IBM System Storage DS3500 Introduction And Implementation Manual page 637

Draft Document for Review March 28, 2011 12:24 pm
Example 20-3 Directory structure created by RDAC multipath driver
/proc/mpp/DS3524-FC/controllerA/mptsas_h0c0t2/LUN0
/proc/mpp/DS3524-FC/controllerA/mptsas_h0c0t1/LUN0
/proc/mpp/DS3524-FC/controllerB/mptsas_h0c0t3/LUN0
/proc/mpp/DS3524-FC/controllerB/mptsas_h0c0t0/LUN0
Example 20-4 LUN0 file content
Linux MPP driver. Version:09.03.0C05.0331 Build:Wed Apr 14 11:37:55 CDT 2010
Lun WWN:60080e50001b0c9e00000f694c60d855
Physical HBA driver: mptsas
Device Scsi Address: host_no:0 channel:0 target:0 Lun:0
Queue Depth = 64
I/O Statistics:
Device state: [0] OPTIMAL
Device state: [1] OPTIMAL
Device state: [2] OPTIMAL
Device state: [3] OPTIMAL
Device state: [4] OPTIMAL
Device state: [5] OPTIMAL
Device state: [6] OPTIMAL
Device state: [7] OPTIMAL
Device state: [8] OPTIMAL
Device state: [9] OPTIMAL
Path state:[9] OPTIMAL
Path state:[0] OPTIMAL
Path state:[1] OPTIMAL_NEED_CHECK
Path state:[2] OPTIMAL_CHECKING
Path state:[3] OPTIMAL
Path state:[4] OPTIMAL_NEED_CHECK
Path state:[5] OPTIMAL_CHECKING
Path state:[6] OPTIMAL
Path state:[7] OPTIMAL_NEED_CHECK
Path state:[8] OPTIMAL_CHECKING
Controller Failed? 0
Outstanding IOs on this device:
total size:1136
The WWN lun shown in Example 20-4, (in this case 60080e50001b0c9e00000f694c60d855),
should be listed in the output of ls /dev/disk/by-id as shown in Example 20-5. The word scsi-3
before the lun number is the SCSI standard.
Example 20-5 ls /dev/disk/by-id output
drwxr-xr-x 2 root root 180 Aug 12 07:08 .
drwxr-xr-x 5 root root 100 Aug 12 07:07 ..
lrwxrwxrwx 1 root root
lrwxrwxrwx 1 root root 10 Aug 12 07:08 edd-int13_dev80-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Aug 12 07:08 edd-int13_dev80-part2 -> ../../sda2
Number of IOs:0
Longest trip of all I/Os:0
Shortest trip of all I/Os:0
Number of occurences of IO failed events:0
9 Aug 12 07:08 edd-int13_dev80 -> ../../sda
Chapter 20. SuSE Linux configuration guide
Linux Config.fm
613