HP XP7 Storage - Manual (Page 88)

6 Troubleshooting
This chapter provides troubleshooting and contact information for HP Technical Support.
General troubleshooting resources
For troubleshooting information on the HP XP7 Storage system, see the HP XP7 Owner Guide.
For troubleshooting information on the Remote Web Console software, see the HP XP7 Remote
Web Console User Guide.
For information on Remote Web Console error codes, see the HP XP7 Remote Web Console
Messages.
Troubleshooting Performance Monitor
Recommended action Error
While displaying Performance Monitor in short range, if I/O workloads between
hosts and the storage system become heavy, the storage system gives higher priority Part of monitoring data is
missing.
to I/O processing than monitoring processing. If you notice that monitoring data is
frequently missing, change to a longer collection interval.
If the time setting of the SVP is changed, the monitoring data might not be updated.
Set Monitoring Switch to Disable, and set Monitoring Switch to Enable again. The monitoring data is not
updated, even though
Monitoring Switch is set to
Enable.
The HBA for the WWN that is displayed in red is connected to two or more ports,
but the traffic between the HBA and some of the ports is not monitored by Performance The WWN of a host bus
adapter is displayed in red on
the WWN tab.
Monitor. When many-to-many connections are established between HBAs and ports,
make sure that all traffic between HBAs and ports is monitored. For details, see
“Monitoring all port-HBA traffic: many-to-many connections” (page 59) .
Troubleshooting Performance Control
Recommended action Error
The HBA for the WWN that is displayed in red is connected to two or more ports,
but the traffic between the HBA and some of the ports is not monitored by Performance The WWN of a host bus
adapter is displayed in red on
the WWN tab.
Monitor. When many-to-many connections are established between HBAs and ports,
make sure that all traffic between HBAs and ports is monitored. For details, see
“Monitoring all port-HBA traffic: many-to-many connections” (page 59) .
Troubleshooting Cache Residency
Recommended action Error
To avoid degradation of host response time, add and delete only one LDEV at a time.
If the host timeout period is set to 10 seconds or shorter, limit the total amount of data
in one operation to: The host I/O response time has
become degraded.
• 1 GB or less for open systems
•
1,000 cylinders or less for mainframe systems
88 Troubleshooting