Conference msgaxp::optical

811.0. "How many jb's can be MSCP served" by CSC32::R_ROBERTSON () Wed Mar 19 1997 13:11

    
    HOW TO FIND OUT HOW MANY DEVICES CAN BE SERVED TO THE CLUSTER
    
    The number of disks that can be served to the cluster will
    vary by vms type and version. For instance when VAX VMS v6.1
    originally came out it allowed 512 disk devices to be served
    but Alpha VMS was still set to 256, I believe that was corrected.
    
    As the new RW557's with 238 platters get out there (476 jb devices)
    and with more customers having multiple jukeboxes, the following
    is a quick way to determine how many can be MSCP served.
    
    
    $ lib/extr=$dsrvdef sys$share:lib.mlb
    
    $ edit/read lib.mar
    .
    .
    .
    $EQU    DSRV$B_HOSTS    164
    $EQU    DSRV$S_UNITS    2048
    $EQU    DSRV$L_UNITS    196   <--------------****************
    $EQU    DSRV$L_OPCOUNT  2244  <--------------****************
    $EQU    DSRV$L_ABORT_CNT        2248
    $EQU    DSRV$L_GET_CMD_CNT      2252 formula is L_opcount - L_units
    $EQU    DSRV$L_GET_UNT_CNT      2256             _________________
    $EQU    DSRV$L_SET_CON_CNT      2260
    $EQU    DSRV$L_AVAIL_CNT        2276                   4
    $EQU    DSRV$L_ONLIN_CNT        2280         (each entry = 4 bytes )
    $EQU    DSRV$L_SET_UNT_CNT      2284
    $EQU    DSRV$L_DET_ACC_CNT      2288
    
    
                                                   2244 - 196
                                         so       ______________ = 512
    
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    Robby,
    
    Good reference information.
    
    Rob