RE: NEED HELP : Informix and replacement of an SSA disk exercise

Remember to record all your softlinks to raw devices. If you used hardlinks, you might have to create softlinks to the new IBM CE hardlinks. Old and new names must be exactly the same {full path name} and same size or bigger. e.g.: you had a hardlink /dev/rdsk/c1t8d0s4 that is not there anymore with the IBM CE but now have eg /dev/rdsk/c9t1d0s0 You will have to create a softlink: ln -s /dev/rdsk/c9t1d0s0 /dev/rdsk/c1t8d0s4 It is always a good idea to use softlinks to your raw devices. eg. /usr/informix/data/c0d0s1 -> /dev/rdsk/c?t?d?s? or eg. /usr/informix/disks/c0d0s1 -> /dev/rdsk/c?t?d?s? or eg. /usr/informix/...... -> /dev/rdsk/c?t?d?s? Much easier to migrate to new systems. --------------------------------------------------------- So if you can read all the data on SSA {Don't think you will be able to in this case, backup failed} Install IBM CE {disk pack or whatever it is} Create similar devices on IBM dd data from SSA to IBM Change Informix softlinks from SSA to IBM raw devices oninit Always good to have backups -----Original Message----- From: Ameerul@mesiniaga.com.my [SMTP:Ameerul@mesiniaga.com.my] Sent: Thursday, June 08, 2000 9:07 AM To: informix-list@iiug.org Subject: NEED HELP : Informix and replacement of an SSA disk exercise Hi everyone. Need help in this exercise. I have a RS6000 G40 with Aix 4.3.2 with Informix IDS7.31UC4, ISQL 7.20 and 4GL RDS 7.20. The informix main directory is in the main disk (non SSA) and the database dbspace contains lots of chunks where some chunks of the same dbspaces are in this SSA and the rest in other disks. This SSA disk has a degradation problem and need to be replace. It will be done by an IBM CE. That is why we had problem doing ontape -s backup giving the error : "Archive failed-ISAM error. An error has occured during archive backup" In the end, in the error report (errpt) for aix, it is a SSA disk failure. We tried dbexport and it was ok. We not sure how the dbimport would be. The question is that worries me is that what should be done on the Informix portion during this SSA disk replacement exercie?? I was panning on this : - dbexport the database using dbexport dbname -ss - system backup on the OS - capture the informix details - onconfig, sqlhosts, onstat -d, databases, log files, - IBM CE will migrate the disk contents & we test the informix and application - If there is problem, need to recreate the engine, dbpaces, chunks, logs etc - reinitialize informix - dbimport database If anyone has better suggestions, please help me here. Thank you very much.