MyBook Duo (WDBLWE0080JCH-NESN) 8TB (4TB x2) RAID 1 external HDD initially showed 3 red lights.
I have followed jebusx instructions.
1st thing to check, power off the device and remove the hard drives. Remember with hdd go in which slot. Power on the device and check your computer Device manager for Windows, Mac go to System info - USB to see if you computer detect the device.
If your computer can see the device then power off the device and insert one hard drive back to it original slot. Power on the device and see if your computer still see it. You can use WD Utilities to check the device status. If it see the device and the hard drive. Then power off the device and insert the last hard drive.
If I insert only 1 drive, WD Drive Utilities and Mac Diskutil can see either one that I insert.
It says RAID is degraded.
I have 2 x 4TB WD40EFRX in RAID1 mode.
How do I know which drive is in defect since I have the same symptoms when only 1 drive is inserted ( either drive 1 or drive 2) ?
Thanks
JM
