Private message from system

hi kwimmer,
i have some problem to log on bladesystem with run SUSE Linux Enterprise Server 11.

error:

[55330.240576] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 36 a4 84 c8 00 00 38 00
[55330.240581] end_request: I/O error, dev sda, sector 916751560
[55330.241056] sd 0:0:0:0: [sda] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
[55330.241059] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 36 a4 7e d8 00 00 10 00
[55330.241063] end_request: I/O error, dev sda, sector 916750040
[55330.241545] sd 0:0:0:0: [sda] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
[55330.241547] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 36 a4 84 48 00 00 38 00
[55330.241552] end_request: I/O error, dev sda, sector 916751432
[55330.243008] sd 0:0:0:0: [sda] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
[55330.243010] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 36 a4 86 88 00 00 38 00
[55330.243014] end_request: I/O error, dev sda, sector 916752008
[55382.609205] sd 1:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
[55382.609210] sd 1:0:0:0: [sdb] CDB: Read(10): 28 00 36 a4 74 a0 00 00 20 00
[55382.609217] end_request: I/O error, dev sdb, sector 916747424
[55382.609230] device-mapper: multipath: Failing path 8:16.

Please what means this error???