/sys$common/syshlp/SANCP.HLB  —  SET Command
    Sets WWID characteristics

    SET WWID /PRODUCT_ID=<product-id-substring>
             /PORT=<wwid>
             /CAP=<cap>
             /[NO]WAIT
             /DEFAULTS

1    /PORT=<wwid>

    Select WWIDs to modify by fully matching the specified Port WWID.
    /PORT may not be used with /NODE

2    /PRODUCT_ID=<product-id-substring>

    Select WWIDs to modify by fully matching (including case) the
    specified substring to any portion of the WWID's product ID

3    /CAP=<cap>

    Specifies the maximum number of I/Os which will be allowed to be
    active at any time across all paths to all LUNs on the selected
    WWIDs. SANCP and the port drivers will enforce minimum and maximum
    values, are currently 8 and 65,535 (decimal) respectively

    Changing a WWID's I/O cap to other than the stock value can greatly
    impact I/O performance, so, to ensure that only intended WWIDs are
    modified, unless /DEFAULTS is used /CAP is only supported with some
    combination of /PORT, /NODE and /PRODUCT_ID

4    /[NO]WAIT

    /WAIT and /NOWAIT are only supported with /CAP

    /WAIT - the I/O cap value set with /CAP will not take effect until
    at least one Queue Full has been seen on the selected WWIDs; if the
    Queue Full count is non-0 when this qualifier is processed, the cap
    will take effect immediately

    /NOWAIT - the I/O cap value set with /CAP will take effect
    immediately

5    /DEFAULTS

    Restore default values for all fields of the selected WWIDs.
    /DEFAULTS cannot be used with /CAP
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