Viewing Virtual Drive Properties

Select a virtual drive from a drive group in the Controller dashboard to view its properties.

Figure 1. Virtual Drive Properties Window


Table 1. Virtual Drive Properties
Property Description MegaRAID iMegaRAID SoftwareRAID Initiator- Target
Status The current status of the virtual drive. These options are available:
  • Optimal

  • Partially Degraded

  • Degraded

  • Offline

Yes Yes Yes No
Current Read Cache Status The read cache policy for the virtual drive. These options are available:
  • Read Ahead

  • No Read Ahead

Yes Yes Yes No
Current Write Cache Status The write cache policy for the virtual drive. These are available:
  • Write Back

  • Write Through

  • Always Write Back

Yes Yes Yes No
Current IO Status The input/output policy for the virtual drive. These options are available:
  • Direct IO

  • Cached IO

Yes Yes Yes No
Host Access Policy
Note:

This property appears only if the controller supports High Availability DAS.

Indicates whether the virtual drive is shared between the servers in a cluster. The values for this property are Shared, Exclusive, and Exclusive to Peer Controller. No No No No
Peer Has No Access
Note:

This property appears only if the controller supports High Availability DAS.

Indicates whether the peer controller has access to the shared virtual drive. This property appears only if the virtual drive is shared. No No No No
Access Policy The access policy for the virtual drive. These options are available:
  • Read Write

  • Read Only

  • Hidden

The Hidden policy is applicable for only hidden virtual drives. No other access policies are applicable after you select Hidden as the access policy.

Yes Yes No No
Drive Cache The virtual drive cache setting. These options are available:
  • Unchanged

  • Enable

  • Disable

Yes Yes Yes No
Data Protection Indicates whether data protection feature is enabled for the virtual drive. Yes Yes Yes No
SSD Caching Indicates whether SSD caching is enabled. Yes Yes No No
Default Write Cache Policy
  • Write Through

  • Write Back

  • Always Write Back

Default Read Cache Policy
  • Read Ahead

  • No Read Ahead

Default IO Policy
  • Direct IO

  • Cached IO

1 Write cache of the LUN is not supported by all target enclosures. Refer your enclosure's documentation to determine whether Write Cache is supported on your device.