Adaptec 7805Q Unable to switch from RAID to HBA


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Hi, I am finally ready to convert one of my Hyper-V servers to Unraid.

This machine has 8 drives, in 3 volumes, managed by an Adaptec 7805Q RAID controller.

I am using the Adaptec BIOS utility, I deleted all volumes, I unintialized 6 of the 8 drives, 2 drives are grayed out, I can't select them to be uninitialized.

When I try to switch from RAID to HBA, I get an error that I need to delete all volumes and uninitialize all drives.

 

Any idea why some drives cannot be uninitialized, or an alternate way to force the switch to HBA mode??

 

Update: I mounted and booted into the bootable ISO support environment, and found that MaxCache was enabled on those drives. Disabled it, and was able to enable HBA mode. (MaxCache is not configurable from the BIOS) 

Edited by ptr727
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  • 4 years later...

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