The ThinkSystem RAID 5350-8i adapter is an entry-level 12 Gb SAS/SATA internal RAID adapter manufactured by Lenovo that offers a cost-effective RAID solution for small to medium business customers.
This cacheless adapter supports RAID levels 0/1/10/5, and include support for Lenovo management tools.

The ThinkSystem RAID 5350 Series internal RAID adapters have the following specifications:

  • PCIe 3.0 x8 host interface
  • Two adapter form factors:
    • Low-profile PCIe adapter with broad server compatibility
    • Custom form factor (CFF), designed to not consume a standard PCIe slot
  • 12 Gbps SAS/SATA RAID controller, based on the Microsemi Adaptec SmartHBA 2100-8i
  • Cacheless (not upgradeable)
  • Connectivity for up to 8 internal SAS or SATA drives,
  • Support for intermixing SAS and SATA HDDs and SSDs. Mixing SAS and SATA drives in the same array is not supported. Mixing of HDDs and SSDs in the same array is not supported.
  • Support for intermixing of 24 Gb/s, 12 Gb/s, and 6 Gb/s drives; 24 Gb/s drives operate at 12 Gb/s
  • Support for RAID 0, 1, 10, and 5
  • Support for JBOD (non-RAID, known as “raw” or “HBA mode” in Adaptec parlance) drive state
  • Support for up to 64 arrays and 64 logical drives (virtual drives)
  • Support for logical drive sizes greater than 2 TB.
  • Configurable stripe size from 16 KB up to 1 MB
  • Hot spares—global, dedicated, and pooled
  • Automatic/manual rebuild of hot spares
  • Supports 512e, 512n and 4K sector formatted drives
  • S.M.A.R.T. support
  • Performance of up to 1.7M random read IOPS with extremely low-latency 4 KB I/Os