Thanks for the suggestion Dave. Don't have a USB 2 cable for the WD drive. Tried the cable from another WD drive and a Seagate drive (both USB 3). No change in behavior. Strange I can see the drive in my Startup Disk Panel but won't boot on the restart.
Wondering if I could remedy by cloning the HD to another drive?
Regarding the Fusion Drive. The original conventional HD started showing signs of failure about 6 months ago. Purchased a 1TB drive and had certified Apple rep do the install. He said installing the SSD would not change the Fusion behavior.
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2017 iMac 40 gb RAM; 2TB Fusion SSD (10.14.6)
MacBook Pro 15" 2.3ghz i7/ 16 gb RAM; 500GB SSD (11.1)
Western Digital My Passport Slim 1TB, USB 3.0 for MBP
Envoy Pro EX SSD - Thunderbolt 3 for iMac
Last edited by 2stepbay; 07-24-2017 at 02:13 PM.
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