MD1000 automatic change from write back to write through???

Robin Bowes robin-lists at robinbowes.com
Thu Aug 12 19:01:46 CDT 2010


On 13/08/10 00:15, mcclnx mcc wrote:
> we have DELL R900 with two MD1000 connect to it.  The O.S. is Redhat 5.5 X86_64.  DELL OPMN version 6.1.
> 
> recently I saw /var/log/messages have messages:
> 
> Aug 12 03:05:14 ORA03 Server Administrator: Storage Service EventID: 2278  The controller battery charge level is below a normal threshold.:  Battery 0 Controller 0
> Aug 12 03:05:14 ORA03 Server Administrator: Storage Service EventID: 2188  The controller write policy has been changed to Write Through.:  Battery 0 Controller 0
> Aug 12 03:05:14 ORA03 Server Administrator: Storage Service EventID: 2199  The virtual disk cache policy has changed.:  Virtual Disk 0 (Virtual Disk 0) Controller 0 (PERC 6/E Adapter)
> Aug 12 03:05:15 ORA03 Server Administrator: Storage Service EventID: 2199  The virtual disk cache policy has changed.:  Virtual Disk 1 (Virtual Disk 1) Controller 0 (PERC 6/E Adapter)
> 
> I used OPMN to check and found disk cache policy change to "write" through".  I tried to use OPMN "change policy" to change it bcak to "write back".  I didn't get error but policy did NOT change.
> 
> anyone know why and how to change it back?

Probably this issue:

http://yo61.com/dell-drac-bbu-auto-learn-tests-kill-disk-performance.html

R.
-- 
"Feed that ego and you starve the soul" - Colonel J.D. Wilkes
http://www.theshackshakers.com/



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