IBM Redbooks ServeRAID-MR10M, Руководство пользователя

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ServeRAID-MR10M SAS/SATA Controller Description 1-3
1.2 ServeRAID-MR10M SAS/SATA Controller Description
The ServeRAID-MR10M controller is available with eight PHYs. The
controller has one LSISAS1078 ROC (RAID-on-chip) processor that
controls eight external SAS/SATA ports through two x4 SAS external
connectors.
1.2.1 Controller Limitations
The ServeRAID-MR10M 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 Drives and Solid State SATA Drives in
the same virtual disk
•
See Section 3.3.4, “Power Supply Requirements for the ServeRAID-
MR10M Controller,” for information about the power requirements,
and Section 3.3.5, “Operating and Non-operating Conditions” for
information about the minimum temperatures and the maximum
temperatures.
1.3 General Description
The ServeRAID-MR10M controller brings 3.0 Gbit/s Serial Attached
SCSI and 3.0 Gbit/s Serial ATA II performance to host adapter,
workstation, and server designs. The controller supports external storage
devices, which allows you to use a system that supports enterprise-class
SAS drives, and desktop-class SATA II drives. Each ServeRAID-MR10M
controller can connect to drives directly. Simplified cabling between
devices is an additional benefit.