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Operating Systems AIX Type of Logical Volume lost after vgexport/gvimport process Post 302257644 by shockneck on Wednesday 12th of November 2008 06:28:59 PM
Old 11-12-2008
IMHO an LV Type of "jfs" is misleading if one wants to create raw devices and should be avoided therefore. Preferably one uses another name for Type, e.g. "raw", so that it is easily visible in the LV's properties what this LV is.

What probably happened is: sbdy created that LV and either assigned the Type or left the Type field empty in which case the default type (i.e. jfs) was chosen. The Informix DB did something to the LV (perhaps the DB did not use a leading offset but wrote over the LV's first 512 byte destroying the Logical Volume Control Block LVCB that way). When exporting the VG you deleted every information of that VG from the server's ODM. As there was nothing to read from the LV during import the Type field now is empty.

That LV handling might have caused a drawback. If you just lost the information about that type you may be lucky. Older versions of AIX had problems when importing/changing LVs who's LVCB was destroyed. I don't know if/how that changed with AIX 5L onwards but you might not be able to import/change the LV's correctly. So check thoroughly that your DB can use the raw devices as it should.
 

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Audio::File::Type(3pm)					User Contributed Perl Documentation				    Audio::File::Type(3pm)

NAME
Audio::File::Type - represents an audio filetype DESCRIPTION
An instance of an object inherited from Audio::File::Type is returned by the constructor of Audio::File. This object currently provides access to the audio files information like its audio properties (bitrate, sample rate, number of channels, ...) and the data stored in the files tag, but also providing access to the raw audio data and other information should be easy to be implemented. METHODS
new Constructor. In fact you don't need to use it. Please use Audio::File which will call the appropriate constructor corresponding to the files type. init This method will be called by the constructor. It's empty by default and should be overwritten by inheriting subclasses to initialize themselfes. name Returns the name of the audio file. is_readable Checks whether the file is readable or not. At the moment it's only used by the constructor, but it will be more usefull with later versions of Audio::File. is_writeable Checks whether the file is writeable or not. At the moment you'll probably don't need to call this method, but it'll be more usefull as soon as changing the audio file is implemented. tag Returns a reference to the files tag object. See the documentation of Audio::File::Tag to learn about what the tag object does. audio_properties Returns a reference to the files audio properties object. See the documentation of Audio::File::AudioProperties to get information about what the audio properties object does. save Saves the audio file. This is not yet implemented but it should remember me to do it at some time.. :-) type Returns the files type. TODO
implement changing the file SEE ALSO
Audio::File, Audio::File::Tag, Audio::File::AudioProperties AUTHOR
Florian Ragwitz <flora@cpan.org> COPYRIGHT AND LICENSE
Copyright (C) 2004 Florian Ragwitz This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. perl v5.10.0 2005-02-18 Audio::File::Type(3pm)
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