Lenovo Flex System Storage Expansion Node

The System Expansion Node has the following features:
Connects directly to supported compute nodes via a PCIe 3.0 interface to the compute node's interposer connector (also known as the ETE connector)
Support for 12 hot-swap 2.5-inch drives, accessible via a sliding tray
Support for 6 Gbps SAS and SATA drives, both HDDs and SSDs
Based on an LSI SAS2208 6 Gbps RAID on Chip (ROC) controller
Optional 512 MB or 1 GB cache with cache-to-flash super capacitor off-load
Supports RAID 0, 1, 10 as standard. JBOD also supported. Optional RAID 5, 50 with cache upgrade. (Note: The original RAID 6, 60 upgrade option is withdrawn from marketing)
Includes an expansion shelf to physically support the Storage Expansion Node and its compute node attached together
Internal and external light path diagnostics
Optional support for SSD performance acceleration with Features on Demand upgrade
Support for up to 64 virtual drives, up to 128 drive groups, up to 16 virtual drives per one drive group, and up to 32 physical drives per one drive group
Support for logical unit number (LUN) sizes up to 64 TB
Configurable stripe size up to 1 MB
Compliant with Disk Data Format (DDF) configuration on disk (COD)
S.M.A.R.T. support
Managed through the IMMv2 management processor on the compute node and with the MegaRAID Storage Manager management software

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