Using Kfed utility for ASM
References-
1. How To Gather & Backup ASM/ACFS Metadata In A Formatted Manner
version 10.1, 10.2, 11.1, 11.2 and 12.1? (Doc ID 470211.1)
2. SRDC - How To Collect The Required Information For Support To
Validate & Troubleshoot ASM/ASMLIB Issues. (Doc ID 1678592.1)
Understanding kfed –
kfed is an undocumented ASM
utility that can be used to read and modify ASM metadata blocks. It is a
standalone utility, independent of ASM instance, so it can be used with either
mounted or dismounted disk groups. The most powerful kfed feature is its ability
to fix corrupt ASM metadata.
Basic kfed command to
get some information about your asm disk
Below command will read asm disk DATA1
and give you significant details about disk.
kfed read /dev/oracleasm/disks/DATA1
|egrep -i "kfdhdb.hdrsts|kfdhdb.dskname|kfdhdb.grpname|kfdhdb.fgname|kfdhdb.secsize|blksize|driver.provstr|kfdhdb.ausize"
Sample
output –
Legend:
kfdhdb.hdrsts - Status of
disk
kfdhdb.dskname - Name
of the disk
kfdhdb.grpname - Name
of disk group the disk belongs to
kfdhdb.fgname - Name
of failure
group the disk
belongs to
kfdhdb.secsize - Sector size
of disk
kfdhdb.blksize - Blocksize of
disk
kfdhdb.driver.provstr - Provision string for use with asm
kfdhdb.ausize - AU size
