Avago Technologies MegaRAID Fast Path Software - Manual (Page 167)

LSI Corporation Confidential | July 2011 Page 167
MegaRAID SAS Software User Guide Chapter 4: WebBIOS Configuration Utility | Viewing and Changing Device Properties
4.8.8 SSD Disk Cache Policy MegaRAID supports changes to the write-cache policy for SSD media of individual
physical drives.
When SSDs are configured in a mixed disk group with HDDs, the Physical Device
Write-Cache Policy setting of all of the participating drives is changed to match the
SSD cache policy setting.
4.8.8.1 Viewing Cache
Properties
Follow these steps to view the SSD Disk Cache Setting property.
1. Click the controller properties link in the main menu.
2. Click Next to view the controller properties with SSD Disk Cache Setting
displayed, as shown in Figure 115 .
Figure 115: SSD Disk Cache Setting in Controller Properties Dialog
4.8.9 Emergency Hotspare When a drive within a redundant virtual drive fails or is removed, the MegaRAID
firmware automatically rebuilds the redundancy of the virtual drive by providing a
emergency hot spare (EHSP) drive, even if no commissionable dedicated drive or global
hot spare drive is present.
4.8.9.1 Emergency Hotspare for
Physical Drives
The Emergency Hotspare property determines whether a particular drive is capable of
becoming a hot spare. This property appears under the controller properties only if the
Global Hotspare for Emergency, and the Unconfigured Good for Emergency
controller properties are enabled.