Dell PowerEdge RAID Controller 10 User’s Guide PERC H345, H740P, H745, and H840 Series Controllers

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Enhanced HBA mode

Enhanced HBA mode or eHBA mode is an alternative mode for PERC 10 series controllers.

NOTE:Older versions of OpenManage Storage Management and Comprehensive Embedded Management do not support management of the controller in the eHBA mode.

NOTE:In the eHBA mode, non-RAID disks are enumerated first in ascending order, while RAID volumes are enumerated in descending order. For more information, see the applicable systems management documentation.

NOTE:The only controllers that support eHBA mode are H740P, H745, and H745P MX. eHBA mode is not supported on H345 and H840.

The major differences and similarities between RAID mode and eHBA mode are listed in the following table:

Table 1. Enhanced HBA modes in PERC10 controllersEnhanced HBA modes in PERC10 controllers
Controller operating mode	Enhanced HBA mode (H740, H745, H745P MX)	RAID mode (H740, H745)	RAID mode (H745P MX, H840)	RAID mode (H345)
Supported RAID levels	0,1,10	0,1,5,6,10,50,60	0,1,5,6,10,50,60	0, 1, 10
Present non-RAID disks to the host. (see Non-RAID disk)	Yes	No	No	Yes
Automatically converts all unconfigured disks to non-RAID disks during system boot, controller reset, and when unconfigured disks are hot-inserted.	Yes	No	No	No
Write back-caching	Yes (VDs only)	Yes	Yes	No
Key management support (see Security key and RAID management)	LKM	SEKM and LKM	LKM	No
Patrol read	Yes (VDs only)	Yes	Yes	Yes (VDs only)