Hi Monks, I am working on a script to automate health check of EMC VNX box in this i am using command nas_checkup to get the output . Problem I am facing right now this command takes 10 mins to complete health check OUTPUT .But this script is returing first 2 lines of output in just seconds.Need help!

#!/usr/bin/perl
use Net::SSH2;
use warnings;
use strict;

use diagnostics;
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime(t
+ime);
my $datestring = sprintf("%4d_%02d_%02d_%02d",($year + 1900),($mon+1),
+$mday,$hour);
my $sw;
use constant BUFLEN => 50_0000 ;
my $user = "";
my $password = "";
my $buf;

my $channel;

my $command;
my $read;


#get ip’s
#open file
open(FILE, "c:/scripts/ips2.txt") or die("Unable to open file");
# read file into an array
my @data = <FILE>;
# print  output to file
open OUTPUT, '+>', "EMC-$datestring.txt" or die $!; # create / open th
+e out.txt for STDOUT redirection
open ERROR,  '+>', "err-$datestring.txt"  or die $!; # create / open t
+he err.txt for errors redirection
STDOUT->fdopen( \*OUTPUT, 'w' ) or die $!; # redirecting the STDOUT to
+ file
STDERR->fdopen( \*ERROR,  'w' ) or die $!; # redirecting the errors to
+ file
foreach $sw (@data)
{
my $ssh = Net::SSH2->new();
if(!$ssh->connect($sw)){
print("Connection Failed\n");
exit(1);
}
if(!$ssh->auth_password($user,$password)){
print("Authentication Failed");
exit(1);
}

print "###############################################################
+######################\n";
print "Status report of EMC VNX with IP:$sw \n";
print "###############################################################
+######################\n";
# Printing Hardware
print "Health Check \n";
{
$buf ="";
my $channel = $ssh->channel();
my $command = $channel->exec("/nas/bin/nas_checkup");
my $read = $channel->read($buf, BUFLEN );
warn 'More than', BUFLEN, 'characters in listing' if $read >= BUFLEN;
print "$buf \n";

}

print "###############################################################
+######################\n";
print "END of Report \n";
print "###############################################################
+######################\n";
}
[download]

Output , I am getting right now ================================

##################################################################################### Status report of EMC VNX with IP:10.193.140.139 ##################################################################################### Health Check Check Version: 8.1.9.217 Check Command: /nas/bin/nas_checkup ##################################################################################### END of Report #####################################################################################