My Bladeserver is attached to IBM DS4700 disk storage, After installing the RDAC Multipathing driver,The device is detecting as /dev/sdf instead of /dev/sdb, And in the dmesg is throwing the following erorrs.

end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sde, sector 2097024
end_request: I/O error, dev sde, sector 2097024
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097088
end_request: I/O error, dev sde, sector 2097136
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
end_request: I/O error, dev sde, sector 0
floppy0: no floppy controllers found
Floppy drive(s): fd0 is 1.44M
floppy0: no floppy controllers found
lp: driver loaded but no devices found
NET: Registered protocol family 10
lo: Disabled Privacy Extensions
IPv6 over IPv4 tunneling driver
ACPI: Power Button (FF) [PWRF]
ibm_acpi: ec object not found
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.11.5-ioctl (2007-12-12) initialised: dm-devel@redhat.com
device-mapper: multipath: version 1.0.5 loaded
end_request: I/O error, dev sdb, sector 2097144
printk: 159 messages suppressed.
Buffer I/O error on device sdb, logical block 262143
end_request: I/O error, dev sdb, sector 2097144
Buffer I/O error on device sdb, logical block 262143
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2096888
end_request: I/O error, dev sdb, sector 2096888
end_request: I/O error, dev sdb, sector 8
end_request: I/O error, dev sdb, sector 8
end_request: I/O error, dev sdb, sector 2097136
end_request: I/O error, dev sdb, sector 2097136
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097088
end_request: I/O error, dev sdb, sector 2097088
end_request: I/O error, dev sdb, sector 2096896
end_request: I/O error, dev sdb, sector 2096896
end_request: I/O error, dev sdb, sector 2096896
end_request: I/O error, dev sdb, sector 2096896
end_request: I/O error, dev sdb, sector 2097136
end_request: I/O error, dev sdb, sector 2097136
end_request: I/O error, dev sdb, sector 2096752
end_request: I/O error, dev sdb, sector 2096752
end_request: I/O error, dev sdb, sector 2096416
end_request: I/O error, dev sdb, sector 2096416
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdb, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2096888
end_request: I/O error, dev sdc, sector 2096888
end_request: I/O error, dev sdc, sector 8
end_request: I/O error, dev sdc, sector 8
end_request: I/O error, dev sdc, sector 2097136
end_request: I/O error, dev sdc, sector 2097136
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097088
end_request: I/O error, dev sdc, sector 2097088
end_request: I/O error, dev sdc, sector 2096896
end_request: I/O error, dev sdc, sector 2096896
end_request: I/O error, dev sdc, sector 2096896
end_request: I/O error, dev sdc, sector 2096896
end_request: I/O error, dev sdc, sector 2097136
end_request: I/O error, dev sdc, sector 2097136
end_request: I/O error, dev sdc, sector 2096752
end_request: I/O error, dev sdc, sector 2096752
end_request: I/O error, dev sdc, sector 2096416
end_request: I/O error, dev sdc, sector 2096416
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdc, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2096888
end_request: I/O error, dev sdd, sector 2096888
end_request: I/O error, dev sdd, sector 8
end_request: I/O error, dev sdd, sector 8
end_request: I/O error, dev sdd, sector 2097136
end_request: I/O error, dev sdd, sector 2097136
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097088
end_request: I/O error, dev sdd, sector 2097088
end_request: I/O error, dev sdd, sector 2096896
end_request: I/O error, dev sdd, sector 2096896
end_request: I/O error, dev sdd, sector 2096896
end_request: I/O error, dev sdd, sector 2096896
end_request: I/O error, dev sdd, sector 2097136
end_request: I/O error, dev sdd, sector 2097136
end_request: I/O error, dev sdd, sector 2096752
end_request: I/O error, dev sdd, sector 2096752
end_request: I/O error, dev sdd, sector 2096416
end_request: I/O error, dev sdd, sector 2096416
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sdd, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2096888
end_request: I/O error, dev sde, sector 2096888
end_request: I/O error, dev sde, sector 8
end_request: I/O error, dev sde, sector 8
end_request: I/O error, dev sde, sector 2097136
end_request: I/O error, dev sde, sector 2097136
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097088
end_request: I/O error, dev sde, sector 2097088
end_request: I/O error, dev sde, sector 2096896
end_request: I/O error, dev sde, sector 2096896
end_request: I/O error, dev sde, sector 2096896
end_request: I/O error, dev sde, sector 2096896
end_request: I/O error, dev sde, sector 2097136
end_request: I/O error, dev sde, sector 2097136
end_request: I/O error, dev sde, sector 2096752
end_request: I/O error, dev sde, sector 2096752
end_request: I/O error, dev sde, sector 2096416
end_request: I/O error, dev sde, sector 2096416
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sde, sector 2097144
end_request: I/O error, dev sdb, sector 0
end_request: I/O error, dev sdc, sector 0
end_request: I/O error, dev sdd, sector 0



We have tried to reinstall the rdac driver and we have tried reinstalling the OS also, But it results in the same thing and while booting into the OS it is giving the below error,pls find the attachment of the screenshot.

when we remove the Fibre expansion card or removing the fiber card will not throw any error while booting.


can anyone help....

Attached Thumbnails