Controller Limitations; Technical Description - Lenovo ServeRAID M1115 User Manual

1.3.1

Controller Limitations

1.4

Technical Description

1-4
controller controls eight internal 6-Gb/s SAS/SATA ports through two
internal x4 mini SAS 4i (SFF-8087) connectors. The controller is
available with eight PHYs.
The ServeRAID M1115 SAS/SATA 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
M1115 SAS/SATA Controller,"
requirements, and
Conditions" for information about the minimum and the maximum
temperature ranges
The ServeRAID-M1115 controller brings 6.0 Gb/s Serial Attached SCSI
and 6.0 Gb/s Serial ATA performance to host controller, workstation, and
server designs. The controller supports internal storage devices, which
allows you to use a system that supports enterprise-class SAS drives,
and desktop-class SATA drives. The controller can connect to drives
directly. Simplified cabling between devices is an additional benefit.
The controller is based on the LSISAS2008 ROC device. This device is
compliant with the Fusion-MPT architecture and provides a PCI Express
x8 interface.
Overview
for information about the power
Section 3.3.5, "Operating and Non-operating