Lenovo ThinkSystem SN850 Руководство по эксплуатации - Страница 19
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If memory rank sparing is used, then a minimum of one quad-rank DIMM or two single-rank or dual-rank
DIMMs must be installed per populated channel (the DIMMs do not need to be identical). In rank sparing
mode, one rank of a DIMM in each populated channel is reserved as spare memory. The largest rank in
the channel will be automatically selected as the spare rank. The amount of memory available to the
operating system depends on the number, capacity and rank counts of the DIMMs installed.
Internal storage
The SN850 server has four 2.5-inch hot-swap drive bays that are accessible from the front of the blade
server (see
Figure
2). Depending on server configuration and installed backplanes, these bays connect to
either the integrated 6 Gbps SATA controller, optional Lenovo RAID controllers or directly to PCIe lanes for
NVMe drives.
In addition, the SN850 can also support one or two M.2 form factor SSD drives on a separate adapter. The
following table lists the supported M.2 adapters (enablement kits). For more information, see the
ThinkSystem M.2 Drives and M.2 Adapters product guide:
m2-drives-adapters
Virtualization support: The integrated SATA controller can be used with virtualization hypervisors,
including VMware ESXi, Linux KVM, Xen, and Microsoft Hyper-V. However, support is limited to AHCI
(non-RAID) mode. RSTe mode is not supported with virtualization hypervisors.
Storage backplane kits, RAID and M.2 upgrades are listed below.
Table 15. Internal storage upgrades
Part number Feature
code
7M17A03930 AVEA
7M17A03931 AVEB
7M17A03933 AVED
7M17A03932 AVEC
7Y37A01092 AUMU
7Y37A01093 AUMV
Supported drives are listed in the
Controllers for Internal Storage
In addition to the optional M.2 RAID-1 enabled adapter, the SN850 supports 3 different RAID controllers as
shown in the table below.
Lenovo ThinkSystem SN850 Server
Name and description
ThinkSystem SATA Backplane kit for SN850
(includes 2 backplanes)
ThinkSystem NVMe/SATA Backplane Kit for SN850
(includes 2 backplanes)
ThinkSystem RAID 930-4i-2GB 4 Drive Adapter Kit for SN850
(includes RAID adapter, 2 backplanes and interposer)
ThinkSystem RAID 530-4i 4 Drive Adapter Kit for SN850
(includes RAID adapter, 2 backplanes and interposer)
ThinkSystem M.2 Enablement Kit
ThinkSystem M.2 with Mirroring Enablement Kit
Internal drive options
https://lenovopress.com/lp0769-thinksystem-
section.
Drive types
Maximum
supported
supported
4x SATA
1
4x NVMe or
1
4x SATA or
combination
4x SATA or
1
4x SAS or
combination
4x SATA or
1
4x SAS or
combination
1x M.2
1
2x M.2
1
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