Lenovo System x3750 M4 Product Manual page 12

Internal storage
The server can support up to 16x 2.5-inch drives using the supported SAS/SATA backplane configurations.
The server supports 2.5-inch hot-swap SAS or hot-swap SATA hard disk drives, or 2.5-inch hot-swap SATA
solid-state drives. You can mix drives in the same server if you do not mix drives on the same array.
1.8-inch drive support: The use of 1.8-inch solid-state drives is now withdrawn from marketing.
Backplanes
The x3750 M4 server supports various internal storage configurations based on four different backplanes:
4-drive backplane for 2.5-inch drives: Up to four backplanes can be installed, each requiring one
SAS connection to a supported controller. One RAID controller can connect to two of these
backplanes.
8-drive backplane for 2.5-inch drives: Up to two backplanes can be installed, each requiring two
SAS connections. One RAID controller per backplane.
8-drive backplane with a SAS expander for 2.5-inch drives: Use with the other 2.5-inch drive
backplanes (8-drive or one 4-drive or two 4-drive backplanes) which will result in being able to
connect up to 16 2.5-inch drive bays to the one RAID controller.
Every four drives uses a SAS signal cable except when the 8-drive backplane with SAS expander is used.
When the 8-drive backplane with SAS expander is used, the other backplanes connect to the SAS
expander backplane with the supplied cables and then the SAS expander backplane is connected to the
single RAID controller with two cables. All backplane options include the necessary cables.
See the System x3750 M4 Installation and Service Guide for a description of all supported backplane
combinations.
Standard models (all models except A2x) ship with at least one backplane; see the
section for details. The following table shows the backplane options that are available for a x3750 M4
server.
Table 6. Internal storage expansion options
Part number Feature
code
00D2020 A4XA
00D2022 A4XC
00D2011 A4XD
* When a server is ordered via CTO, only one 4-drive backplane can be selected. If the order has more than
4 drive bays, 8-drive backplanes will be selected instead.
** Only one backplane with SAS expander (00D2011) can be installed in a server and can be used
connected to a single 8-drive backplane (00D2022), a single 4-drive backplane (00D2020), or two 4-drive
backplanes (00D2020).
Lenovo System x3750 M4 (8753)
Name
4x 2.5" HS SAS/SATA/SSD HDD Backplane
8x 2.5" HS SAS/SATA/SSD HDD Backplane
8x 2.5" HS SAS/SATA/SSD HDD Backplane
with controller expansion (SAS expander)
Standard models
Maximum
supported
4*
2
1**
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