MyBook Duo : Power Light Blinking RED

WD External Drives External Drives for Mac
1

WD My Book® Duo Premium RAID Storage (WDBLWE0080JCH-NESN)
8TB (4TB x 2) RAID 1 external HDD.

Below are detailed symptoms.

Any ideas what could be the issue?

Thanks
JM

Symptoms :
A - 2 disks in RAID
Power light : Blinking RED
Disk 1 Light : not lighted
Disk 2 Light : not lighted

Diskutil does not recognize RAID
Finder : Cannot see drive. Content not navigable. 
WD Drive utilities: Attach a supported WD drive.

B - Disk 1 in slot 1 only
Power light : Blinking RED
Disk 1 Light : not lighted
Disk 2 Light : Steady RED

Diskutil does recognize RAID as 
USB External Physical Volume • Mac OS Extended (Journaled)
Finder : Can see drive. Content navigable.  	
WD Drive utilities: Attach a supported WD drive.

DiskUtil FirstAid results:  		
	Running First Aid on “Media” (disk2s2)
	Repairing file system.
	Volume was successfully unmounted.
	Performing fsck_hfs -fy -x /dev/rdisk2s2
	Checking Journaled HFS Plus volume.
	Checking extents overflow file.
	Checking catalog file.
	Checking multi-linked files.
	Checking catalog hierarchy.
	Checking extended attributes file.
	Checking volume bitmap.
	Checking volume information.
	The volume Media appears to be OK.
	File system check exit code is 0.
	Restoring the original state found as mounted.

	Operation successful.

C - Disk 2 in slot 2 only
Power light : Blinking RED
Disk 1 Light : Steady RED
Disk 2 Light : not lighted

Diskutil does recognize RAID as
USB External Physical Volume • Mac OS Extended (Journaled)     
Finder : Can see drive. Content navigable.  
WD Drive utilities: Attach a supported WD drive.

DiskUtil FirstAid results: 
	Running First Aid on “Media” (disk2s2)
	Repairing file system.
	Volume was successfully unmounted.
	Performing fsck_hfs -fy -x /dev/rdisk2s2
	Checking Journaled HFS Plus volume.
	Checking extents overflow file.
	Checking catalog file.
	Checking multi-linked files.
	Checking catalog hierarchy.
	Checking extended attributes file.
	Checking volume bitmap.
	Checking volume information.
	The volume Media appears to be OK.
	File system check exit code is 0.
	Restoring the original state found as mounted.

	Operation successful.
2

With the way you describe, normally power LED blinking RED indicate a RAID failure. Check you manual. If you able to see your drive mount on the desktop on Mac or in Windows and able to access your data. You can use WD Utilities software to rebuild the RAID.

You can download the software from here Software and Firmware Downloads | WD Support

3

Have you read all of my original post?

As I mentioned in my original post part A
when both drives are in the enclosure
MacOs does not recognize the drive
Diskutil does not recognize RAID
Finder : Cannot see drive. Content not navigable.
WD Drive utilities: Attach a supported WD drive.

I therefore cannot rebuild the RAID with WD Utilities.
The current version of my WD Utilities is 2.1.1.117

Install fails for the latest 2.1.1.119 Release Date: 4/15/2020
even if I run it with root privileges.

See attached install error for 2.1.1.119

WD Utilities-Install-Error-2_1_1_119
WD Utilities-Install-Error-2_1_1_1191226×892 99.8 KB