Quick Specs Models: Front PERC Drive Types: 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 Number: LP: 51P7W FH: 29XMF fPERC: 3KDWX MX: XYHRD The Dell fPERC 11 H755 (SAS/SATA) RAID Controller delivers powerful hardware RAID functionality for front-accessible storage systems. Designed with PCI-e 4.0 support, it connects up to 16 drives directly and up to 50 drives with a SAS expander, offering exceptional scalability for enterprise deployments. Equipped with 8GB of non-volatile cache and flash-backed cache protection, the H755 Front PERC supports RAID levels 0, 1, 5, 6, 10, 50, and 60. It ensures high throughput and reliable storage performance for SAS and SATA drive environments in mission-critical server applications. 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.
