Tech
Adapter Specs
- Model: Front PERC (Battery Sold Separately)
- Drive Types: Gen3 (8 GT/s) NVMe, Gen4 (16 GT/s) NVMe, 12 Gb/s SAS, 6 Gb/s SAS/SATA, 3Gb/s SAS/SATA
- PCI Support: PCI-e 4.0
- SAS Connectors: 16 Port 2x8 Internal
- Cache Memory: 8GB NV
- Write Back Cache: Flash Backed Cache
- Max Drive Support: 16/controller, 50 with SAS Expander (Platform limit)
- RAID Levels: 0, 1, 5, 6, 10, 50, 60
- RAID Support: Hardware
Part Numbers:
- 9K2C2
- T4FH6
The Dell PERC 11 H755N (NVMe) Front RAID Controller delivers high-performance hardware RAID functionality for NVMe, SAS, and SATA drives. Designed for front-accessible configurations, it supports PCI-e 4.0 and provides robust storage connectivity with a 16 Port 2x8 internal architecture.
Equipped with 8GB of non-volatile cache and flash-backed protection, the H755N Front supports RAID levels 0, 1, 5, 6, 10, 50, and 60. It offers drive scalability up to 16 drives per controller, or up to 50 drives with a SAS expander, meeting the needs of high-performance modular server environments.
Summary of RAID levels
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.
Compatible With:
- Dell R650
- Dell R6525
- Dell R660
- Dell R660xs
- Dell R6615
- Dell R6625
- Dell R750
- Dell R750xa
- Dell R750xs
- Dell R7525
- Dell R760
- Dell R760xa
- Dell R760xs
- Dell R7615
- Dell R7625
- Dell R860
- Dell R960
- Dell T560
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Base Standard Capabilities
| Feature | PERC H755 adapter | PERC H755 front SAS | PERC H755N front NVMe | PERC H755 MX adapter | PERC H750 adapter SAS |
|---|---|---|---|---|---|
| RAID levels | 0, 1, 5, 6, 10, 50, 60 | 0, 1, 5, 6, 10, 50, 60 | 0, 1, 5, 6, 10, 50, 60 | 0, 1, 5, 6, 10, 50 ,60 | 0, 1, 5, 6, 10, 50 ,60 |
| Non–RAID | Yes | Yes | Yes | Yes | Yes |
| Enclosures per port | Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
| Processor | Broadcom RAID-on-chip, SAS3916 chipset | Broadcom RAID-on-chip, SAS3916 chipset | Broadcom RAID-on-chip, SAS3916 chipset | Broadcom RAID-on-chip, SAS3916 chipset | Broadcom RAID-on-chip, SAS3916 chipset |
| Battery backup unit | Yes | Yes | Yes | Yes | Yes |
| Local Key Management security | Yes | Yes | Yes | Yes | Yes |
| Controller queue depth | 5120 | 5120 | 5120 | 5120 | 5120 |
| Secure enterprise key manager security | Yes | Yes | Yes | No | Yes |
| Non-volatile cache | Yes | Yes | Yes | Yes | Yes |
| Cache memory | 8 GB DDR4 2666 MT/s cache | 8 GB DDR4 2666 MT/s cache | 8 GB DDR4 2666 MT/s cache | 8 GB DDR4 2666 MT/s cache | 8 GB DDR4 2666 MT/s cache |
| Cache function | Write back, write through, no read ahead, and read ahead | Write back, write through, no read ahead, and read ahead | Write back, write through, no read ahead, and read ahead | Write back, write through, no read ahead, and read ahead | Write back, write through, no read ahead, and read ahead |
| Max no of VDs in RAID mode | 240 | 240 | 240 | 240 | 240 |
| Max no of disk groups | 240 | 240 | 240 | 240 | 240 |
| Max no of VDs per disk group | 16 | 16 | 16 | 16 | 16 |
| Hot swap devices supported | Yes | Yes | Yes | Yes | Yes |
| Autoconfig | Yes | Yes | Yes | Yes | Yes |
| Hardware XOR engine | Yes | Yes | Yes | Yes | Yes |
| Online capacity expansion | Yes | Yes | Yes | Yes | Yes |
| Dedicated and global hot spare | Yes | Yes | Yes | Yes | Yes |
| Drives types | 3 Gbps SATA, 6 Gbps SATA/SAS, and 12 Gbps SAS, Gen3 (8 GT/s), and Gen4 (16 GT/s) NVMe | 3 Gbps SATA, 6 Gbps SATA/SAS, and 12 Gbps SAS | Gen3 (8 GT/s) and Gen4 (16 GT/s) NVMe | 3 Gbps SATA, 6 Gbps SATA/SAS, and 12 Gbps SAS, Gen3 (8 GT/s), and Gen4 (16 GT/s) NVMe | 3 Gbps SATA, 6 Gbps SATA/SAS, and 12 Gbps SAS |
