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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

6389.0. "CAN YOU UPGRADE ARRAY410 TO ARRAY450?" by ALBANY::PEPLOWSKI (Paul Peplowski (Peppy) Albany N.Y. dtn:344-7228) Tue Feb 11 1997 12:51

    HI:
    	Does anyone known if you can upgrade a raid array 410 to a
    raid array 450 by just installing the new boards or do you have to have
    a whole new backplane and p/s's ? Any info would be appreciated.
    
    					Thanks inadvance
    
    					Paul Peplowski ALO
    					DTN:344-7228
    
    
    
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6389.1SSAG::LARYteach 10,000 stars how not to danceTue Feb 11 1997 15:077
The differences between a RA410 and a RA450 are the 4 boards, the controller
bulkheads, the new external battery SBB and cables, and the firmware cards. 
There may be other differences that I'm forgetting, but I think that's it.

The new bulkhead provides the connector to hook the cache to the battery.

							Richie
6389.2there is an upgrade kit...STOWKS::BULTEWilko Bulte - European Storage EngineeringWed Feb 12 1997 09:097
see http://sniff.shr.dec.com , it should have
the docs outlining a 410 to 450 upgrade procedure

It is essentially replacing the HSZs & caches & adding 
external cache battery/ies

Wilko
6389.3promote the upgrade kitMSE1::PCOTERebuilt NT: 163, Rebuilt VMS:1Wed Feb 12 1997 11:3218

 Perhaps digital should attempt (or indice?) to promote this upgrade 
 by charging just a nominal fee. The reason is that the support
 cost (for digital) on the sw410 must be huge. Anyone care to publish
 the mtbf ?

 The cache backup battery design of of the hsz40 is extrememly problematic.
 (insert your own horror stories here) On the other hand, the sw450
 (hsz50) has been rock solid based on my personal observations and
 testing.

 It would seem like good business practice to offer a very attractive
 "hsz40 to hsz50 upgrade" and rid ourselves of the hsz40 headaches.

 imo,
 Paul