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Full Discussion: Prize of being an Admin
The Lounge War Stories Prize of being an Admin Post 302651131 by bakunin on Tuesday 5th of June 2012 04:05:40 AM
Old 06-05-2012
Quote:
Originally Posted by hedkandi
..dont get me started on the 1st level support guy whom renamed a system to a single numeric value of "2" His excuse was that he wasn't aware what uname -S does in UNIX..last I checked he's still there
Well, in my last project i had such a colleague too: Once, the storage guy (also an AIX expert) wanted to do some performance tests. He created an empty LUN, imported it as hdisk device and wrote to this device directly using dd. His point was to not let the file system drivers mess up his measurement.

So far, so logical and absolutely correct. Now, enter the idiot: he saw what the storage guy did and us discussing the results. Three days later a productive system broke with some strange errors and was unable to boot again. The disks in the rootvg were damaged to an extent that even the PVID and the LVCB (partition information) were missing. It transpired, that he did "performance tests" too. But because he didn't really understand what the storage guy was doing, he didn't get himself a new and empty disk for that, but used the system disk to overwrite the first physical GB with hexadecimal zeros. Well, the disk was mirrored and the system would have survived that - but doing thorough work he did it on the second system disk too. Guess what happens, when both copies of a mirrored disk are destroyed.

We would have been able to restore the system pretty quickly using an mksysb from our central NIM server - unfortunately he had used not only the production system but this very system, our centralized software repository for all the AIX systems - for his "performance tests" too (along with a couple of other systems, but we found that out later). Most systems boot only very slowly from nulled out boot disks....

This guy is there in in systems administration for more then ten years now and this was not even the first time he did something this idiotic. Go figure.

bakunin
 

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metaimport(1M)															    metaimport(1M)

NAME
metaimport - imports disk sets into existing Solaris Volume Manager configurations SYNOPSIS
metaimport -s setname [-n] [-v] [-f] [disks...] metaimport -r [disks...] metaimport -V metaimport -? 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. 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 corrupt 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 corrupted 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 opera- tion, 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, metaim- port 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. -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. -V Version information. -? Display a help message. 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 0 Successful completion. >0 An error occurred. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWmdu | +-----------------------------+-----------------------------+ |Interface Stability |Stable | +-----------------------------+-----------------------------+ 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), metasync(1M), metattach(1M), md.tab(4), md.cf(4), mddb.cf(4), attributes(5) 16 May 2005 metaimport(1M)
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