12Gb/s MegaRAID® Tri-Mode Software User Guide Version 1.4 February 16, 2018 MR-TM-SW-UG105 12Gb/s MegaRAID Tri-Mode Software User Guide February 16, 2018 For a comprehensive list of changes to this document, see the Revision History Corporate Headquarters Website San Jose, CA www.broadcom.com Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, MegaRAID, CacheCade, SSD Guard, SafeStore, and the A logo are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries and/or the EU. Data subject to change. Copyright © 2016–2018 Broadcom. All Rights Reserved. The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries. For more information, please visit www.broadcom.com. Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. However, Broadcom does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. Broadcom - 1 - 12Gb/s MegaRAID Tri-Mode Software User Guide Table of Contents February 16, 2018 Table of Contents Chapter 1: Overview . 9 1.1 SAS Technology . 9 1.2 Serial-Attached SCSI Device Interface . 10 1.3 Serial ATA III Features . 10 1.4 Solid State Drive Features . 10 1.4.1 SSD Guard . 11 1.5 Dimmer Switch Features . 11 1.6 UEFI 2.0 Support . 11 1.7 Configuration Scenarios . 11 1.7.1 Valid Drive Mix Configurations with HDDs and SSDs . 13 1.8 Technical Support . 14 Chapter 2: Introduction to RAID . 15 2.1 Components and Features . 15 2.1.1 Drive Group . 15 2.1.2 Virtual Drive . 15 2.1.3 Fault Tolerance . 16 2.1.3.1 Multipathing . 16 2.1.4 Consistency Check . 17 2.1.5 Replace . 17 2.1.6 Background Initialization . 18 2.1.7 Profile Management . 18 2.1.8 Patrol Read . 18 2.1.9 Disk Striping . 19 2.1.10 Disk Mirroring . 19 2.1.11 Parity . 20 2.1.12 Disk Spanning . 20 2.1.13 Hot Spares . 21 2.1.14 Disk Rebuilds . 22 2.1.15 Rebuild Rate . 23 2.1.16 Hot Swap . 23 2.1.17 Drive States . ..