I/O pegged, need help diagnosing why

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we have server 2003 r2 sp2 server keeps getting pegged i/o every day around same time. 
http://i.imgur.com/ra9wj.png

for life of me can figure out why.  here's relevant proc explorer info:

 

top i/o:  http://i.imgur.com/ijfrw.png

 

process , stack:  http://i.imgur.com/bzrnu.png

 

any appreciated!

check link 

http://blogs.technet.com/b/yongrhee/archive/2009/10/12/troubleshooting-slow-disk-i-o-on-windows-server-2003.aspx

http://www.arabitpro.com



Windows Server  >  Windows Server General Forum



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