KFED修復ASM磁盤頭

發(fā)布時間：2020-08-04 17:51:50 來源：ITPUB博客閱讀：193 作者：jeekey00 欄目：關系型數(shù)據(jù)庫

之前RAC環(huán)境出現(xiàn)了故障，節(jié)點2操作系統(tǒng)崩潰，重裝系統(tǒng)后，CRS添加成功，但是CRS啟動有問題，排查發(fā)現(xiàn)節(jié)點2 ASM的+DATA diskgroup無法mount，報如下錯誤：
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DATA"
在ASM實例上檢查磁盤組和磁盤的狀態(tài)，發(fā)現(xiàn)+DATA diskgroup的6塊盤有3塊是MEMBER，有3塊是PROVISIONED。

NOMOUNT狀態(tài)，導致添加操作失敗，而嘗試在目前正常工作的節(jié)點添加磁盤，結果同樣報錯：

SQL> alter diskgroup DATA add disk '/dev/oracleasm/disks/OADB_DATA_300G_6';
alter diskgroup DATA add disk '/dev/oracleasm/disks/OADB_DATA_300G_6'
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15029: disk '/dev/oracleasm/disks/OADB_DATA_300G_6' is already mounted by this instance

解決辦法要么是重建ASM磁盤，要么直接修改ASM磁盤頭信息。重建的話耗時太長，因為有本地備庫，隨時可切換，最終確定通過KFED工具直接修改ASM磁盤頭信息。
步驟如下：
1、首先編譯kfed
#cd $ORACLE_HOME/rdbms/lib
#make -f ins_rdbms.mk ikfed
2、用kfed讀取故障ASM磁盤頭信息

$kfed read /dev/oracleasm/disks/OADB_DATA_DISK_1
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]: 104436 ; 0x198: 0x000197f4
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: 43605 ; 0x1de: 0xaa55

通過kfed分別讀取故障ASM磁盤頭信息和正常ASM磁盤頭信息，發(fā)現(xiàn)故障磁盤頭標紅地方與正常ASM磁盤頭不一致，故障ASM磁盤信息如下：
kfdhdb.ub4spare[39]: 104436 ; 0x198: 0x000197f4
kfdhdb.acdb.ub2spare: 43605 ; 0x1de: 0xaa55
正常ASM磁盤頭信息該項為0
3、修復步驟：
a、通過kfed read /dev/oracleasm/disks/OADB_DATA_DISK_1 > /tmp/disk1.txt 導出磁盤頭信息
b、修改kfdhdb.ub4spare[39]: 104436 ; 0x198: 0x000197f4 為 kfdhdb.ub4spare[39]: 0 ; 0x198: 0x00000000 ；修改kfdhdb.acdb.ub2spare: 43605 ; 0x1de: 0xaa55為kfdhdb.acdb.ub2spare: 0 ; 0x1de: 0x0000
c、通過kfed merge /dev/oracleasm/disks/OADB_DATA_DISK_1 text=/tmp/disk1.txt
d、另外兩塊磁盤也執(zhí)行如上操作
e、sqlplus / as sysasm ——select group_number, disk_number, mount_status, header_status, name, path from v$asm_disk; 發(fā)現(xiàn)磁盤頭信息已顯示為MEMBER，+DATA也成功mount

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KFED修復ASM磁盤頭

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