Lenovo ServeRAID M5110, Руководство пользователя

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1-4 Overview
1.2.1 Controller Limitations
The ServeRAID M5110 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 drive
•
You cannot mix SAS Solid State Drives (SSDs) or SATA SSDs and
legacy mechanical drives (SAS or SATA) in the same virtual drive
•
You cannot mix Solid State SAS drives and Solid State SATA drives
in the same virtual drive
See Section 3.3.4, “Power Supply Requirements for the ServeRAID
M5110 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.
1.3 Integrated MegaRAID Mode and MegaRAID Mode
You can run this ServeRAID SAS/SATA controller in either
integrated MegaRAID (iMR) mode or in MegaRAID (MR) mode.
Integrated MegaRAID is a highly integrated, low-cost RAID solution
made possible by Fusion-MPT™ architecture. Integrated MegaRAID is a
processor-based, hardware RAID solution designed for system
environments requiring redundancy and high availability where a full-
featured RAID implementation is not desired or might be cost prohibitive.
The major advantage of Integrated MegaRAID is that iMR provides RAID
at the processor level, so it does not burden the CPU, which allows for
more efficient operation.
The major advantage of MegaRAID mode is that the MR mode supports
more RAID levels than iMR mode. iMR mode supports RAID levels 0, 1,
5, 10, and 50. MR mode supports RAID levels 0, 1, 5, 6, 10, 50, and 60.