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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

6447.0. "SCSI FiberOptic extender Laserlink III?" by MQOOA::LEDOUX (Vincent [email protected]) Wed Mar 05 1997 13:54

    My customer cannot get a Ancot 2004 Laserlink III
    to work on our KZPSA
    
    The Laserlink 3 is a 100 meter fiber-optics scsi extender.
    
    I know we do not support it, but I am just trying to 
    get a solution for the customer to get his SCSI
    bus extended > 100 meters.
    
    Has anyone got the gizmo to work on our KZPSA?
    
    Has anyone got ANY other brand SCSI extenders
    to work?
    
    I will be going on site next week, as he may have
    messed up his config.  The laserlink is a narrow-differential
    and the customer uses a dwzz? to convert the signals,
    with a Y cable.  After visiting the site,  I will have 
    a better picture of the hardware used.
    
    He called Ancot and they told him we may be using some
    "reserved" SCSI signal line(?)  No idea what they are
    talking about... We do use a purely standard SCSI bus
    on our KZPSA aren't we?...
    
    Any (unsupported) info welcome.
    
    Thanks,
    
    Vince.
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6447.1OTOOA::LAVIGNEWed Mar 05 1997 15:216
    It's to bad the customer can't wait a few months for a fully supported
    product.
    
    Regards,
    
    JP Lavigne
6447.2Two different products ??ANNECY::CHABORD_DDominique CHABORD @AEOThu Mar 06 1997 05:4811
    Hi,
    
    I thought the Ancot bridge name was FSB-8001 and LazerLink III a
    product from Applied Concept. Is there a move ?
    
    We tried to work with LazerLink II two years ago. It didn't work at
    all for the real world. Is the version III better ?
    
    
    regards
    
6447.3AncotFIEVEL::FILGATEBruce Filgate SHR3-2/W4 237-6452Thu Mar 06 1997 05:4822
We have been working for months to qualify a similar (very) product,
it seems every time we get the vendor to fix one problem, they create
another.

Ancot generally only sells their SCSI link/bridge products OEM because
they do not have the support staff for direct sales.  Any idea who the 
reseller was, this topic is expected to come up again.  

re: other brands to work, I have been through about a dozen vendors, some
advertise product but do not have the design complete, some sell product
but do not have the design complete

This technology is currently high profile and very high demand, drawing
many companies into the market.  Unfortunately almost all of these 
arrivals are under capitalized and under staffed, most have less than
10 employees.

I do know that one Ancot SCSI/FC product proved to be somewhat 
incompatable with the KZPSA.

Bruce
(Storage Perforamnce and Disaster Tolerant storage solutions)
6447.4keep it simpleCHEFS::THACKERAY_JFri Mar 07 1997 02:1114
    re .1
    
    I thought the LazerLink III was fast, narrow, single-ended, SCSI
    interface??
    
    If so, it's use with KZPSA/DWZZA will be fraught with dangers as
    everytime you 'mess' with the bus you increasing the dangers of timing
    problems, skew etc.
    
    so, UNSUPPORTED SUGGESTION - try to keep it simple, no dwzzas, short
    cables, relevant adapter (KZPAA?), but recognise the wisdom and
    experience in .3
    
    Jon     
6447.5More data.MQOOA::LEDOUXVincent [email protected]Tue Mar 11 1997 04:0148
    re: JP Lavigne
    Yes, but the product will ship in April.  They mentionned
    that worst case, thay may ship without Fiber Optics and wait
    for our product, I guess next fall.  They would prefer to
    solve it before though.  If you have a target release date,
    can you let me know?  They will agree to non-disclosure.
    
    re: Dominique Chabord & all.
    Yes you are right, They have tried a few and none seems to
    work.  They are now trying the Applied concept LazerLink III
    ACI2003 (Narrow Single Ended), not the Ancot model.  I got
    mixed up as I only talked to the guy over the phone.
    They got it to work on the  2100 system SCSI bus (Narrow SE),
    so there must be something wrong with the KZPSA SCSI bus(?).
    
    I am lending them a couple KZPAA to try, but since the final
    configuration requires to have 2 systems on each end of the 
    bus, can we change the KZPAA SCSI ID?  I assume all KZPAA
    are ID 7 right?
    
    Right now they are using the following starting at the Alpha:
    KZPSA-BB  
    BN21W-0B (Y cable/one terminator) 
    A cable that came with the fiber adapter (68Pins HD to 
       50 pins HD) note that the 68 pin connector do not have 
       pins at the outer edges thus leaving effectively 
       only 50 pins.
    The AC2003s, some fiber optics.
    A BA35R-SF (DWZZB and a RZ28D).
    Eventually, they will need an other system and an other
    BA35R-SF at either ends.
    
    They also tried adding a couple DWZZAs to convert from
    wide to narrow without luck.
    
    With the above configuration, the SRM console sees the remote
    disk, but a "test" command does not work and causes the system
    to "crash" when stopping the test.  The test command works on
    all other devices.
    
    My question remains, *IF* the KZPAA works, can we put 2 KZPAAs
    on the same SCSI bus?  Is there any other NCR810 based that
    exist with a SCSI ID jumpers/switches?
    
    
    Thanks
    
    Vince.
6447.6Who replaced Kevin Joyce?ARAFAT::SANDGRENIt's always too early to give up!Wed Apr 23 1997 11:296
I had some contacts with Kevin Joyce who was to my understanding Product
Marketing Mgr for the product hinted about in .1 and .3. Unfortunately he seems
to have left the company. Does anybody know who replaced him? I'm very anxious
to get the latest status of this product...

/Claes