Lenovo ServeRAID M5110, User Manual, Page: 18 / 72

ServeRAID M5110 Controller Description and Limitations 1-3
The LSISAS2208 ROC device provides the maximum benefits of a RAID
system and enables you to configure the system to satisfy your system
requirements.
The LSISAS2208 ROC device increases system performance and
provides fault-tolerant data storage. The LSISAS2208 supports data
striping across multiple disks, which reduces disk access time because
multiple disks simultaneously read or write data. In addtion, the
LSISAS2208 ROC device backs up data with either data mirroring or a
parity block. Either backup method enables you to recover lost data in
the event of a disk failure. You can select the data backup method that
best suits your needs. A hardware RAID assist exclusive-OR (XOR)
engine speeds parity generation and checking and reduces system-
access times.
The controller supports the SAS protocol as described in the Serial
Attached SCSI Standard , version 2.0 , and the SATA III protocol defined
by the Serial ATA Revision 3.0 Specification .
Note: You cannot mix SAS drives and SATA drives within the
same
virtual drive(s) .
Each port on the controller supports SAS devices and/or SATA devices
using the following:
•
SAS Serial SCSI Protocol (SSP), which enables communication with
other SAS devices
•
SATA, which enables communication with other SATA 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 device through an attached expander