[Info-vax] [VMS083] WWID item code for $GETDVI?

[Peter 'EPLAN' LANGSTOeGER]

According to the VMS 8.3 Manuals/Help, "WWID" is a valid code for SYS$GETDVI
for disks & tapes. But so far I never have seen a value in return for disks

e.g.

$ WRITE SYS$OUTPUT F$GETDVI("$2$MGA50","WWID")
02000008:5006-0B00-00CA-75EA
$ WRITE SYS$OUTPUT F$GETDVI("$1$DGA1004","WWID")

$

and

$ SHOW DEVICE/FULL $2$MGA50
...
    WWID   02000008:5006-0B00-00CA-75EA
...
$ SHOW DEVICE/FULL $2$DGA1004
...
    WWID
...
$
 
Do you perhaps know, what the restrictions are
(or is it a bug in VMS V8.3 - and V8.2 and V7.3-2 -  and is still unfixed)?

>From http://openvms.compaq.com/doc/83final/4527/OVMS_83_SYS_SERV1.PDF

DVI$_WWID
On Alpha and I64 systems, returns the World Wide Identifier (WWID) of Fibre
Channel Disk and Tape devices as a string. The maximum length of this string
might change with new devices; therefore, HP recommends that a 380-byte buffer
be passed to this function.


Many TIA

-- 
Peter "EPLAN" LANGSTÖGER
Network and OpenVMS system specialist
E-mail  Peter at LANGSTOeGER.at
A-1030 VIENNA  AUSTRIA              I'm not a pessimist, I'm a realist