SAS subsystem overview
Learn about the features and locations of the SAS subsystem parts in the 5148-21L, 5148-22L, 8247-21L, 8247-22L, 8247-42L, 8284-21A, 8284-22A, 8286-41A, or 8286-42A system.
Use this information in conjunction with your specific system and operating system documentation.
Feature locations for the SAS subsystem parts in the base function storage configuration systems
Use Table 1 with Figure 1 for a list of parts and their locations.
| Diagram location | Part name | Feature code (FC) | Customer card identification numbers (CCINs) | Physical location codes |
|---|---|---|---|---|
| A | PCIe3 x8 SAS RAID internal adapter 6 Gb |
EJ0S for 8247-42L, 8286-41A, or 8286-42A systems EJ0V for 8284-21A and 8284-22A systems EL3V for 8247-21L and 8247-22L systems |
57D7 | P1-C14, P1-C15 |
| B, C | Base function disk drive backplane with 12 SFF bays | EJ0N for 8247-42L, 8286-41A, or 8286-42A
systems EJ0T for the 8284-21A and 8284-22A systems EL3T for 5148-21L, 8247-21L, and 8247-22L systems |
2B09 | P2 for base function disk drive backplane P2-D1 through P2-D12 for diskbays |
| D | One Slimline DVD bay | 5771 | P2-D27 for systems that are 4U high P2-D15 for systems that are 2U high |
Feature locations for the SAS subsystem parts in the base function storage configuration with the split disk configuration
Use Table 2 with Figure 2 for a list of parts and their locations.
| Diagram location | Part name | Feature code (FC) | Customer card identification numbers (CCINs) | Physical location codes |
|---|---|---|---|---|
| A | PCIe3 x8 SAS RAID internal adapter 6 Gb (quantity 2) | EJ0S for 8247-42L, 8286-41A, or 8286-42A systems
EJ0V for 8284-21A and 8284-22A systems EL3V for 8247-21L and 8247-22L systems |
57D7 | P1-C14, P1-C15 |
| B, C1, C2 | Base function disk drive backplane with 12 SFF bays split into two groups of 6 disk bays (C1, C2) | EJ0N for 8247-42L, 8286-41A, or 8286-42A
systems EJ0T for 8284-21A and 8284-22A systems EL3T for 8247-21L and 8247-22L systems |
2B09 | P2 for base function disk drive backplane P2-D1 through P2-D12 for diskbays |
| D | One Slimline DVD bay | 5771 | P2-D27 for systems that are 4U high P2-D15 for systems that are 2U high |
Feature locations for the SAS subsystem parts in the expanded function storage configuration
Use Figure 3 with Table 3 for a list of parts and their locations.
| Diagram location | Part name | Feature code (FC) | Customer card identification numbers (CCINs) | Physical location codes |
|---|---|---|---|---|
| A | PCIe3 x8 cache SAS RAID internal adapter 6 Gb (quantity 2) |
EJ0P for 8247-42L, 8286-41A, or 8286-42A systems EJ0U for 8284-21A and 8284-22A systems EL3U for 8247-21L and 8247-22L systems |
57D8 | P1-C14, P1-C15 |
| B, C | Expanded function disk drive backplane which
supports one of the following options:
|
EL3W for 5148-22L server EJ0P for the 8247-42L, 8286-41A, or 8286-42A systems EJ0U for 8284-21A and 8284-22A system EL3U for the 8247-21L and 8247-22L systems |
2B0F for the 8247-42L, 8286-41A, or 8286-42A
systems 2B5A for the 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A systems |
P2 for expanded function disk drive backplane P2-D1 through P2-D8 for diskbays in 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A systems P2-D1 through P2-D9 and P2-D18 through P2-D26 for SSDs in 8247-42L, 8286-41A, or 8286-42A systems P2-D9 through P2-D14 for expanded function disk drive backplane |
| E | SSD bays | P2-D9 through P2-D14 in 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A systems P2-D10 through P2-D17 in 8247-42L, 8286-41A, or 8286-42A systems |
||
| D | One Slimline DVD bay | 5771 | P2-D27 for 8247-42L, 8286-41A, or 8286-42A systems P2-D15 for 5148-22L, 8247-21L, 8247-22L, 8284-21A, or 8284-22A systems |
|
| F | External SAS port cable assembly | |||
| G | Backup power module cards (one for each SAS RAID internal adapter) | P1-C14-C1 and P1-C15-C2 |
- SAS RAID adapters
- The SAS RAID adapters have the following features:
- PCI Express (PCIe3) system interface
- Physical link (phy) speed of 6 Gbps SAS
- Optimized for SAS disk configurations that use dual paths through dual expanders for redundancy and reliability
- Adapter managed path redundancy and path switching for multiported SAS devices
- Embedded PowerPC processor, hardware XOR DMA Engine, and hardware Finite Field Multiplier (FFM) DMA Engine (for Redundant Array of Independent Disks (RAID))
- Support for RAID 0, 5, 6, and 10 disk arrays
- Additional features when the PCIe3 x8 cache SAS RAID internal adapter 6 Gb card is
installed:
- Adapters support nonvolatile write cache
- Support for RAID 5T2, 6T2, and 10T2 tiered disk arrays (depending on the Operating System support)
- Adapters configured in dual storage IOA or high availability (HA) RAID mode for best reliability and availability
- RAID disk arrays supported as a boot device
- Advanced RAID features:
- Hot spares for RAID 5, 6, 10, 5T2, 6T2, and 10T2 disk arrays
- Background parity checking
- Background data scrubbing
- Disks formatted to 528 bytes per sector, providing cyclical redundancy checking (CRC) and logically bad block checking (T10 Data Integrity Fields)
- Optimized hardware for RAID 5 and 6 sequential write workloads
- Optimized skip read/write disk support for transaction workloads
