Conference ssdevo::hsd30_product

290.0. "Is this supported?" by KAOFS::C_MENENDEZ (CARLOS, SOO ONT MCS (705)945-7862) Fri Feb 28 1997 09:47

    	We are in the process of reconfiguring some systems for a customer,
    and as it ends up, they will have a DEC7620 with a whole bunch of
    unused KFMSBs. Out ofthe 5 installed on the system we will only need 2
    and thus this question was asked:
    
    	That want to "shadow" the HSD30s. By that they mean connecting one
    side to KFMSB 0 and the other side to KFMSB 1 and the other HSD between
    KFMSB 2 and KFMSB 3.
    
    	I see 2 problems wit this, but I need some input to see if myu
    theories are true.
    	
    	1) The console might get mixed up when it tries to see the drives
    and it will show only one HSD (possibly the first KFMSB that gives the
    drive info up?).
    
    	VMS will definitely get confused, ad it will see a whole bunch of
    drives with same unit number (DUA drives). 
    
    	I guess the customer's line of thought is that they can sort of dual
    host the HSDs as if running a CI cluster, although I see no lock mana
    ger running even if the drives were available, plus how would the
    HSDs switch control of the drives in c ase of failure?
    
    	Any input on this?
    
    	Thanks,
    
    	Carlos 

Did you set the allocation class to be the same?

    You can not connect 2 adapters from a single host together.
    
    So you are correct, this can not and should not be done.
    
    
    Regards,
    Bert

    	Thanks guys....