I had reason to replace the SSD of my boot pool. Afterwards I had to reinstall TrueNAS. That worked. When it came time to reboot, the screen showed all sorts of messages and ended with this:
b1k4 :HardDisk - Alias (null)
PciRoot (0x1)/Pci(0x3,0x0) /Pci(0x0,0x0)/VenHw(CF91FAC5-C24E-11D2-85F9-00A
OCSSEC93B, 82)/HD(1,GPT,C220A99D-604D-4DC6-B250-69991060A4DC,0x800,0x400001)
b1k5 :HardDisk - Alias (nuil)
PciRoot (0x1)/Pci(0x3,0x0)/Pci(0x0,0x0)/VenHw(CF31FAC5-C24E-11D2-85F3-00A
OC93EC93B, B2)/HD (2, GPT, 4D1EC5F1-8F3A-4F97-A5F7-7F36FB3AAD17,0x401000,0xE8A07801)
blk6 :HardDisk - Alias (null)
PciRoot (0x1) /PC1(0x3,0x0)/Pci(0x0,0x0)/VenHw(CF31FAC5-C24E-11D2-85F3-00A
OC93EC93B, B3)/HD(1, GPT, 763EC928-2C91-4EF3-9674-8C5E61112D49,0x1000,0x74705801)
blk7 :BlockDevice - Alias (null)
PciRoot (0x1)/Pc1(0x3,0x0)/Pc1 (0x0,0x0)/VenHw(CF31FAC5-C24E-11D2-85F3-00A
OC93EC93B,80)
blk8 :BlockDevice - Alias (null)
PciRoot (0x1)/Pci(0x3,0x0)/Pc1(0x0,0x0) /VenHw(CF31FAC5-C24E-11D2-85F3-00A
blk9 :BlockDevice - Alias (null)
PciRoot (0x1)/Pci(0x3,0x0)/Pc1 (0x0,0x0)/VenHw(CF31FAC5-C24E-11D2-85F3-00A
OC93EC93B, 82)
bIkA :BlockDevice - Alias (null)
PciRoot (0x1)/Pci(0x3,0x0)/Pci(0x0,0x0)/VenHw(CF31FAC5-C24E-11D2-85F3-00A
ОС9ЗЕС9ЗВ, 83)
Press ESC in 1 seconds to skip startup.nsh, any other key to continue.
Shell>
Regardless of what input I chose, ESC, space, any other key or nothing, I ended up with that shell prompt and further processing halted. Removing the keyboard from the USB port allowed the bootup process to go forward.
Why would having the keyboard connected disrupt booting into TrueNAS?