[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference netcad::hub_mgnt

Title:	DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:	Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:	NETCAD::COLELLADT

Created:	Wed Nov 13 1991
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	4455
Total number of notes:	16761

3125.0. "DECHUB 900 ISSUES..NEED ANSWERS" by OTOOA::MEVANS () Fri Jan 05 1996 18:35

    Gooday..
    
    I am writing this in concern to the issues I have seen locally on a
    hospital site with 29 Dechub 900's, running since the summer of 95.
    First problem we encountered was a hub burnt at the AC input. Checking
    into this there was a series of hubs starting at AS425XXXXX which were
    suspect to this problem. The fix is to replace the power supply
    backplane module,,,so where is this fix or FCO??
    
    Now another problem has come to light with seating of full height
    modules not making good contact to the backplane due to a combination
    of heat and weight. Again there is a fix in the form of a backplane
    reinforcement kit,,,where is it??  The module that seems most suspect
    is the 900FP module which will reset itself and either comes back or
    has to be manually reseated. Moving or replacing the module makes no
    difference.
    
    Being a large install we need to get these issues resolved as locally
    this could become high focus.

T.R	Title	User	Personal Name	Date	Lines
3125.1	Seen the same...hub burned	PTOJJD::DANZAK		`Mon Jan 08 1996 22:56`	14
	We just had a hub burn up at a customer (i.e. smoke, modules melted, etc.) We've sent it back to Michelle Bigelow for evaluation. With some rev A0x hubs there was a 'hub stiffener' problem. These were metal inserts put into the hub to 'stiffen' the backplane. There was also a restraining bar on the top of the hub mounting brackets that prevented flexion. I think that this was missing on earlier hubs. So, hope that helps. Nat Rounds or Bob Battersby may have more info on both. Regards, j
3125.2	ECO ????	OTOOA::MEVANS		`Tue Jan 09 1996 11:29`	10
	GOODAY.. Thanks for the info and yes I have heard there is a fix to stiffen the backplane but what is it and how do I get it. As per my note to expand.... all 29 hubs that are installed fall into the suspect range for the burning backplane modules, but is that the same range that require the stiffeners??? So is there an annnounced ECO?? FCO???
3125.3	Your note was forwarded to Support folks here at LKG...	NETCAD::BATTERSBY		`Tue Jan 09 1996 15:07`	7
	RE: .0 I've forwarded your base note to the NPSS support folks, and asked that they have someone get in touch with you with the appropriate info on how to help you resolve your customers issues with their HUBs. Bob
3125.4	We need an ECO/FCO field update	PTOJJD::DANZAK		`Wed Jan 10 1996 12:08`	7
3125.5	More problems with Hubs	TMAWKO::RMANDRY	ALL THINGS MUST PASS	`Wed Jan 10 1996 19:11`	5
	Add this problem too. I got a installed base of 24 Dechub 900. They all ran pretty good until last month. So far I have replaced two backplanes and an array of modules and power supplies. It seems we did not have that many problems till the H7894 was released.
3125.6	More on New Style Power Supplies	CSC32::BLACKMER	Ralph Blackmer - Mission Critical Support Team	`Thu Jan 11 1996 17:42`	17
	I just returned from a site visit with a Mission Critical customer who has replaced 5 of the new style power supplies in the past 4 weeks on "1" of their DEChub900s. They are very concerned as a failure in just this hub, brings down a better part of their production facility. They have already replaced a hub backplane too. I will post details on revisions but this is becoming "very visible" of late. Are there issues with the new style power supplies? I also read about the possible ECO/FCO to "firm up" the backplane in the hubs? Can I audit the customer hubs and see what the current status is on installed hardware to prevent flex in these? I would believe they do not have the necessary equipment in place to prevent this. Rb