Linux RHEL 5.3 connect to HSG80

[tar_py]

Hi, I tried to connect Linux Server to HSG80 SAN, I set the connection to SUN and asing lun only to the linux server, I can see de disk and lun in my linux but I can't to fdisk, when I tried to write the partition I see this error's in my messages file:

kernel: sdg: Unit Not Ready, error = 0x18
kernel: SCSI device sdg: 1433047240 byte hdwr sectors (733720 MB)
kernel: scsi2 (0,0,5) : reservation conflict
kernel: sdg: asking for cache data failed
kernel: sdg: assuming drive cache: write through
kernel: sdg: sdg1 sdg2 sdg3 sdg7 sdg8
kernel: scsi2 (0,0,5) : reservation conflict