HP StorageWorks Scalable File Share - Manual (Page 160)

Verifying, diagnosing, and maintaining the system 6–30
6.1.8.3 Examining the Quadrics adapter and interconnect link
This section describes how to identify and isolate problems on the Quadrics interconnect. The procedures
described in this section apply only to the portion of the interconnect that connects the server in the HP SFS
system to the switch infrastructure of the Quadrics interconnect. Specifically, diagnosing problems with links
within or between switches is not covered in this manual. It is assumed that switch monitoring and use of the
Pandora graphical diagnostic tool (from Quadrics, Ltd.) is performed by and on the client system to which
the HP SFS system is connected.
Read this section in conjunction with the diagnostics manual of the client system (if one is provided). For
example, for an HP XC system, the diagnostics are described in the HP XC System Software Administration
Guide.
To verify that the Quadrics interconnect is working correctly, perform the following procedures:
1. Test for the presence of the Quadrics interconnect adapter (see Section 6.1.8.3.1).
2. Run the
qselantest
diagnostics (see Section 6.1.8.3.2).
6.1.8.3.1 Testing for presence of Quadrics adapter
You can test for the presence of a Quadrics adapter by logging in to the server to be tested and entering
the following command on the server:
# cat /proc/qsnet/ep/rail0/state
running NodeId=40 NumNodes=128
If the output shows that the
/proc/qsnet/elan4/device0
does not exist, either there is no Quadrics
adapter in the server or the device driver failed to load. You can check for error messages from the Quadrics
driver in the log that is output from the
show log
command. Enter the commands shown in the following
example, where the server to be tested is
south3
:
# sfsmgr
.
.
.
sfs> show log data contains "qsnet" && server=south3-adm
6.1.8.3.2 Running the qselantest diagnostics
NOTE: The
qselantest
diagnostics support only QM500 PCI-X network adapters (equipped with the
Quadrics Elan4 network processor). If you try to run the
qselantest
diagnostics on QM400 network
adapters (equipped with the Quadrics Elan3 network processor) you will encounter the following error:
qselantest: No QsNet2 devices present
Run the
qselantest
diagnostics as follows:
• On the administration server and the MDS server, the
qselantest
diagnostics are installed locally.
To run the diagnostics on the administration or MDS server, log in to the server to be tested and enter
the following command:
# /usr/bin/qselantest
See Section 6.1.8.3.3 for an example of output from a
qselantest
test that detected no errors.
• The
qselantest
diagnostics are not installed locally on Object Storage Servers. If the server you
are testing is an Object Storage Server, you must run the administration server’s copy of the
qselantest
diagnostics over the network. To do this, you must use NFS to temporarily export the
administration server drive. Note that this is an exceptional case—using NFS on an Object Storage
Server is not generally supported, as it may seriously interfere with Lustre operation.