problem with increase volume disk iscsi

[alireza baghery]

hi
i have one redhat 5.9 and add on one disk scsi (fibre)
problem:
when we increase volume disk (from 100G to 500G) iscsi in (hp p2000) do not
see change on redhat
i execute echo "- - -">/sys/class/fc_host/host2/scan
and rescan-script-bus.sh
but یdoes not anythong change
how to solve problem
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