Hi,

Has anybody tried multipathing with SCSI on FCP ?

I tried to defined 2 path to the same WWPN/LUN with 2 differents devices numbers on 
the same linux and I get the following error :

Mar 27 07:59:04 sbe12127 kernel: Loaded 10178 symbols from 
/boot/System.map-2.4.21-83-default.
Mar 27 07:59:04 sbe12127 kernel: Symbols match kernel version 2.4.21.
Mar 27 07:59:04 sbe12127 kernel: Loaded 516 symbols from 18 modules.
Mar 27 07:59:04 sbe12127 kernel: scsi : 0 hosts left.
Mar 27 07:59:04 sbe12127 kernel: zfcp: zfcp_module_init: driver version 0x3009d
Mar 27 07:59:05 sbe12127 kernel: zfcp: FSF: zfcp_fsf_open_unit_handler: FSF_LUN_IN_USE
Mar 27 07:59:05 sbe12127 kernel: zfcp: FSF: zfcp_fsf_open_unit_handler: error: FCP_LUN 
0x0001000000000000 at the remote port with WWPN 0x500060e802c5d603 connected to the 
adapter with devno 0x0601 is already owned by another operating system instance (LPAR 
or VM guest)
Mar 27 07:59:05 sbe12127 kernel: zfcp: FSF: zfcp_fsf_open_unit_handler: Additional 
sense data is presented:
Mar 27 07:59:05 sbe12127 kernel: 00bb0f03 00000000 00000000 00000000
Mar 27 07:59:05 sbe12127 kernel: zfcp: ERP: zfcp_erp_unit_failed: Unit recovery failed 
on the unit with FCP_LUN 0x0001000000000000 connected to the port with WWPN 
0x500060e802c5d603 at the adapter with devno 0x0601.
Mar 27 07:59:05 sbe12127 kernel: scsi0 : zfcp
Mar 27 07:59:05 sbe12127 kernel: scsi1 : zfcp


here the scripts :

rmmod zfcp
modprobe qdio
modprobe scsi_mod
insmod zfcp map="\
0x601 0x01:0x500060e802c5d603 0x00:0x0001000000000000;\
0x603 0x02:0x500060e802c5d603 0x01:0x0001000000000000"
modprobe sd_mod
modprobe st

Thanks in advance,
Herve Bonvin


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