HP StorageWorks MSA 2.8 SAN Switch - Manual (Page 226)

Troubleshooting
226 Fabric OS Procedures Version 3.1.x/4.1.x User Guide
2. Disable the switch by entering switchdisable at the command line.
3. Enter portloopbacktest [passcount] to set all ports for parallel
loopback.
Refer to the HP StorageWorks Fabric OS Version 3.1.x/4.1.x Reference Guide
for detailed information about the optional operand.
4. Transmit frame F through port N.
5. Pick up the frame from the same port N.
6. Check the following statistic error counters for non-zero values:
ENC_in, CRC_err, TruncFrm, FrmTooLong, BadEOF, Enc_Out,
BadOrdSet, DiscC3
7. Check if the transmit, receive, or class 3 receiver counter are stuck at a value.
8. Check if the number of frames transmitted is not equal to the number of
frames received.
9. Repeat steps 3 through 7 for all ports present until:
— The number of frames (or passCount) requested is reached.
— All ports are marked as bad.
Possible Errors
One or more of the following errors may appear if failures are detected. Refer to
the HP StorageWorks Diagnostic and System Error Message Version 3.1.x/4.1.x
Reference Guide to find details and actions for any errors that appear.
DIAG-INIT
DIAG-PORTDIED
DIAG_XMIT
DIAG-TIMEOUT
DIAG_ERRSTAT
DIAG-STATS
DIAG-DATA