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Conference ssdevo::hsj40_product

Title:HSJ30/40 Product Conference
Moderator:SSDEVO::EDMONDS
Created:Mon Jul 12 1993
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1264
Total number of notes:4958

1234.0. "ECB replacement procedure question?" by CSC32::D_DONOVAN (SummaNulla(The High Point of Nothing)) Mon Apr 14 1997 13:19

	We just received our first HSJ50s and the V5.1 HSOF software.  In 
going over the procedure for replacing the ECB (External Cache Battery) 
in the "Servicing your StorageWorks Subsystem"; pp. 118-123, it instructs you 
to remove both the controller and cache module from the shelf (controller 
power) and then remove the ECB SBB.  We're very "curious" as to why the 
procedure includes this step.  Are there any inherent "dangers" if the 
modules aren't removed?

Thanks,

Dennis 

P.S.  	Will the ECB be part of the new controllers/cabinets that
	you will be announcing shortly?  
T.RTitleUserPersonal
Name
DateLines
1234.1That is the way it is currently recommended/testedSSDEVO::RMCLEANThu Apr 17 1997 17:341
Yes.... It hasn't been tested any other way.
1234.2C-SWAP requires module removalSSDEVO::MOEKaren Moe / Array Controllers Revenue ProductsFri Apr 25 1997 17:5414
    Historically, the C-SWAP utility has been used to control
    interaction between controllers when removing HSx30/40 modules,
    including the replacement of a battery.  To run correctly, C_SWAP
    expects the modules to be removed and looks for transitions on the
    "module present" bits for both the cache module and the controller
    of the pair whose ECB is being replaced.  As reply .-1 indicates, the
    battery replacement process was developed and tested using C-SWAP. 
    Although from the design of the ECB it would not appear necessary to
    remove the modules, we do not recommend replacing the ECB batteries
    using a procedure other than the C-SWAP process which has been
    documented.