Is it possible that you forgot to ICKDSF format your paging areas? You
can get all kinds of strange errors when the paging areas are not
initialized to zeroed 4k blocks.
 
 
 
Best regards,
Pieter Harder
 
[EMAIL PROTECTED] 
tel  +31-73-6837133 / +31-6-47272537

>>> Jose Raul Baron <[EMAIL PROTECTED]> 01/04/08 1:28 >>>

Hi, list. We are experiencing some problems with unpredictable and so
far
inevitable system shutdowns for aparently unknown reasons. 

- We are running 4 SLES9 Linux images under z/VM 5.2
- If we keep only 3 images, this problem doesn't seem to appear. It
has
happened only with 4 images running at once. 
- OPERATOR 191 console registers suddenly (but it can be like this for
HOURS) the following message: 

        xx:yy:zz HCPPAW415E Six continuous paging errors have occurred
on
DASD 02D5 volume 520PG1. 
        (this message appears some 25-30 times per second)

- Disk 2D5 has been hardware-checked successfully, so it has no
hardware
errors. 
- Latest RSU has been applied by IBM-advise. This is our level: 

      q cplevel                                                
      z/VM Version 5 Release 2.0, service level 0702 (64-bit)  
      Generated at 12/21/07 19:33:42 MAI                       
      IPL at 01/04/08 11:46:43 MAI                             

      Ready;                                                   
      q cmslevel                                               
      CMS Level 22, Service Level 702                          
      Ready;                                                   

- These were some system indicators at the time of the latest shutdown:


PROCESSOR
=========
                                                                   
AVGPROC-009% 01                                                    
MDC READS-000000/SEC WRITES-000000/SEC HIT RATIO-000%              
PAGING-2/SEC STEAL-000%                                            
Q0-00001(00000)                           DORMANT-00018            
Q1-00000(00000)           E1-00000(00000)                          
Q2-00000(00000) EXPAN-001 E2-00000(00000)                          
Q3-00004(00000) EXPAN-001 E3-00000(00000)                          
PROC 0000-009%                                                     
LIMITED-00000                                                      
                                                                   
PAGE AREAS
==========
                EXTENT     EXTENT  TOTAL  PAGES   HIGH    %        
VOLID  RDEV      START        END  PAGES IN USE   PAGE USED        
------ ---- ---------- ---------- ------ ------ ------ ----        
520PAG 033F          1       3338 600840  30602  31676   5%      
520PG1 02D5          0       3338 601020  11660  11835   1%   
                                  ------ ------        ----   
SUMMARY                            1174K  42262          3%      
USABLE                             1174K  42262          3%      
                                                                 
SPOOL AREA
==========
                EXTENT     EXTENT  TOTAL  PAGES   HIGH    %      
VOLID  RDEV      START        END  PAGES IN USE   PAGE USED      
------ ---- ---------- ---------- ------ ------ ------ ----      
520SPL 0315          1       3338 600840 118407 160305  19%      
                                  ------ ------        ----      
SUMMARY                           600840 118407         19%      
USABLE                            600840 118407         19%      
* * * End of File * * *                                          

- So it shows neither PAGE nor SPOOL bottleneck. CPU values are also
acceptably low. 
- We have 8 GB total RAM in this LPAR.
- Our Linux RAM definitions are: 

USER LINUX1 LINUX1 3G    3G     BG        
USER LINUX2 LINUX2 2560M 2560M  BG       
USER LINUX3 LINUX3 2560M 2560M  BG        
USER LINUX4 LINUX4 256M  256M   BG        

- Aparently no great usage of system resources was being done at the
time of
shutdown (see above). 

Any help will be extremely welcome !!

Saludos, Best Regards,
José R. Barón
Dpto. Sistemas
CALCULO S. A.
Tel. 91 330 86 44
e-mail: [EMAIL PROTECTED] 
Do not print this e-mail unless necessary

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