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Conference ssag::ask_ssag

Title:Ask the Storage Architecture Group
Notice:Check out our web page at http://www-starch.shr.dec.com
Moderator:SSAG::TERZAN
Created:Wed Oct 15 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6756
Total number of notes:25276

6521.0. "NT Backup from offline half of mirror set?" by TEGAN::LOWE (Brett (ODIXIE::) Lowe (770-343-2072)) Wed Mar 26 1997 11:59

    I am on site with a customer, (who doesn't have a copy of the Command
    Console SW installed yet) who has an AlphaServer running NT
    V3.51 or V4.0 using mirrored disks on a KZPSC (SWXCR).  He wants to
    remove one member of the mirror set and then use the offline copies as
    the source for backups.  I have already told them this is not the best
    way to do backups.
    
    I haven't done this under NT, so...is it possible using the SWXCR sw
    and NT without taking the system down?
    
    thanks,
    
    brett
T.RTitleUserPersonal
Name		DateLines
6521.1Confused?UTRTSC::VISSERThu Mar 27 1997 14:0818
    .0
    
    1. Command Console SW? I assume you do NOT refer to SWCC, but to
    	SWXCRMGR, because this is the guy being able to talk to the KZPSC.
    
    2. What are "offline copies"? Pull the disk and move to another system?
    	If YES: StorageWorks disk are RECONFIGURABLE; it is NOT a removable
    	device (disk-SBB's are garanteed for a maximum of 150 removal's/
    	insertions). Additionally: there are so much risks involved and
    	it might even not work (or sometimes; sometime not).
    	Removal of a disk out of a Mirrorset using the Online SWXCRMGR
    	does NOT make this disk visable or reconfigurable as a logical
    	unit on the fly.
    
    Summary: What your customer wants CANNOT be done.
    
    			Jan Visser