ServeRAID M5014/M5015 Controllers Descriptions and Limitations 1-3
(SATA II) protocol defined by the Serial ATA Specification, Version 1.0a,
and the Serial ATA II; Extension to the Serial ATA Specification,
Version 1.1. SATA II is an extension to SATA 1.0a.
Each port on the controllers supports SAS devices and/or SATA II
devices using the following:
•
SAS Serial SCSI Protocol (SSP), which enables communication with
other SAS devices
•
SATA II, which enables communication with other SATA II devices
•
Serial Management Protocol (SMP), which communicates topology
management information directly with an attached SAS expander
device
•
Serial Tunneling Protocol (STP), which enables communication with
a SATA II device through an attached expander
1.2 ServeRAID M5014/M5015 Controllers Descriptions and
Limitations
The ServeRAID M5014 and ServeRAID M5015 controllers are available
with eight PHYs. The controllers have one LSISAS2108 ROC (RAID-on-
chip) processor that controls eight internal SAS/SATA ports through two
x4 SAS internal connectors.
1.2.1 Controller Limitations
The ServeRAID M5014 and ServeRAID M5015 controllers have 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
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