| VD strip size | 64 KB, 128 KB, 256 KB, 512 KB, 1 MB | 64 KB, 128 KB, 256 KB, 512 KB, 1 MB | 64 KB, 128 KB, 256 KB, 512 KB, 1 MB | 64 KB, 128 KB, 256 KB, 512 KB, and 1 MB | 64 KB, 128 KB, 256 KB, 512 KB, 1 MB |
| PCIe support | Gen 4 | Gen 4 | Gen 4 | Gen 4 | Gen 4 |
| SAS/SATA maximum drive support |
|
| Not applicable | Limited by platform: 8 drives per controller |
|
| NVMe maximum drive support |
| Not applicable |
| Limited by platform:8 drives per controller | Not applicable |
Spec Sheet 4
| Model & Form Factors | Interface Support | PCI Support | SAS Connectors | Cache Memory | Write Back Cache | RAID Levels | Max Drive Support | RAID Support |
|---|---|---|---|---|---|---|---|---|
| H755N Front (NVMe Only) | Gen3 (8 GT/s) NVMe Gen4 (16 GT/s) NVMe |
PCIe Gen 4 | 2x8 Internal | 8GB NV | Flash Backed Cache | 0,1,5,6,10,50,60 | 8/per controller | Hardware |
| H755 Adapter FH | 3 Gbps SATA 6 Gbps SATA/SAS 12 Gbps SATA/SAS Gen3 (8 GT/s) NVMe Gen4 (16 GT/s) NVMe |
PCIe Gen 4 | 2x8 Internal | 8GB NV | Flash Backed Cache | 0, 1, 5, 6, 10, 50,60 | 16/controller 50 with SAS Expander *Platform limit |
Hardware RAID |
| H755 Adapter LP | ||||||||
| H755 Front (SAS/SATA Only) | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA |
PCIe Gen 4 | 2x8 Internal | 8GB NV | Flash Backed Cache | 0,1,5,6,10,50,60 | 16/controller 50 with SAS Expander *Platform limit |
Hardware RAID |
| H755 MX | 3 Gbps SATA 6 Gbps SATA/SAS 12 Gbps SATA/SAS Gen3 (8 GT/s) NVMe Gen4 (16 GT/s) NVMe |
PCIe Gen 4 | 1x8 Internal | 8GB NV DDR4 2666MT/s | Flash Backed Cache | 0, 1, 5, 6, 10, 50,60 | 8, Limited by platform | N/A |
| H750 Adapter FH | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA *SAS/SATA ONLY |
PCIe Gen 4 | 1x8 Internal | 8GB NV | Flash Backed Cache | 0,1,5,6,10,50,60 | 8/controller 50 with SAS Expander *Platform limit |
Hardware RAID |
| H750 Adapter LP | ||||||||
| H355i Adapter FH | 12Gb/s SAS 6Gb/s SATA |
PCIe Gen 4 | 2x8 Internal | No Cache | No Cache | 0,1,10 | Up To 32 RAID or 32 Non-RAID |
Hardware |
| H355i Adapter LP | ||||||||
| H355 Front | 12Gb/s SAS 6Gb/s SATA |
PCIe Gen 4 | 2x8 Internal | No Cache | No Cache | 0,1,10 | Up To 32 RAID >or 32 Non-RAID |
Hardware |
| HBA355 Front (internal) | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA |
PCIe Gen 4 | 2x8 Internal | N/A | N/A | N/A | 16/controller 50 with SAS Expander *Platform limit |
N/A |
| HBA355i Adapter FH | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA |
PCIe Gen 4 | 2x8 Internal | N/A | N/A | N/A | 16/controller 50 with SAS Expander *Platform limit |
N/A |
| HBA355i Adapter LP | ||||||||
| HBA355e Adapter FH | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA |
PCIe Gen 4 | 4x4 External | N/A | N/A | N/A | 240 | N/A |
| HBA355e Adapter LP | ||||||||
| H350 Adapter FH | 12Gb/s SAS 6Gb/s SATA |
PCIe Gen 4 | 1x8 Internal | No Cache | No Cache | 0,1,10 | Up To 32 RAID or 32 Non-RAID |
Hardware |
| H350 Adapter LP | ||||||||
| H350 Mini Mono | 12Gb/s SAS 6Gb/s SATA |
PCIe Gen 4 | 2x4 Internal | N/A | N/A | 0, 1, 10 | Without SAS Expander: 8 drives per controller With SAS Expander: Limited by platform offering |
N/A |
| HBA350i Adapter (internal) | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA |
PCIe Gen 4 | 2x8 Internal | N/A | N/A | N/A | 16/controller 50 with SAS Expander *Platform limit |
N/A |
| HBA350 MX (internal) | 12Gb/s SAS 6Gb/s SAS/SATA 3Gb/s SAS/SATA |
PCIe Gen 4 | 1x8 Internal | N/A | N/A | N/A | 8 *Platform limit |
N/A |