Solid State Drive Features; Solid State Drive Guard - Lenovo ThinkServer RD240 Software User's Manual

1.4

Solid State Drive Features

1.4.1

Solid State Drive Guard

1-4
•
Eliminates the master-slave construction used in parallel ATA
•
Allows addressing of multiple SATA II targets through an expander
•
Allows multiple initiators to address a single target (in a fail-over
configuration) through an expander
MegaRAID firmware supports SSD drives attached to MegaRAID SAS
controllers. These drives are expected to behave like SATA HDDs or SAS
HDDs. The major advantages of SSD drives include:
•
High random read speed (because there is no read-write head to
move)
•
High performance-to-power ratio, as these drives have very low
power consumption compared to HDDs
•
Low latency
•
High mechanical reliability
•
Lower weight and size (for low-capacity SSD drives)
The features and operations on SSD drives are the same as for hard disk
drives (HDD).
Note: MegaRAID implements support for only those SATA SSD
drives which support ATA-8 ACS compliance.
You can choose whether to allow a virtual drive to consist of both SSD
devices and HDDs. For a virtual drive that consists of SSDs only, you
can choose whether to allow SAS SSD drives and SATA SSD drives in
that virtual drive. For virtual drives that have both SSDs and HDDs, you
can choose whether to mix SAS and SATA HDD drives with SAS and
SATA SSD devices in various combinations.
Note: Support for SATA SDD drives applies only to those drives
that support ATA-8 ACS compliance.
SSDs are known for their reliability and performance. SSD Guard™, a
feature that is unique to MegaRAID, increases the reliability of SSDs by
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