Table 13. Feature comparison
Feature
ServeRAID M5210
N2215
NVMe
Extender
Adapter type
RAID controller
SAS HBA
PCIe Extender
Part number
46C9110
47C8675
00ML997
Form factor
PCIe low profile
PCIe low profile
PCIe low profile
Controller chip
LSI SAS3108
LSI SAS3008
None
Host interface
PCIe 3.0 x8
PCIe 3.0 x8
PCIe 3.0 x8
Port interface
12 Gbps SAS
12 Gbps SAS
PCIe NVMe
Number of ports
8
8
2
Port connectors
2x Mini-SAS HD x4
(SFF-8643)
2x Mini-SAS HD
x4
(SFF-8643)
OCuLink
Drive interface
SAS, SATA
SAS, SATA
NVMe
Drive type
HDD, SSD, SED
HDD, SSD
SSD
Hot-swap drives
Yes
Yes
Yes
Max devices
240
1024
2
RAID levels
0/1/10; Optional 5/50
(RAID 5 FoD, 47C8708, or cache
upgrades)
Optional 6/60 (47C8706)
None
None
JBOD mode
Yes (without cache)
Yes
Yes
Cache
1 GB no backup (47C8656)
1 GB flash backup (47C8660)
2 GB flash backup (47C8664)
4 GB flash backup (47C8668)
None
None
CacheVault cache protection
Optional
None
None
Performance Accelerator
(FastPath)
Optional (47C8710)
No
No
SSD Caching (CacheCade Pro
2.0)
Optional (47C8712)
No
No
SED support (SafeStore)
Yes (with RAID 5 FoD upgrade
or any cache upgrade
No
No
For more information, see the list of Lenovo Press Product Guides in the RAID adapters category:
https://lenovopress.com/servers/options/raid
The NVMe PCIe SSD Extender Adapter is a PCIe adapter that simply routes the PCIe 3.0 x8 signal from
the slot in the Storage Book, splits the signal to two x4 links, and routes those via cables to the drive
backplane. The extender adapter is shown in the following figure.
One adapter is required for every two drives installed in the Storage Book. Since there are only two PCIe
slots in the Compute Book, only two adapters can be installed and therefore only four NVMe drives can be
installed in a Storage Book.
Lenovo System x3850 X6 (6241)
25
