Conference ssag::ask_ssag

6405.0. "SWXCR re-config disks." by LEXSS1::GINGER (Ron Ginger) Tue Feb 18 1997 07:16

    I have a swxcr with 5 pairs of mirrored disks. I need to remove one of
    the pairs, and build a new raid set using those 2 drives and a couple
    new slots.
    
    Problem is, the unit I wnat to move is Group B. I must keep the current
    Group C, D, and E. 
     
    If I delete C,D, E and B, then add back the drives that were C,D, and
    E, moving them up now to B, C, D. but do NOT do an init, will the data
    survive?
    
    I know how to handle the changes to Unix, and I know to be sure I get
    the config right  when I do it, but will the controller let me use a
    'new' mirror set that I did not init?

    
    If somebody were to ask me that question (did you?), then I would say:
    
    - First insure you have up to date backup's (just in case)
    
    - Delete any LUNs and groups you have to (be sure to have the picture
    	right WHICH belong together)
    
    - Add groups and LUNs, without init. 
    
    - Run a Parity check to prevent you had a bad day and things got
    	messed.
    
    I do NOT have active references but (what I understand of how they
    work), there is a limitted risk.
    
    However, I guess the OFFICIAL word would be: Do INIT them and restore.
                                                                   
    			Jan Visser