NEC Storage M100 Series User Manual page 400

User Guide
2. Check the PathManager status
Check /proc/scsi/sps/ddX, where X is a, b, c, ... (number of logical disks assigned to
server).
The path-info: line exists only for multiplexed sections of each device, and if NML appears in all
of the status columns of device-info:, paths are normally multiplexed.
Display example: When two logical disks are assigned to a server, with two access paths per
logical disk.
# cat /proc/scsi/sps/dda
device:/dev/dda
disk-info:NEC,DISK ARRAY,xxxxxxxxxxxxxxxx,xxxxx
device-info:Host:scsi:2 Channel:0 Id:0 Lun:0 Watch:Enable Status:NML
LoadBalance:D2
path-info:0 Host:scsi:0 Channel:0 Id:0 Lun:0 Priority:1 Status:ACT
path-info:1 Host:scsi:1 Channel:0 Id:0 Lun:0 Priority:2 Status:HOT
#
3. Check the path patrol daemon
Confirm that the path patrol daemon is operating. When the path patrol daemon is started, the
following message is displayed.
# /etc/rc.d/init.d/dd_daemon status
dd_daemon (pid XXX) is running ...
#
Release 6.0
Appendix F How to Set/Check Application Server (Linux) (iSCSI)
If nothing is shown, none of the access paths recognized the logical disks
of the disk array unit assigned to the application server. Check the
connection between the application server and the disk array unit, the
Access Control settings, NIC driver settings and so on.
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