]:                  0 ; 0x170: 0x00000000                                    kfdhdb.ub4spare[29]:                  0 ; 0x170: 0x00000000                                  
kfdhdb.ub4spare[30]:                  0 ; 0x174: 0x00000000                                    kfdhdb.ub4spare[30]:                  0 ; 0x174: 0x00000000                                  
kfdhdb.ub4spare[31]:                  0 ; 0x178: 0x00000000                                    kfdhdb.ub4spare[31]:                  0 ; 0x178: 0x00000000                                  
kfdhdb.ub4spare[32]:                  0 ; 0x17c: 0x00000000                                    kfdhdb.ub4spare[32]:                  0 ; 0x17c: 0x00000000                                  
kfdhdb.ub4spare[33]:                  0 ; 0x180: 0x00000000                                    kfdhdb.ub4spare[33]:                  0 ; 0x180: 0x00000000                                  
kfdhdb.ub4spare[34]:                  0 ; 0x184: 0x00000000                                    kfdhdb.ub4spare[34]:                  0 ; 0x184: 0x00000000                                  
kfdhdb.ub4spare[35]:                  0 ; 0x188: 0x00000000                                    kfdhdb.ub4spare[35]:                  0 ; 0x188: 0x00000000                                  
kfdhdb.ub4spare[36]:                  0 ; 0x18c: 0x00000000                                    kfdhdb.ub4spare[36]:                  0 ; 0x18c: 0x00000000                                  
kfdhdb.ub4spare[37]:                  0 ; 0x190: 0x00000000                                    kfdhdb.ub4spare[37]:                  0 ; 0x190: 0x00000000                                  
kfdhdb.ub4spare[38]:                  0 ; 0x194: 0x00000000                                    kfdhdb.ub4spare[38]:                  0 ; 0x194: 0x00000000                                  
kfdhdb.ub4spare[39]:                  0 ; 0x198: 0x00000000                                    kfdhdb.ub4spare[39]:                  0 ; 0x198: 0x00000000                                  
kfdhdb.ub4spare[40]:                  0 ; 0x19c: 0x00000000                                    kfdhdb.ub4spare[40]:                  0 ; 0x19c: 0x00000000                                  
kfdhdb.ub4spare[41]:                  0 ; 0x1a0: 0x00000000                                    kfdhdb.ub4spare[41]:                  0 ; 0x1a0: 0x00000000                                  
kfdhdb.ub4spare[42]:                  0 ; 0x1a4: 0x00000000                                    kfdhdb.ub4spare[42]:                  0 ; 0x1a4: 0x00000000                                  
kfdhdb.ub4spare[43]:                  0 ; 0x1a8: 0x00000000                                    kfdhdb.ub4spare[43]:                  0 ; 0x1a8: 0x00000000                                  
kfdhdb.ub4spare[44]:                  0 ; 0x1ac: 0x00000000                                    kfdhdb.ub4spare[44]:                  0 ; 0x1ac: 0x00000000                                  
kfdhdb.ub4spare[45]:                  0 ; 0x1b0: 0x00000000                                    kfdhdb.ub4spare[45]:                  0 ; 0x1b0: 0x00000000                                  
kfdhdb.ub4spare[46]:                  0 ; 0x1b4: 0x00000000                                    kfdhdb.ub4spare[46]:                  0 ; 0x1b4: 0x00000000                                  
kfdhdb.ub4spare[47]:                  0 ; 0x1b8: 0x00000000                                    kfdhdb.ub4spare[47]:                  0 ; 0x1b8: 0x00000000                                  
kfdhdb.ub4spare[48]:                  0 ; 0x1bc: 0x00000000                                    kfdhdb.ub4spare[48]:                  0 ; 0x1bc: 0x00000000                                  
kfdhdb.ub4spare[49]:                  0 ; 0x1c0: 0x00000000                                    kfdhdb.ub4spare[49]:                  0 ; 0x1c0: 0x00000000                                  
kfdhdb.ub4spare[50]:                  0 ; 0x1c4: 0x00000000                                    kfdhdb.ub4spare[50]:                  0 ; 0x1c4: 0x00000000                                  
kfdhdb.ub4spare[51]:                  0 ; 0x1c8: 0x00000000                                    kfdhdb.ub4spare[51]:                  0 ; 0x1c8: 0x00000000                                  
kfdhdb.ub4spare[52]:                  0 ; 0x1cc: 0x00000000                                    kfdhdb.ub4spare[52]:                  0 ; 0x1cc: 0x00000000                                  
kfdhdb.ub4spare[53]:                  0 ; 0x1d0: 0x00000000                                    kfdhdb.ub4spare[53]:                  0 ; 0x1d0: 0x00000000                                  
kfdhdb.acdb.aba.seq:                  0 ; 0x1d4: 0x00000000                                    kfdhdb.acdb.aba.seq:                  0 ; 0x1d4: 0x00000000                                  
kfdhdb.acdb.aba.blk:                  0 ; 0x1d8: 0x00000000                                    kfdhdb.acdb.aba.blk:                  0 ; 0x1d8: 0x00000000                                  
kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000                                        kfdhdb.acdb.ents:                     0 ; 0x1dc: 0x0000                                      
kfdhdb.acdb.ub2spare:                 0 ; 0x1de: 0x0000                                        kfdhdb.acdb.ub2spare:                 0 ; 0x1de: 0x0000                                      
[grid@dm01db01 ~]$                                                                             [grid@dm01db01 ~]$                                                                           


经过检查,我们发现,这个规律在exadata上依然有效,ASM除了缺省4M的AU,其余没什么变化,O(∩_∩)O哈哈~

顺便介绍一个小方法,快速计算备份块的位置:(该方法根据ASM Support Guy修改而来)

ausize=`kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m | grep ausize | tr -s ' ' | cut -d' ' -f2`
blksize=`kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m | grep blksize | tr -s ' ' | cut -d' ' -f2`
let n=$ausize/$blksize-2
echo $n

[grid@dm01db01 ~]$ ausize=`kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m | grep ausize | tr -s ' ' | cut -d' ' -f2`
[grid@dm01db01 ~]$ 
[grid@dm01db01 ~]$ blksize=`kfed read o/192.168.10.3/DATA_DM01_CD_00_dm01cel01 ausz=4m | grep blksize | tr -s ' ' | cut -d' ' -f2`
[grid@dm01db01 ~]$ 
[grid@dm01db01 ~]$ let n=$ausize/$blksize-2
[grid@dm01db01 ~]$ echo $n
1022
[grid@dm01db01 ~]$ 
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Exadata上验证ASM磁盘头备份的位置》有 1 条评论

  1. Pingback 引用通告: 在Exadata上,为什么 DUL 和 ODU不能读取数据库的数据,但是Kfed却可以? – 世间所有相遇都是久别重逢 - Lunar的oracle实验室

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