- Notes, cautions, and warnings
- Dell Technologies PowerEdge RAID Controller 12
- Applications and User Interfaces supported by PERC 12
- Features of PowerEdge RAID Controller 12
- Controller features
- Hardware Root of Trust
- Security Protocol and Data Model (SPDM)
- Device enumeration
- UEFI Secure Boot
- Auto-Configure Behavior (Execute Once)
- Auto-Configure Behavior (Primary and Secondary settings)
- Disk roaming
- Hardware Accelerated I/O
- Non–RAID disks
- Physical disk power management
- Firmware update
- Snapdump
- Physical disk coercion
- PERC H965e support for PowerVault MD24XX enclosure
- Virtual disk features
- Virtual disk initialization
- Background operations
- Drive features
- Fault tolerance
- Controller features
- Install and remove a PERC 12 card
- Driver support for PERC H965i Adapter, PERC H965i Front, PERC H965i MX, and PERC H965e Adapter
- Manage the PERC 12 firmware
- Manage PERC 12 controllers using HII Configuration Utility
- Enter the PERC 12 HII Configuration Utility
- Exit the PERC 12 HII Configuration Utility
- Navigate to the PERC 12 Configuration Utility
- View the HII Configuration Utility dashboard
- Configuration management
- Controller management
- Virtual disk management
- Device 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 (SEKM)
- Supported controllers for OpenManage Secure Enterprise Key Manager (SEKM)
- Manage the Server Enterprise Key Manager (SEKM) feature
- Disable the Secure Enterprise Key Manager (SEKM) feature
- Manage virtual disks in the SEKM mode
- Manage non–RAID disks in the SEKM mode
- Transition of drives from Local Key Management to Secure Enterprise Key Management
- Troubleshooting issues in PERC 12 series cards
- Single virtual disk performance or latency in hypervisor configurations
- Unable to discover or detect a PERC card
- Unable to install the Microsoft Windows operating system
- An incorrect firmware state is detected
- Foreign configuration not found in HII
- Degraded state of virtual disks
- Boot-time errors
- Event log errors
- Application issues
- 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
- An NVMe drive is indicated as faulty when moving the drive to new backplane using hot-insertion
- 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
- 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
Dell PowerEdge RAID Controller 12 User’s Guide PERC H965i Adapter, PERC H965i Front, PERC H965i MX, and PERC H965e Adapter
Summary of RAID levels
Following is a list of the RAID levels supported by the PERC 12 series of cards:
- RAID 0 uses disk striping to provide high data throughput, especially for large files in an environment that requires no data redundancy.
- RAID 1 uses disk mirroring so that data written to one physical disk is simultaneously written to another physical disk. RAID 1 is good for small databases or other applications that require small capacity and complete data redundancy.
- RAID 5 uses disk striping and parity data across all physical disks (distributed parity) to provide high data throughput and data redundancy, especially for small random access.
- RAID 6 is an extension of RAID 5 and uses an additional parity block. RAID 6 uses block-level striping with two parity blocks distributed across all member disks. RAID 6 provides protection against double disk failures, and failures while a single disk is rebuilding. If you are using only one array, deploying RAID 6 is more effective than deploying a hot spare disk.
- RAID 10 is a combination of RAID 0 and RAID 1, uses disk striping across mirrored disks. It provides high data throughput and complete data redundancy.
- RAID 50 is a combination of RAID 0 and RAID 5 where a RAID 0 array is striped across RAID 5 elements. RAID 50 requires at least six disks.
- RAID 60 is a combination of RAID 0 and RAID 6 where a RAID 0 array is striped across RAID 6 elements. RAID 60 requires at least eight disks.
The following table lists the minimum and maximum disks supported on each RAID levels.
| RAID Level | Minimum disk | Maximum disk |
|---|---|---|
| 0 | 1 | 32 |
| 1 | 2 | 2 |
| 5 | 3 | 32 |
| 6 | 4 | 32 |
| 10 | 4 | 240 |
| 50 | 6 | 240 |
| 60 | 8 | 240 |
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