Today we are going to learn about the kfed “script for ASM disk troubleshooting” As per our new DBA in the journey of Database we are normally known about troubleshooting regards errors, Now we are going to learn about disk troubleshooting. Few lines of this post explain the definition.
The kfed is an undocumented ASM utility that is used to read and modify ASM metadata blocks. The kfed is a standalone utility, independent of any ASM instance, so it can be used with either mounted or dismounted disk groups.
[oracle@rac-node1 bin]$ cd /u02/app/oracle/product/11.2.0/dbhome_1/bin [oracle@rac-node1 bin]$ vi kfed #! /bin/sh rm /tmp/kfed_DH.out /tmp/kfed_FS.out /tmp/kfed_BK.out for i in `ls /dev/oracleasm/disks/*` do echo $i >> /tmp/kfed_DH.out ./kfed read $i >> /tmp/kfed_DH.out echo $i >> /tmp/kfed_FS.out ./kfed read $i blkn=1 >> /tmp/kfed_FS.out echo $i >> /tmp/kfed_BK.out ./kfed read $i aun=1 blkn=254 >> /tmp/kfed_BK.out done [oracle@rac-node1 bin]$
save the file
Run the kfed command i.e just for understanding
[root@rac-node1 bin]# $ORACLE_HOME/bin/kfed read /dev/oracleasm/disks/DATA5 kfbh.endian: 1 ; 0x000: 0x01kfbh.hard: 130 ; 0x001: 0x82kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD kfbh.datfmt: 1 ; 0x003: 0x01kfbh.block.blk: 0 ; 0x004: T=0 NUMB=0x0kfbh.block.obj: 2147483652 ; 0x008: TYPE=0x8 NUMB=0x4kfbh.check: 4263371227 ; 0x00c: 0xfe1de1dbkfbh.fcn.base: 0 ; 0x010: 0x00000000kfbh.fcn.wrap: 0 ; 0x014: 0x00000000 kfbh.spare1: 0 ; 0x018: 0x00000000 kfbh.spare2: 0 ; 0x01c: 0x00000000 kfdhdb.driver.provstr: ORCLDISKDATA5 ; 0x000: length=13 kfdhdb.driver.reserved[0]: 1096040772 ; 0x008: 0x41544144 kfdhdb.driver.reserved[1]: 53 ; 0x00c: 0x00000035 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: 4 ; 0x024: 0x0004 kfdhdb.grptyp: 1 ; 0x026: KFDGTP_EXTERNAL kfdhdb.hdrsts: 3 ; 0x027: KFDHDR_MEMBER kfdhdb.dskname: DATA5 ; 0x028: length=5 kfdhdb.grpname: DATAGROUP ; 0x048: length=9 kfdhdb.fgname: DATA5 ; 0x068: length=5 kfdhdb.capname: ; 0x088: length=0kfdhdb.crestmp.hi: 32975254 ; 0x0a8: HOUR=0x16 DAYS=0xc MNTH=0xa YEAR=0x7dckfdhdb.crestmp.lo: 1614891008 ; 0x0ac: USEC=0x0 MSEC=0x52 SECS=0x4 MINS=0x18kfdhdb.mntstmp.hi: 32975254 ; 0x0b0: HOUR=0x16 DAYS=0xc MNTH=0xa YEAR=0x7dckfdhdb.mntstmp.lo: 1614946304 ; 0x0b4: USEC=0x0 MSEC=0x88 SECS=0x4 MINS=0x18 kfdhdb.secsize: 512 ; 0x0b8: 0x0200 kfdhdb.blksize: 4096 ; 0x0ba: 0x1000 kfdhdb.ausize: 1048576 ; 0x0bc: 0x00100000kfdhdb.mfact: 113792 ; 0x0c0: 0x0001bc80 kfdhdb.dsksize: 81917 ; 0x0c4: 0x00013ffdkfdhdb.pmcnt: 2 ; 0x0c8: 0x00000002 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: 0x0a100000kfdhdb.grpstmp.hi: 32955279 ; 0x0e4: HOUR=0xf DAYS=0x1c MNTH=0x6 YEAR=0x7dbkfdhdb.grpstmp.lo: 1067915264 ; 0x0e8: USEC=0x0 MSEC=0x1c6 SECS=0x3a MINS=0xf 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: 0x00000000kfdhdb.acdb.aba.seq: 0 ; 0x1d4: 0x00000000kfdhdb.acdb.aba.blk: 0 ; 0x1d8: 0x00000000kfdhdb.acdb.ents: 0 ; 0x1dc: 0x0000kfdhdb.acdb.ub2spare: 0 ; 0x1de: 0x0000 [root@rac-node1 tmp]#
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