question in Oracle Linux and ASM drives

I added a new disk to a VM server running oracle linux
then i log in to the linux server and i did  echo "- - -" > /sys/class/scsi_host/host0/scan

oracleasm scandisks and i get

sd 0:0;10 assuming drive cace : write through   ( this is the new scsi lun  i added )

but i dont see my new drive

any help would be appreciated.
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Is it new or with partitions?
c_hocklandAuthor Commented:
no it is new
service rawdevices reload
ASM_DISKSTRING=/dev/raw/xxxxx sqlplus
alter diskgroup add

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