Re: Moving On-Line

Posted in 1995

Gary A. Mitchell — Tue, 22 Aug 1995 00:27:42 GMT — source: Informix-list mailing list archive (1991-1998)

In article <DDIJvq.3w0@cix.compulink.co.uk>, shemminga@cix.compulink.co.uk ("Stuart Hemming") wrote: >I've been asked to try and get some info on the following: > >Imagine an Online system with number of dataspaces on one logical volume >on an RS6000. This logical volume is split over a number of small >physical devices. The owners of this system wish to replace their small >disks with a large one. > >What is the best way to move the dataspaces without upsetting the engine? > >Is AIX's logical volume manager good enough to convince Online that it's >dealing with one disk or does the engine have to store absolute data >addresses on the disk. > Yes and No. I tried to move another Logical Volume on the same physical disk that the RAW logical volume was located on and really got burned. The IBM support center confirmed a bug in AIX 3.2.5 when moving a logical volume. It just happened to change all the permissions on ALL my informix devices for ALL instances so Informix could not read or write them. I'd back it up, delete the old volume, recreate it, and then restore it. But, I'm smarter now. Gary (mitch@lexmark.com)