Lenovo ThinkServer RD330 MegaRAID SAS Software User Guide - Page 15
Solid State Drive Features
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MegaRAID SAS Software User Guide Chapter 1: Overview | Solid State Drive Features Provides a serial, point-to-point storage interface Simplifies cabling between devices 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 1.4 Solid State Drive Features The MegaRAID firmware supports CacheCade - SSD Caching software drives attached to MegaRAID SAS controllers. These drives are expected to behave like SATA HDDs or SAS HDDs. The major advantages of CacheCade - SSD Caching software 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 CacheCade - SSD Caching software drives) The features and operations on CacheCade - SSD Caching software drives are the same as for hard disk drives (HDD). NOTE: MegaRAID implements support for only those SATA CacheCade - SSD Caching software drives which support ATA-8 ACS compliance. You can choose whether to allow a virtual drive to consist of both CacheCade - SSD Caching software devices and HDDs. For a virtual drive that consists of CacheCade - SSD Caching software only, you can choose whether to allow SAS CacheCade - SSD Caching software drives and SATA CacheCade - SSD Caching software drives in that virtual drive. For virtual drives that have both CacheCade - SSD Caching software and HDDs, you can choose whether to mix SAS and SATA HDD drives with SAS and SATA CacheCade - SSD Caching software devices in various combinations.l NOTE: Support for SATA SDD drives applies only to those drives that support ATA-8 ACS compliance. 1.4.1 Solid State Drive Guard CacheCade - SSD Caching software is known for its reliability and performance. CacheCade - SSD Caching software Guard™, a feature that is unique to MegaRAID, increases the reliability of CacheCade - SSD Caching software by automatically copying data from a drive with potential to fail to a designated hot spare or newly inserted drive. Because CacheCade - SSD Caching software are very reliable, non-redundant RAID 0 configurations are much more common than in the past. CacheCade - SSD Caching software Guard offers added data protection for RAID 0 configurations. Page 15