Users Guide
Table Of Contents
- Dell Technologies PowerEdge RAID Controller 11 User’s Guide PERC H755 adapter, H755 front SAS, H755N front NVMe, and PERC H755 MX adapter
- Contents
- Dell Technologies PowerEdge RAID Controller 11
- Applications and User Interfaces supported by PERC 11
- Features of PowerEdge RAID Controller 11
- Controller features
- Virtual disk features
- Hard drive features
- Fault tolerance
- Install and remove a PERC 11 card
- Safety instructions
- Before working inside your system
- After working inside your system
- Remove the PERC H755 adapter
- Install the PERC H755 adapter
- Remove the PERC H755 front SAS card
- Install the PERC H755 front SAS card
- Remove the PERC H755N front NVMe card
- Install the PERC H755N front NVMe card
- Remove the PERC H755 MX adapter
- Install the PERC H755 MX adapter
- Driver support for PERC 11
- Firmware
- Manage PERC 11 controllers using HII configuration utility
- Enter the PERC 11 HII configuration utility
- Exit the PERC 11 HII configuration utility
- Navigate to Dell PERC 11 configuration utility
- View the HII Configuration utility dashboard
- Configuration management
- Controller management
- Clear controller events
- Save controller events
- Save debug log
- Enable security
- Disable security
- Change security settings
- Restore factory default settings
- Auto configure behavior
- Manage controller profile
- Advanced controller properties
- Virtual disk management
- Physical disk management
- Hardware components
- Security key management in HII configuration utility
- Security key and RAID management
- Security key implementation
- Local Key Management
- Create a security key
- Change Security Settings
- Disable security key
- Create a secured virtual disk
- Secure a non-RAID disk
- Secure a pre-existing virtual disk
- Import a secured non-RAID disk
- Import a secured virtual disk
- Dell Technologies OpenManage Secure Enterprise Key Manager
- Supported controllers for OpenManage Secure Enterprise Key Manager
- Manage enterprise key manager mode
- Disable enterprise key manager mode
- Manage virtual disks in enterprise key manager mode
- Manage non–RAID disks in enterprise key manager mode
- Migration of drives from local key management to enterprise key management
- Troubleshooting
- Single virtual disk performance or latency in hypervisor configurations
- Configured disks removed or not accessible error message
- Dirty cache data error message
- Discovery error message
- Drive Configuration Changes Error Message
- Windows operating system installation errors
- Firmware fault state error message
- Foreign configuration found error message
- Foreign configuration not found in HII error message
- Degraded state of virtual disks
- Memory errors
- Preserved Cache State
- Security key errors
- General issues
- Physical disk issues
- Physical disk in failed state
- Unable to rebuild a fault tolerant virtual disk
- Fatal error or data corruption reported
- Multiple disks are inaccessible
- Rebuilding data for a failed physical disk
- Virtual disk fails during rebuild using a global hot spare
- Dedicated hot spare disk fails during rebuild
- Redundant virtual disk fails during reconstruction
- Virtual disk fails rebuild using a dedicated hot spare
- Physical disk takes a long time to rebuild
- Drive removal and insertion in the same slot generates a foreign configuration event
- SMART errors
- Replace member errors
- Linux operating system errors
- Drive indicator codes
- HII error messages
- Appendix RAID description
- Getting help
- Documentation resources
Troubleshooting
To get help with your Dell Technologies PowerEdge RAID Controller 11 series, you can contact your Dell Technical Service
representative or see https://www.dell.com/support.
Topics:
• Single virtual disk performance or latency in hypervisor configurations
• Configured disks removed or not accessible error message
• Dirty cache data error message
• Discovery error message
• Drive Configuration Changes Error Message
• Windows operating system installation errors
• Firmware fault state error message
• Foreign configuration found error message
• Foreign configuration not found in HII error message
• Degraded state of virtual disks
• Memory errors
• Preserved Cache State
• Security key errors
• General issues
• Physical disk issues
• SMART errors
• Replace member errors
• Linux operating system errors
• Drive indicator codes
• HII error messages
Single virtual disk performance or latency in
hypervisor configurations
Multi-initiator or hypervisor configurations running multiple I/O workloads to a single raid array may experience degraded
performance or latency. This is caused by upper layers sending separate I/O workloads for each virtual machine to the storage
subsystem which ends up being a random I/O workload to the under lying RAID array. For I/O workload configurations that
require lower latency restrictions and higher I/O performance it may be beneficial to run fewer I/O workloads to individual
RAID arrays or to use separate RAID arrays and physical disks for each I/O workload. Other considerations are making sure
write-back, read ahead cache is enabled for rotational disks or using solid state drives (SSDs) to improve random I/O workload
performance.
Performance degradation may also be observed when background operations such as initialization, consistency check, or
reconstructions are running on the virtual disk. See your hypervisor storage best practices or performance best practices guides
for additional configuration support.
Configured disks removed or not accessible error
message
Error Message:
Some configured disks have been removed from your system or are no longer
accessible. Check your cables and ensure all disks are present. Press any
key or ’C’ to continue.
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Troubleshooting 69