IBM Midrange System DS4000 Series Hardware Manual page 484

Type the following command to verify the RDAC/MPP driver version:
# mppUtil -V
The Linux multipath driver version displays, as shown in Example 7-14.
Example 7-14 mppUtil -V
[root@TC-2008 ~]# mppUtil -V
Linux MPP Driver Version: 09.03.0C05.0214
Type the following command to verify that the devices are configured with the RDAC
driver:
# ls -1R /proc/mpp
The output similar to the one shown in Example 7-15 displays:
Example 7-15 ls -1R /proc/mpp
/proc/mpp:
total 0
dr-xr-xr-x 4 root root 0 Oct 24 02:56 DS5020-sys1
crwxrwxrwx 1 root root 254, 0 Oct 24 02:56 mppVBusNode
/proc/mpp/ DS5020-sys1:
total 0
dr-xr-xr-x 3 root root 0 Oct 24 02:56 controllerA
dr-xr-xr-x 3 root root 0 Oct 24 02:56 controllerB
-rw-r--r-- 1 root root 0 Oct 24 02:56 virtualLun0
/proc/mpp/ DS5020-sys1/controllerA:
total 0
dr-xr-xr-x 2 root root 0 Oct 24 02:56 lpfc_h6c0t2
/proc/mpp/ DS5020-sys1/controllerA/lpfc_h6c0t2:
total 0
-rw-r--r-- 1 root root 0 Oct 24 02:56 LUN0
/proc/mpp/ DS5020-sys1/controllerB:
total 0
dr-xr-xr-x 2 root root 0 Oct 24 02:56 lpfc_h5c0t0
/proc/mpp/ DS5020-sys1/controllerB/lpfc_h5c0t0:
total 0
-rw-r--r-- 1 root root 0 Oct 24 02:56 LUN0
After you install the RDAC driver, the following commands and man pages are available:
mppUtil
mppBusRescan
mppUpdate
RDAC
HBA parameters in Linux
The 2.6.11 Linux kernel introduced certain changes to the lpfc (Emulex driver) and qla2xxx
(Qlogic driver) Fibre Channel Host Bus Adapter (HBA) drivers; these changes removed the
following entries from the proc pseudo-file system:
/proc/scsi/qla2xxx
/proc/scsi/lpfc
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IBM Midrange System Storage Hardware Guide