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Full Discussion: Quorum and hdisk issue
Operating Systems AIX Quorum and hdisk issue Post 302827079 by bakunin on Thursday 27th of June 2013 10:36:18 PM
Old 06-27-2013
You should really describe your problem better / more exactly. The following was in no way obvious from you first posting:

Quote:
Originally Posted by newtoaixos
before i do the varyoffvg i need to unmount the 2 filesystems present under that VG.
Are the FSs mounted and accessible?? What is the output of:

Code:
lsvg -l appvg
lsvg -p appvg

Somehow i doubt that the filesystems are still available when the VG has been closed.

What does "errpt" tell you? The "quorum" is the minimum number of disks that have to present to make a VG valid. Once less disks than this quorum are there the VG is forced offline, which means all the FSs belonging to it are unmounted (which is why i doubt they really are there). Further, there must be some entry in the "errpt" log regarding a hdisk device failing, otherwise the quorum wouldn't have been lost.

Quote:
I have informed the application team already about this issue. probably when they give me the downtime I will unmount and then try to varyoff the VG.
NO!

When they decided to commission a system where disks are not redundant they forfeited any right to have an uninterruptible service. Hardware is failing from time to time, that is old news. Either you have hardware (regardless of what it is: network cards, disks, processors, power supplies, ... ) redundant, so that when one part fails the other is still there or you have hardware not redundant: then you have to expect the service to be interrupted from time to time. Everything else is "wash me, but don't make me wet in the process": rubbish. No admin in his right mind lets get himself in such a double-bind situation.

Your 2 disks could not have been redundant, because in this case the quorum should have been deactivated: a VG consisting of two mirrored disks is safe even if there is only one of these disk present. (If the disks were indeed mirrored: i suggest firing the idiot who configured such a horse manure on the spot for proven incompetence.)

Additional question: what are these disks? LUNs? (provided via VIOS?, NPIV? other?) Physical disks? RAID-sets? Show the output of these commands:

Quote:
lsdev -Cc disk
lsattr -El hdisk1 / hdisk2
Background is: is there a chance that the inavailability of the disk(s) might be temporary in nature? It might work if you issue

Code:
varyonvg -bu appvg

in this case.

I hope this helps.

bakunin
 

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metaimport(1M)						  System Administration Commands					    metaimport(1M)

NAME
metaimport - imports disk sets into existing Solaris Volume Manager configurations SYNOPSIS
metaimport -s setname [-n] [-f] [-v] [disks]... metaimport -r [-v] [disks]... metaimport -V metaimport -? DESCRIPTION
The metaimport command allows the importing of disk sets, including replicated disk sets, into an existing Solaris Volume Manager configu- ration. Replicated disk sets are disk sets created using remote replication software. The default Solaris Volume Manager configuration specifies a maximum number of disk sets that can be configured. The metaimport command fails if importing the disk set would result in exceeding the number of disk sets configured on the system. To increase the number of disk sets allowed on a system, see the . Use metaset(1M) or metastat(1M) to view the configuration of the imported set. You must run metaimport as root. metaimport requires a functional Solaris Volume Manager configuration before it runs. OPTIONS
The following options are supported: -f Force the import, even if a quorum of replicas from the imported disk set is not available. This option could result in cor- rupt configurations and should only be used when metaimport fails with the "Insufficient quorum detected; exiting" error. If only a partial disk set is available, this option might be necessary to successfully import. Some or all data could be cor- rupted or unavailable when importing a partial set or a set lacking a replica quorum. -n Does not actually perform the operation, but shows the output or errors that would have resulted from the operation, had it been run. -r Report on the non-configured disk sets found on the system. If no disk device or LUN is specified, metaimport reports on all non-configured disk sets attached to the system. When the name of one disk is specified, metaimport reports on the disk set (or virtual LUN) containing the specified disk. If two or more disks are specified, metaimport reports on the set (or sets, if they belong to different disk sets) containing the specified disks. If two or more disks are specified, metaimport reports on the set (or sets, if they belong to different disk sets) containing the specified disks. This option can be used in conjunction with the -v option to give verbose output on each disk set reported. -s setname Specify the disk set name to use when importing. The imported disk set will be called setname, without regard to the name it may have had on a different system. -v Verbose. Provides detailed information about the metadb replica location and status. It also provides detailed information about the disk set configuration and status similar to the "metastat -c" output. -V Version information. -? Display a help message. EXAMPLES
Example 1 Importing a Disk Set The following example creates a disk set called blue and identifies c1t5d0 as a disk containing a state database replica from the disk set being imported. # metaimport -s blue c1t5d0 Example 2 Reporting Disk Sets to Import The following example scans all disks and LUNs attached to the system and configured as part of the system. It scans for disks that could be part of a disk set to be imported. Components that are already part of the Solaris Volume Manager configuration are ignored. This use of metaimport provides suggested forms of the metaimport command to use to actually import the disk sets that have been found. You can specify a component on the command line to reduce the scope of the scan and generate results more quickly. # metaimport -r EXIT STATUS
0 Successful completion. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWmdu | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ SEE ALSO
mdmonitord(1M), metaclear(1M), metadb(1M), metadetach(1M), metahs(1M), metainit(1M), metaoffline(1M), metaonline(1M), metaparam(1M), metarecover(1M), metareplace(1M), metaroot(1M), metaset(1M), metastat(1M), metasync(1M), metattach(1M), md.tab(4), md.cf(4), mddb.cf(4), attributes(5) SunOS 5.11 28 Oct 2005 metaimport(1M)
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