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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

6580.0. "Online Upgrade from HSJ40 to HSJ50?" by COLES1::SIEK () Tue Apr 15 1997 08:25

    Hello!
    
    I have a question regarding the upgrade of a Hsj40 to
    a HSJ50:
    
    1. We shadow the disks on one HSJ40 with the disks on another
       HSJ40. We want to upgrade the HSJ40s with HSJ50.
       Can we do this online:
       a.  dismount the shadowmembers on one HSJ40
       b.  set the Pathes to off on that HSJ40
       c.  replace the HSJ40 Controller with a HSJ50
       d.  setup the units on the new controller
       e.  go online again and run a shadow copy
       f.  repeat the steps a-e for the other HSJ40
    
    2. Do we have to init the Stripesets/Disks in step d, or
       is the dataformat the same on HSJ40 and HSJ50?
    
    Regards
    Herbert

T.R	Title	User	Personal Name	Date	Lines
6580.1	Yup exactly the same but a few caveats	SSDEVO::RMCLEAN		`Tue Apr 15 1997 10:51`	35
	The disks on a HSJ50 and HSJ40 are EXACTLY the same!!! If you init the disks with the HSJ50 you may loose something (Like Forced error information). <<< Note 6580.0 by COLES1::SIEK >>> -< Online Upgrade from HSJ40 to HSJ50? >- Hello! I have a question regarding the upgrade of a Hsj40 to a HSJ50: 1. We shadow the disks on one HSJ40 with the disks on another HSJ40. We want to upgrade the HSJ40s with HSJ50. Can we do this online: a. dismount the shadowmembers on one HSJ40 b. set the Pathes to off on that HSJ40 >> You can do a shutdown here instead to ensure the cache is flushed. >> also do a show to ensure the cache is flushed! You want this because >> you will be replacing the cache module. c. replace the HSJ40 Controller with a HSJ50 d. setup the units on the new controller >> d1. set paths on on the HSJ50 Keeping the paths off will keep the system happier as the units show up while you are doing the configuration. e. go online again and run a shadow copy f. repeat the steps a-e for the other HSJ40 2. Do we have to init the Stripesets/Disks in step d, or is the dataformat the same on HSJ40 and HSJ50? >>Absolutely NOT. Be REAL careful to ensure that your configuration is EXACTLY >>the same as it was on the HSJ40. Regards Herbert
6580.2		KERNEL::LOANE	Comfortably numb!!	`Thu Apr 17 1997 07:31`	2
	Does the same hold for upgrading from HSD30 to HSZ50?? Is the Metadata compatible??
6580.3	Not quite	SSDEVO::RMCLEAN		`Thu Apr 17 1997 10:20`	3
	Not quite. They are the same for JBOD and raid5 sets but there is a problem with geometry between HSJ and HSZ.
6580.4	How HSD to HSJ?	DV780::THURY	Making it so...	`Tue Apr 22 1997 09:20`	8
	How about moving from HSDxx to HSJxx? I'm about to start an engagement with a customer who is migrating from DSSI to CI for his disk farm. I've been told that he is now using HSD30s and is running with mirror sets. Any problem just moving the RZxx's to the HSJ50s, and rebuilding/redefining the mirror sets? Denny
6580.5	Nope	SSDEVO::RMCLEAN		`Tue Apr 22 1997 11:01`	3
	I see no reason to rebuild the mirror sets. Just configure the HSJ50 in a similar manner. Just backup your disks, configure the HSJ50, and plug in the disks and you are done.