Buffer I/O Error in IBM storage 3500

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We have installed RHEL 6.3 in IBM Blade server, all the installation went well, after we assign the LUNs from IBM 3500 storage the server is taking long time to boot also fdisk -l command also taking more time to display the output. The below is the error message we are getting.

un 14 21:38:59 alysurprddbol02 kernel: end_request: I/O error, dev sdl, sector 56
Jun 14 21:38:59 bol02 kernel: end_request: I/O error, dev sdl, sector 0
Jun 14 21:38:59 bol02 kernel: end_request: I/O error, dev sdl, sector 0
Jun 14 21:38:59 bol02 kernel: end_request: I/O error, dev sdl, sector 0
Jun 14 21:38:59 bol02 kernel: end_request: I/O error, dev sdl, sector 0
Jun 14 21:38:59 bol02 kernel: end_request: I/O error, dev sdl, sector 0

"Buffer I/O error on device sdb, logical block 131071287"
....
"Buffer I/O error on device sdc, logical block 131073487"
....
end_request : I/O error, dev sdc, sector 8

Thanks and Regards

C. Rajesh

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Hi. Hopefully someone from the community here will be able to assist with this problem. I've added added some product and tag metadata to your post. Please remember to do this when you start a new discussion, it will make your post easier for other users to find and you'll get help faster.

Hello All,

Still the issue has not resolved. Please give ideas.

Thanks in advance

C. Rajesh

I would pursue two items.
1.) multipath configuration - make sure that /etc/multipath.conf
http://www.redbooks.ibm.com/redbooks.nsf/RedbookAbstracts/tips0836.html
Here is a "citrix" specific post - but it appears similar http://forums.citrix.com/thread.jspa?threadID=267018

2.) This suggestion would be more complex. Make sure that your initrd for your running kernel includes the driver and optimizations applied. I am not proficient creating a new initrd, but I believe you would look into "dracut".