IBM DS3000

7065FC_Config3.fm Draft Document for Review August 30, 2007 12:59 am
522 IBM System Storage DS3000: Introduction and Implementation Guide
21.9 Verify the installation
To enable communication across the secondary I/O path, we can either restart the host
server or run the mppBusRescan command.
Then run the following command:
ls -lR /proc/mpp
The output of this command is shown in Example 21-8.
Example 21-8 Both I/O paths are enabled
/proc/mpp:
total 0
dr-xr-xr-x 4 root root 0 Jun 20 17:23 DS3400_Thailand
/proc/mpp/DS3400_Thailand:
total 0
dr-xr-xr-x 3 root root 0 Jun 20 17:23 controllerA
dr-xr-xr-x 3 root root 0 Jun 20 17:23 controllerB
-rw-r--r-- 1 root root 0 Jun 20 17:23 virtualLun0
/proc/mpp/DS3400_Thailand/controllerA:
total 0
dr-xr-xr-x 2 root root 0 Jun 20 17:23 qla2xxx_h1c0t0
/proc/mpp/DS3400_Thailand/controllerA/qla2xxx_h1c0t0:
total 0
-rw-r--r-- 1 root root 0 Jun 20 17:23 LUN0
-rw-r--r-- 1 root root 0 Jun 20 17:23 UTM_LUN31
/proc/mpp/DS3400_Thailand/controllerB:
total 0
dr-xr-xr-x 2 root root 0 Jun 20 17:23 qla2xxx_h2c0t0
/proc/mpp/DS3400_Thailand/controllerB/qla2xxx_h2c0t0:
total 0
-rw-r--r-- 1 root root 0 Jun 20 17:23 LUN0
-rw-r--r-- 1 root root 0 Jun 20 17:23 UTM_LUN31
As you can see, and compared to Example 21-8 on page 522 the RDAC now works with both
controllers and manages both I/O paths. This completes the SAN boot configuration and
installation of Red Hat Enterprise Linux 4.