storage - Re-scan LUN on Linux -


we have expend existing lun size on emc storage , want re-scan on host side don't know how figure out scsi id of specific lun. new storage.. doing don't know whether right way or not 

pseudo name=emcpowerj clariion id=apm00112500570 [oracle_cluster] logical device id=200601602e002900b6bca114c9f8e011 [lun01] state=alive; policy=claropt; priority=0; queued-ios=0; owner: default=sp a, current=sp       array failover mode: 1 ============================================================================== --------------- host ---------------   - stor -   -- i/o path --  -- stats --- ###  hw path               i/o paths    interf.   mode    state   q-ios errors ==============================================================================    2 qla2xxx                  sdaj      sp a1     active  alive       0      1    2 qla2xxx                  sdaw      sp b1     active  alive       0      4    1 qla2xxx                  sdj       sp a0     active  alive       0      1    1 qla2xxx                  sdw       sp b0     active  alive       0      4

here running find command on sdx device find out scsi id can echo 1 > /sys/bus/scsi/drivers/x:x:x:x/rescan re-scan lun

$ find /sys/devices -name "*block*" | grep -e "sdaj" -e "sdaw" -e "sdj" -e "sdw" /sys/devices/pci0000:00/0000:00:09.0/0000:05:00.1/host2/rport-2:0-1/target2:0:1/**2:0:1:8**/block:sdaw /sys/devices/pci0000:00/0000:00:09.0/0000:05:00.1/host2/rport-2:0-0/target2:0:0/**2:0:0:8**/block:sdaj /sys/devices/pci0000:00/0000:00:09.0/0000:05:00.0/host1/rport-1:0-1/target1:0:1/**1:0:1:8**/block:sdw /sys/devices/pci0000:00/0000:00:09.0/0000:05:00.0/host1/rport-1:0-0/target1:0:0/**1:0:0:8**/block:sdj

or there alternative or other way scan lun?

i use "lsscsi" program, available distribution.

% lsscsi [0:0:0:0]    cd/dvd  necvmwar vmware ide cdr00 1.00  /dev/sr0 [2:0:0:0]    disk    vmware,  vmware virtual s 1.0   /dev/sda [2:0:1:0]    disk    vmware,  vmware virtual s 1.0   /dev/sdb

as rescanning bus, that's pretty it.


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