Lenovo ServeRAID M5120, User Manual

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ServeRAID M5120 Controller Descriptions and Limitations 1-3
1.2 ServeRAID M5120 Controller Descriptions and
Limitations
The ServeRAID M5120 SAS/SATA controller is a PCI-Express 3.0, half-
size, half-height RAID controller based on the LSISAS2208 PCI Express-
SAS/SATA I/O Processor chip. The ServeRAID M5120 SAS/SATA
controller controls eight external 6-Gb/s SAS/SATA ports through two
SFF-8088 x4 external mini SAS connectors. The controller is available
with eight PHYs.
1.2.1 Controller Limitations
The ServeRAID-M5120 controller has the following limitations:
•
You can connect only one device per SAS PHY unless you use an
expander
•
You can use a maximum cable length of six feet (using shorter
cables is preferred)
•
Cables have to meet the SAS specification
•
You cannot mix SAS drives and SATA drives in the same virtual disk
•
You cannot mix SAS or SATA Solid State Drives (SSDs) and legacy
mechanical drives (SAS or SATA) in the same virtual disk
•
You cannot mix Solid State SAS drives and Solid State SATA drives
in the same virtual disk
•
See Section 3.3.4, “Power Supply Requirements for the ServeRAID
M5120 SAS/SATA Controller,” for information about the power
requirements, and Section 3.3.5, “Operating and Non-operating
Conditions” for information about the minimum and the maximum
temperature ranges