SCSI disk adding error on Redhat EL 3

[a bv]

Hi,

I tried to add a  SCSI disk on a HP Redhat EL 3 while the system is
running and also tried t also reboot then. Both times I got the error
at /var/log/messages given below also cant see any new disk on fdisk
So what can be the problem?

Regards

Apr 10 15:56:56 intsrva kernel: SCSI Error: (0:0:0) Status=02h (CHECK CONDITION)
Apr 10 15:56:56 intsrva kernel:  Key=6h (UNIT ATTENTION); FRU=00h
Apr 10 15:56:56 intsrva kernel:  ASC/ASCQ=29h/02h "SCSI BUS RESET OCCURRED"
Apr 10 15:56:56 intsrva kernel:  CDB: 2A 00 04 1B 12 D9 00 00 08 00
Apr 10 15:56:56 intsrva kernel:
Apr 10 15:56:59 intsrva kernel: SCSI Error: (0:1:0) Status=02h (CHECK CONDITION)
Apr 10 15:56:59 intsrva kernel:  Key=6h (UNIT ATTENTION); FRU=00h
Apr 10 15:56:59 intsrva kernel:  ASC/ASCQ=29h/02h "SCSI BUS RESET OCCURRED"
Apr 10 15:56:59 intsrva kernel:  CDB: 2A 00 00 00 80 FF 00 00 08 00
Apr 10 15:56:59 intsrva kernel: