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SAS subsystem overview for the 8202-E4C, 8202-E4D, 8205-E6C, or 8205-E6D
Review the SAS subsystem features and locations for the 8202-E4C, 8202-E4D, 8205-E6C, or 8205-E6D system.
Use this information with your specific system unit and operating system documentation. General information is intended for all users of this product. Service information is intended for a service representative that is specifically trained on the system unit and subsystem being serviced.
Note: All SAS subsystem features for 8202-E4C, 8202-E4D, 8205-E6C,
or 8205-E6D systems
share the same integrated base system board (custom card identification
numbers (CCIN) 2B2C or 2B4A for the two-socket model and 2B2D or 2B4B
for the one-socket model). The physical location code for the base
system board is Un-P1.
Feature locations
Use Figure 1 and Table 1 to
review the features and locations of the SAS base subsystem.
Figure 1. SAS base subsystem overview
| Diagram location | Part name | CCINs | Physical location codes |
|---|---|---|---|
| A | Base backplane1 | 2B2C, 2B2D, 2B4A, or 2B4B | Un-P1 |
| B | Tape drive (optional)1 | NA | Un-P1-D1 (SAS connector)
or Un-P1-D2 (USB connector) Note: The tape drive
bay is the same for both.
|
| C | DVD drive1 | NA | Un-P2-D9 |
| D | Disk drive backplane | 2BD5 | Un-P2 |
| E | Disk drives (6 SFF drive disk bays, 2 closed "filler" bays) | NA | Un-P2-D1 - Un-P2-D6 |
| 1 Feature is part of the SAS subsystem but separate from feature code 5618. | |||
Use Figure 2 and Table 2 to
review the features and locations of the SAS subsystem with a two-way
split drive backplane.
Figure 2. SAS two-way
split drive backplane overview
| Diagram location | Part name | CCINs | Physical location codes |
|---|---|---|---|
| A | Base backplane1 | 2B2C, 2B2D, 2B4A, or 2B4B | Un-P1 |
| B | Tape drive (optional)1 | NA | Un-P1-D1 (SAS connector)
or Un-P1-D2 (USB connector) Note: The tape drive
bay is the same for both.
|
| C | DVD drive1 | NA | Un-P2-D9 |
| D | Disk drive backplane | 2BD5 | Un-P2 |
| E | Disk drives (JBOD, RAID-0, or RAID-10) | NA | Un-P2-D1 - Un-P2-D6 (Un-P2-D7 and Un-P2-D8 are closed bays, also called filler bays) |
| F | RAID-10 storage controller | 2B4F (feature code EJ02) | Un-P1-C19 |
| 1 Feature is part of the SAS subsystem but separate from feature code EJ02. | |||
Use Figure 3 and Table 3 to
review the features and locations of the SAS subsystem with dual-RAID
components.
Figure 3. SAS dual-RAID subsystem
overview
| Diagram location | Part name | CCINs | Physical location codes |
|---|---|---|---|
| A | Base backplane1 | 2B2C, 2B2D, 2B4A, or 2B4B | Un-P1 |
| B | Tape drive (optional)1 | NA | Un-P1-D1 (SAS connector)
or Un-P1-D2 (USB connector) Note: The tape drive
bay is the same for both.
|
| C | DVD drive1 | NA | Un-P2-D9 |
| D | 8-disk-drive dual storage IOA backplane with removable media | 2BD6 | Un-P2 |
| E, F | 8 SFF disk drives | NA | Un-P2-D1 - Un-P2-D8 |
| G | RAID/Cache storage controller | 2B4C | Un-P1-C19 |
| H | Cache battery card | 2BCF | Un-P1-C14 |
| I | SAS I/O attachment cable | Un-P2-T1 | |
| (not pictured) | Optional external SAS cables for storage
on integrated RAID1
|
||
| 1 Feature is part of the SAS subsystem but separate from feature code EJ01. | |||
Feature details
- SAS RAID adapters
- The SAS RAID adapters have the following features:
- A host PCI-x at 66 MHz.
- Physical link (phy) speed of 3 Gbps SAS supporting transfer rates of 300 MB per second
- Optimized for SAS disk configurations that use dual paths through dual expanders for redundancy and reliability
- Adapter managed path redundancy and path switching for multiport SAS devices
- Embedded PowerPC® RISC Processor, hardware XOR DMA Engine, and hardware Finite Field Multiplier (FFM) DMA Engine (for Redundant Array of Independent Disks (RAID) 6)
- Support for RAID 0 and 10 disk arrays
- RAID disk arrays supported as a boot device
- Advanced RAID features:
- Hot spares for RAID 10 disk arrays
- Background parity checking
- Background data scrubbing
- Disks that are formatted to 528 bytes per sector, providing cyclical redundancy checking (CRC) and logically bad block checking
- Optimized skip read/write disk support for transaction workloads
