The ThinkSystem RAID 940 family of PCIe 4.0 12 Gbps SAS RAID controllers are high-performance RAID-on-chip (ROC) adapters for connectivity to drives internal to the server. These adapters support RAID levels 0, 1, 10, 5, 50, 6 and 60, and include an extensive list of RAS and management features.

The RAID 940 Series adapters all have a PCIe 4.0 host interface which doubles the bandwidth between the server and the adapter, compared to the previous generation RAID 930 adapters. This improves overall performance of the storage subsystem by supporting up to 3 million IOPS (JBOD mode) and up to 3 million IOPS in RAID (random reads).

RAID on Chip-based controllers such as the RAID 940 adapters have a dedicated processor that offloads all RAID functions from the server's CPU. With hardware acceleration for RAID 5 and 6 operations plus up to 8 GB dedicated memory for caching, the 940-8i, 16i and 32i offer the ultimate performance for ThinkSystem servers.

Specification

Product
Product id	685831
Brand	Lenovo
Partnr	4Y37A09735
EAN/UPC code	889488525812
Ports & interfaces
Supported storage drive interfaces	SAS
Host interface	PCI Express x8
PCI Express slots version	4.0
Performance
RAID levels	0, 1, 5, 6, 10, 50, 60, JBOD
RAID Level Migration	Y
Data transfer rate	12 Gbit/s
SSD support	Y
Internal memory	8000 MB
Number of devices supported	16
Hot-swap	Y
Certification	USA (FCC 47 CFR part 15 Subpart B, class B) Canada (ICES -003, Class B) Taiwan (CNS 13438) Japan (VCCI V-3) Australia/New Zealand (AS/NZS CISPR 22) Korea (RRA no 2013-24 & 25) Europe (EN55022/EN55024) Safety: EN/ IEC/ UL 60950 RoHS WEEE
Compatible products	SR665 (7D2W/7D2V), SR645 (7D2Y/7D2X)
System requirements
Compatible operating systems	Microsoft Windows Server 2016 Microsoft Windows Server 2019 Red Hat Enterprise Linux 8.1 SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server 12 SP5 with Xen SUSE Linux Enterprise Server 15 SP1 SUSE Linux Enterprise Server 15 SP1 with Xen VMware vSphere Hypervisor (ESXi) 6.7 U3 VMware vSphere Hypervisor (ESXi) 7.0
Operational conditions
Operating temperature (T-T)	10 - 55 °C
Operating relative humidity (H-H)	20 - 80 procent
Storage relative humidity (H-H)	5 - 95 procent