Troubleshooting procedures help you diagnose problems.
Best practices for troubleshooting
Taking advantage of certain configuration options, and ensuring vital system access information has been recorded, makes the process of troubleshooting easier.
Battery operation for the control enclosure Lenovo Storage V7000 node canisters cache volume data and hold state information in volatile memory. Battery operations differ, depending on the generation of your control enclosure model.
Understanding the medium errors and bad blocks
A storage system returns a medium error response to a host when it is unable to successfully read a block. The Lenovo Storage V7000 response to a host read follows this behavior.
RAID write response time This feature means that the RAID software layer, where redundancy exists to do so, can prevent drive bad behavior from having an unlimited impact on I/O performance. In addition, the system tries to avoid immediately committing to an array rebuild due to a brief offline event from a single drive, while there is full redundancy.
Lenovo Storage V7000 user interfaces for servicing your system
The Lenovo Storage V7000 provides a number of user interfaces to troubleshoot, recover, or maintain your system. The interfaces provide various sets of facilities to help resolve situations that you might encounter.
Event reporting
Events that are detected are saved in an event log. As soon as an entry is made in this event log, the condition is analyzed. If any service activity is required, a notification is sent, if you have set up notifications.
Resolving a problem
Described here are some procedures to help resolve fault conditions that might exist on your system and which assume a basic understanding of the Lenovo Storage V7000 system concepts.
Resolving a problem with SSL certificates
If you are unable to connect to the management GUI from your web browser and received a Certificate expired or similar error, this information might help you resolve the issue.
Resolving a problem with SSL/TLS clients
Changing the security level of the system might cause the web interface, CIM clients, and other SSL/TLS clients to stop working. If any clients stop working, complete the following procedure.
Resolving a problem with offloaded data transfer
When Microsoft offloaded data transfer (ODX) is enabled on a system, it is possible to encounter problems. These procedures help you address some common issues that might arise.
iSCSI performance analysis and tuning
This procedure provides a solution for Internet Small Computer Systems Interface (iSCSI) host performance problems while connected to a Lenovo Storage V7000 system and its connectivity to the network switch.
Fibre Channel link failures When a failure occurs on a single Fibre Channel link, the small form-factor pluggable (SFP) transceiver might need to be replaced.
Ethernet iSCSI host-link problems
If you are having problems attaching to the Ethernet hosts, your problem might be related to the network, the Lenovo Storage V7000 system, or the host.
Recover system procedure The recover system procedure recovers the entire storage system if the system state is lost from all control enclosure node canisters.The procedure re-creates the storage system by using saved configuration data.The saved configuration data is in the active quorum disk and the latest XML configuration backup file. The recovery might not be able to restore all volume data. This procedure is also known as Tier 3 (T3) recovery.
Lenovo Storage V7000 replaceable units
Each Lenovo Storage® V7000 model consists of several replaceable units. Generic replaceable units are cables, SFP transceivers, canisters, power supply units, battery assemblies, and enclosure chassis. The parts list varies, depending on the generation of your control enclosure model.
Replacing parts You can remove and replace customer-replaceable units (CRUs) in control enclosures or expansion enclosures.