8202-E4B or 8205-E6B SAS dual-RAID subsystem with internal drives

This configuration uses dual-storage I/O adapter (IOA) mode or high availability (HA) RAID mode with internal disk drives.

This configuration increases availability using dual-storage IOA or high availability (HA) to connect multiple adapters to a common set of internal disk drives. It also increases the performance of RAID arrays. The following rules apply to this configuration:

• This configuration uses dual Cache RAID enablement cards.
• Using the RAID enablement cards with port expanders, the two embedded adapters can connect to each other and all eight disk drives.
• The disk drives are required to be in RAID arrays.
• There are no separate SAS cables required to connect the two embedded SAS RAID adapters to each other. The connection is contained within the backplane.
• RAID 0, 10, 5, and 6 support up to eight drives.
• Solid-state drives (SSD) and hard disk drives (HDD) can be used, but can never be mixed in the same RAID array. An SSD-only RAID set and an HDD-only RAID set is supported.
• SAS I/O attachment cable for optional connection to external storage.

Example: SAS dual-RAID subsystem with internal drives

This example provides an overview of the dual-storage I/O adapter (IOA) configuration using internal disk drives on the 8202-E4B or 8205-E6B system.

Figure 1. Disk bays controlled by both embedded SAS adapters when using SAS dual-RAID subsystem with internal drives

The following table lists the configuration details.

Table 1. Configuration details

Embedded SAS

Configuration details

RAID enablement card RAID/Cache storage controller Cache battery card

RAID enablement card (CCIN 2BE1) in tandem with separate cache battery card (CCIN 2BCF) creates a RAID adapter. The RAID controller card with cache battery card attached (CCIN 2BD9) provides another RAID adapter. The two SAS adapters connect to all eight disk drives. Physical connections to the SAS cable are enabled in order to attach to another SAS port expander in an external disk enclosure using a YI cable.