Hello,
that looks very strange...
My root partition has a capacy of 64G. 42% of storage is used. This shows 
rrd-graph absolutely correct.

To check I created this evening new hosts on my faulty JFFNMS and the JFFNMS 
running parallel in a VM for my hardware host.

Following the prints from my faulty JFFNMS:

21:26:03 I262 : 
==========================================================================================
21:26:03 I262 : Start: 2009-06-14 20:55:00      Stop: 2009-06-14 21:20:00       
Measures: 5
21:26:03 I262 : storage_block_size(4) storage_block_count(1) 
storage_used_blocks(6)
21:26:03 I262 : 
------------------------------------------------------------------------------------------
21:26:03 New Event (16462): 2009-06-14 21:26:03 - 12 - 34 - / - alert - 
rrd_analizer_sla - Storage Used > 80%: 600 % - 9
21:26:03 I262 : sla : Cond0: ( 6 > ((1*80)/100))                    = 1  -TRUE- 
Used > 80%: 600 %
21:26:03 I262 : sla : Final Eval: True. INFO: Storage Used > 80%: 600 %

sudo /bin/sh -c 'php -q poller.php 34 262' jffnms
21:29:05  :  H  34 : Poller Start : 6 Items.
21:29:05  :  H  34 :  I 262 :  P   5 : storage_verify(): 31 -> 
verify_interface_number(): index not changed (time P:8.77 | 1.98) 
21:29:05  :  H  34 :  I 262 :  P  10 : 
snmp_counter:storage_block_size(.1.3...31): 4096 -> buffer(): 1 (time P:2.36 | 
0.54) 
21:29:05  :  H  34 :  I 262 :  P  20 : 
snmp_counter:storage_block_count(.1.3...31): 15556272 -> buffer(): 2 (time 
P:1.91 | 0.11) 
21:29:05  :  H  34 :  I 262 :  P  30 : 
snmp_counter:storage_used_blocks(.1.3...31): 6551204 -> buffer(): 3 (time 
P:1.63 | 0.16) 
21:29:05  :  H  34 :  I 262 :  P  60 : no_poller(): 0 -> rrd(*): 
storage_block_size:4096 - storage_block_count:15556272 - 
storage_used_blocks:6551204 (time P:0.28 | 38.98) 
21:29:05  :  H  34 :  I 262 :  P LPD : last_poll_date(): 1245007745 -> 
db(last_poll_date): 1 (time P:0.49 | 3.38) 
21:29:05  :  H  34 : Poller End, Total Time: 83.55 msec.

And here the printouts from my "good" JFFNMS:

21:34:19 I23 : 
==========================================================================================
21:34:19 I23 : Start: 2009-06-14 21:00:00       Stop: 2009-06-14 21:25:00       
Measures: 5
21:34:19 I23 : storage_block_size(4) storage_block_count(1) 
storage_used_blocks(6)
21:34:19 I23 : 
------------------------------------------------------------------------------------------
21:34:19 New Event (50): 2009-06-14 21:34:19 - 12 - 3 - / - alert - 
rrd_analizer_sla - Storage Used > 80%: 600 % - 9
21:34:19 I23 : sla : Cond0: ( 6 > ((1*80)/100))                    = 1  -TRUE- 
Used > 80%: 600 %
21:34:19 I23 : sla : Final Eval: True. INFO: Storage Used > 80%: 600 %

sudo /bin/sh -c 'php -q poller.php 3 23' jffnms
21:36:36  :  H   3 : Poller Start : 6 Items.
21:36:36  :  H   3 :  I  23 :  P   5 : storage_verify(): 31 -> 
verify_interface_number(): index not changed (time P:26.63 | 14.45) 
21:36:36  :  H   3 :  I  23 :  P  10 : 
snmp_counter:storage_block_size(.1.3...31): 4096 -> buffer(): 1 (time P:9.39 | 
3.9) 
21:36:36  :  H   3 :  I  23 :  P  20 : 
snmp_counter:storage_block_count(.1.3...31): 15556272 -> buffer(): 2 (time 
P:6.17 | 0.11) 
21:36:36  :  H   3 :  I  23 :  P  30 : 
snmp_counter:storage_used_blocks(.1.3...31): 6551434 -> buffer(): 3 (time 
P:7.48 | 0.09) 
21:36:36  :  H   3 :  I  23 :  P  60 : no_poller(): 0 -> rrd(*): 
storage_block_size:4096 - storage_block_count:15556272 - 
storage_used_blocks:6551434 (time P:0.08 | 118.25) 
21:36:36  :  H   3 :  I  23 :  P LPD : last_poll_date(): 1245008196 -> 
db(last_poll_date): 1 (time P:0.22 | 24.79) 
21:36:36  :  H   3 : Poller End, Total Time: 272.97 msec.


Running rrd_analyzer.php delivers the same faulty alarm here, too.
But I do not receive any alarm on normal way.

For testing purpose I then changed threshold in the VM-JFFNMS to 30%
Then I receive following alarm automatically as expected:

14 Jun   22:30:04                 SLA              Ubuntu2 NewZone              
 / Storage Used > 30%: 42.12 % (Unknown Customer FixedDisk 63718490112) 

I would say this is correct.





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