I've used both the the NDSm modules and the ActiveX/COM kludge in Netware related sysadmin scripts over the years, but I find that munging the output from Novell's powerful, but needlessly complex command line utilities usually works best.

#!c:\perl\bin\perl.exe -w

# props to http://myweb.facstaff.wwu.edu/~riedesg/sysadmin1138/ for mo
+st of this code!
use strict;
use warnings;

use Net::SNMP;
use Time::Seconds;
use Time::Piece;

# provide your SNMP community string and your list of servers below
my $community = 'public';
my @servers = uc ( shift ) || qw/FS1 FS2 FS3/;  # lets you specify a s
+erver on the command line for quick query
# end of user-provided information

my $timenow = localtime;  # Mon Aug 26 14:30:09 2002
$enddate) = map $_->strftime('%Y-%m-%d'), $timenow, $weeks, $start, $e
+nd;
my ($timestamp) = map $_->strftime('%Y-%m-%d '), $timenow;

my @report;
my $NWBaseOID = ".1.3.6.1.4.1.23.2.28.2.14";    # .iso.org.dod.interne
+t.private.enterprises.novell.mibDoc.nwServer.nwFileSystem.nwFSVolTabl
+e
my $NWNameOID = $NWBaseOID . ".1.2.";        # .iso.org.dod.internet.p
+rivate.enterprises.novell.mibDoc.nwServer.nwFileSystem.nwFSVolTable.n
+wFSVolEntry.nwVolPhysicalName
my $NWVolSizeOID = $NWBaseOID . ".1.3.";    # .iso.org.dod.internet.pr
+ivate.enterprises.novell.mibDoc.nwServer.nwFileSystem.nwFSVolTable.nw
+FSVolEntry.nwVolSize in KB
my $NWVolFreeOID = $NWBaseOID . ".1.4.";    # .iso.org.dod.internet.pr
+ivate.enterprises.novell.mibDoc.nwServer.nwFileSystem.nwFSVolTable.nw
+FSVolEntry.nwVolFree in KB
my $NWVolPurgableOID = $NWBaseOID . ".1.5.";    # .iso.org.dod.interne
+t.private.enterprises.novell.mibDoc.nwServer.nwFileSystem.nwFSVolTabl
+e.nwFSVolEntry.nwVolFreeable in KB
my $NWVolMountedOID = $NWBaseOID . ".1.8.";    # .iso.org.dod.internet
+.private.enterprises.novell.mibDoc.nwServer.nwFileSystem.nwFSVolTable
+.nwFSVolEntry.nwVolMounted, 1=mounted, 2=unmounted

for my $servername (@servers) {
    my ($Session, $Error) = Net::SNMP->session( -hostname => $serverna
+me, -community => $community );
    my $Table = $Session->get_table( -baseoid => $NWBaseOID );
    print STDERR "No info for $servername!\n" unless defined $Table;
    push @report, "$timestamp\t$servername / ERR\tERR\n" unless define
+d $Table;
    next unless defined $Table;
    for (my $drivenumber = 1; $drivenumber < 256 ; $drivenumber++) {  
+   # Cluster drives start at 255 and work DOWN
        next unless $Table -> { $NWVolMountedOID . $drivenumber };
        next if $Table -> { $NWNameOID . $drivenumber } =~ /_ADMIN/;
        my $diskname    = $Table -> { $NWNameOID . $drivenumber}.":"; 
+# Appends a ":" for backward compatibility
        my $totalsize   = $Table -> { $NWVolSizeOID . $drivenumber};
        my $freespace   = $Table -> { $NWVolFreeOID . $drivenumber};
        my $utilized = 100 - int ( $freespace / $totalsize * 100 );
        push @report, "$servername / $diskname\t$utilized\n";
    }
    $Session->close();
}
print sort @report;
[download]

Unfortunately I've never used Perl to interface with NDS so I can't be much more help than this.

Good Luck,

Rich