Thanks!
Moorre's patch resolved the issue for me, in the following setup:
- ASUS H81C, a 2-port eSATA PCIe card based on the ASM1061 chipset, connected (via eSATA) to a Sharkoon 5-bay enclosure
- sleep/wake behavior was fine under El Cap
- installed High Sierra 10.13.4 yesterday, made sure BIOS:CSM compatibility was Enabled
- the enclosure would detect the disks during post, but sleep after the Clover screen, i.e. early on during booting as the Apple logo appeared :-(
- diskutil list would not show the drives, just the one on the top bay
I then tried (in exasperation) the patch directly above, and it now behaves flawlessly during boot, i.e. the enclosure and all its disks are recognized; will test sleeping later today.
Thanks!!!
With greetings from Athens,
Xen