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Conference smurf::dec_mls_plus

Title:dec_mls_plus
Moderator:SMURF::BAT
Created:Mon Nov 29 1993
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:534
Total number of notes:2544

437.0. "Are RZ28M disks supported?" by COMICS::CORNEJ (What's an Architect?) Tue Jan 14 1997 13:17

T.RTitleUserPersonal
Name
DateLines
437.1need to order a new dunno stampSMURF::BATSegui la tua beatitudineTue Jan 14 1997 19:433
437.2COMICS::CORNEJWhat's an Architect?Wed Jan 15 1997 09:1810
437.3wednesday's are always bad days. or was that tuesday's?SMURF::BATSegui la tua beatitudineWed Jan 15 1997 14:3911
437.4a man with the answerSMURF::BATSegui la tua beatitudineWed Jan 15 1997 18:3718
437.5Why does the model of disk make a differenceCHEFS::HOWLETT_TAvoiding the cracks in the pavementWed Feb 05 1997 13:1622
    Hi
    
    Please help
    I am the account manager trying to find hardware to sell with MLS+,
    so please excuse me if I am inaccurate with technical  details, but 
    I am confused by the cautiousness of the previous answers.
    
    I have never encountered any problems with Digital Unix, where
    it matters that a RZ28 is a RZ28D or Rz28M or Rz28B. 
    
    So why does MLS+ care? Do you use different drivers that are in 
    some way model specific?
    And what about the question that the disks will be behind the HSZ's
    Isnt it the HSZ firmware that drives the physical disk?
    
    Regards
    Terri
    
    
    
    
    
437.6don't be discouraged by Mr. "If you can't say No, say Nothing"SMURF::BATSegui la tua beatitudineWed Feb 05 1997 17:2335
    The only reason why MLS+ cares is because we are talking about
    V3.1A here (or are we?) and not V4.0A (the soon-to-be-out version).
    
    MLS+ V3.1A is based on several obsolete versions of DIGITAL UNIX -- The
    kernel (which includes the device drivers) is based on DU V3.2B and the
    rest on V2 (yes that old).  IF the RZ28M is happily running with
    DIGITAL UNIX system V3.2B somewhere, then it should happily run with an 
    MLS+ V3.1A system.  The problem for us comes if for some unforeseen
    reason it doesn't.  If the problem is something that is broken with the
    base software (the non-MLS+ modifications), then it will take resources
    we do not have -- and base UNIX development will not offer -- to fix.
    They tell us "get the next version" -- we'd like to say that to
    government customers too...
    
    In theory, when a software product description says we support a
    given piece of hardware, what that is supposed to mean is that someone
    in QA or engineering actually ran the software on or with that
    hardware.  We in MLS+ have asssumed that because we based to DIGITAL
    UNIX we support all they support (with exceptions where some security
    policy disallows, e.g., ASCII printers, or where some more complex
    modifications had to be made to a daemon or related data files and no
    one said there was a marketing requirement to put the work in the
    schedule, e.g., print servers).  Since we have not tested it (no
    equipment) and have neither the schedule nor the people to test it,
    Mike feels uncomfortable saying it is "supported". Me?  I'll commit and
    then likely live (always hopeful!) to regret it :-) 
    
    No we don't use different drivers -- just secure ones :-) Meaning:
    there are sometimes modifications to the drivers that have to do with
    security policy, but the fundamentals of the drivers are untouched.
    
    I don't know what you mean about the question that the disks will be
    behind the HSZ's -- from the CPU's point of view that's where they are
    because the HSZ firmware which drives the disk logic is in-between... 
    what's the question?
437.7Just support nervousnessCHEFS::HOWLETT_TAvoiding the cracks in the pavementThu Feb 06 1997 09:1821
    Hi
    
    re 
    I don't know what you mean about the question that the disks will
    be behind the HSZ's -- from the CPU's point of view that's where they
    are because the HSZ firmware which drives the disk logic is
    in-between... what's the question?
    
    I dont know either, but my customer just wants to be supported,
    and avoid the misery of the support center being unable to help,
    but they also want to use rz28d's so they are thinking
    "if they just use the d's on the Hsz's, why would Mls+
    care? As the Hsz40 is supported."
      
    Regards
    Terri
    P.S.  I will start a new topic on this,
         but the 2100 server is now a 2100A!
    
                                           
    
437.8Its M's or D's CHEFS::HOWLETT_TAvoiding the cracks in the pavementThu Feb 06 1997 10:0421
    Hi Again,
    
    I am trying to sell (as in Take order for) 6 Mls+ servers with lots
    of disks about 80, the disk options are
    From the price file
    qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
     -RZ28 -VA      2.1 GB Disk w/snap-in carrier          1,007.00    M   
     -RZ28B-VA      2.1GB DISK W/SNAP CARRIER              1,181.00    M  
     -RZ28D-VA      2.1GBF 3.5"DK:IN MOD CARRIER             821.80    A   
     -RZ28M-VA      2.1 Gbf 3.5"DK in Mod Carrier            723.10    A   
    
    So its M's or D's ,neither is on the SPD,so we'll go for D's. I guess 
    this is a pain for you, and it would waste your time testing it. 
    Maybe I sell them, and my customer agrees if they hit a problem they
    send you a spare one?
    
    Regards
    Terri
    
                    
    
437.9RZ28M-VA doneSMURF::BATSegui la tua beatitudineFri Feb 07 1997 18:1115
From:	KAMLIA::lct "Lee Ternullo USG  07-Feb-1997 1256"  7-FEB-1997 13:01:14.59
To:	bat@dec:.zko.smurf (Segui la tua beatitudine)
CC:	lct@DEC:.zko.kamlia
Subj:	Re: Notefile DEC_MLS_PLUS Note 437.8 [RZ28 support issue]



QA has been running RZ28M-VA's off and on for several months now
with no issues that I know of.

Also, they do appear in the MLS+ V4.0a /etc/disktab that one would
use to label a disk.

-lee