Resolving a problem
Described here are some procedures to help resolve fault conditions that might exist on your system.
- Resolving a problem with accessing the management GUI
If you are unable to connect to the management GUI from your web browser and received a Page not found or similar error, this information might help you resolve the issue. - 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. - Debugging and performance-monitoring statistics for offloaded data transfer
Offloaded data transfer (ODX) infrastructure captures debug and monitoring information for specific ODX modules and makes it available in global and local views. - Resolving a problem with the SAN Volume Controller boot drives
Complete the following steps to resolve most problems with SAN Volume Controller boot drives. - Resolving a problem with Microsoft Windows disk manager
Microsoft Windows disk manager might hang if the host attempts to write to a LUN that is a remote copy secondary volume on a system. This procedure addresses this issue. - Procedure: Shutting down a HyperSwap site
You can shut down one site in a HyperSwap® topology system without it causing hosts to lose access to the HyperSwap volumes, if there is an up-to-date copy of each HyperSwap volume on the site that remains online. - Procedure: Making drives support protection information
You can use this procedure to migrate drives and arrays to pick up support for protection information. - Resolving a problem with failure to boot
Light path LEDs might indicate a hardware failure on SAN Volume Controller 2145-DH8 . SAN Volume Controller 2145-SV1 does not have light path LEDs, but it does have some diagnostic LEDs.Diagnostic LEDs might indicate a hardware failure on a SAN Volume Controller 2145-SV1 . - Determining the failing enclosure or disk controller by using the CLI
You can use the command-line interface (CLI) to determine the failing enclosure or disk controller. - Resolving a problem with new expansion enclosures
Determine why a newly installed expansion enclosure was not detected by the system. - Diagnosing and resolving problems with fix procedures
You can use fix procedures to diagnose and resolve problems with the system. - 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 system response to a host read follows this behavior. - Resolving insufficient memory with a distributed array
If the creation of a distributed array fails due to a lack of memory, complete the following procedure to resolve the insufficient memory. - 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. - Using the maintenance analysis procedures
The maintenance analysis procedures (MAPs) inform you how to analyze a failure that occurs with a SAN Volume Controller node. - iSCSI performance analysis and tuning
This procedure provides a solution for Internet Small Computer Systems Interface (iSCSI) host performance problems while connected to a system and its connectivity to the network switch. - Debugging iSCSI backend sessions
Complete the steps in the following procedures to debug iSCSI backend sessions. - Procedure: SAN problem determination
You can solve problems on the system and its connection to the storage area network (SAN). - Optical link failures
You might need to replace the small form-factor pluggable (SFP) transceiver when a failure occurs on a single Fibre Channel or 10G Ethernet link (applicable to Fibre Channel over Ethernet personality enabled 10G Ethernet link). - Ethernet iSCSI host-link problems
If you are having problems attaching to the Ethernet hosts, your problem might be related to the network, the system, or the host. - Fibre Channel over Ethernet host-link problems
Problems attaching to the Fibre Channel over Ethernet (FCoE) hosts might be related to the network, the system, or the host. - 25 Gbps Ethernet link failures
When a failure occurs on a single 25 Gbps Ethernet link, the OM3 cable or the small form-factor pluggable 28 (SFP28) transceiver might need to be replaced. - Disaster recovery
Use these disaster recovery solutions for HyperSwap, Metro Mirror, Global Mirror, and Stretched System, where access to storage is still possible after the failure of a site.
Parent topic: Troubleshooting