4,1 with Apple 512GB SSD on Sintech slow pre-boot

[Woof Woof]

I dropped in a 512GB SSUBX AHCI blade removed from a 2014 Mac Mini into a Sintech card in my Mac pro as the boot volume. Performance is great, ~1500MB/sec. The problem is AFTER the boot chime, it takes 60 seconds at the gray screen before it starts to boot. GPU is boot screen capable.

It acts just like I haven't set a boot drive in startup disk, and it is searching for a bootable device. Thing is, I have set it as the startup disk, and it does show as selected in the startup disk panel. Also did CMD-Option-P-R and set the startup disk again.

Do all PCIe mounted SSDs have the 60 second wait?

OS is High Sierra, but I had previously installed Mojave so it does have the 140.0.0.0 boot rom. 48GB RAM if that matters.

 

[crjackson2134]

I dropped in a 512GB SSUBX AHCI blade removed from a 2014 Mac Mini into a Sintech card in my Mac pro as the boot volume. Performance is great, ~1500MB/sec. The problem is AFTER the boot chime, it takes 60 seconds at the gray screen before it starts to boot. GPU is boot screen capable.

It acts just like I haven't set a boot drive in startup disk, and it is searching for a bootable device. Thing is, I have set it as the startup disk, and it does show as selected in the startup disk panel.

Do all PCIe mounted SSDs have the 60 second wait?

OS is High Sierra, but I had previously installed Mojave so it does have the 140.0.0.0 boot rom. 48GB RAM if that matters.

SSUBX is a great drive but they boot VERY SLOW. Sometimes you can move it into a different slot and improve things. I think mine booted very quickly in Slot 2 (16x), but it ran at half speed. It probably doesn't work that way anymore since all the firmware changes, but you can give it a try.

In any case, it's NOT ABNORMAL.

Also, almost forgot to say... Mine is a 5,1 not a 4,1 so I'm not sure if that matters or not.

 

[Woof Woof]

SSUBX is a great drive but they boot VERY SLOW. Sometimes you can move it into a different slot and improve things. I think my booted very quickly in Slot 2 (16x), but it ran at half speed. It probably doesn't work that way anymore since all the firmware changes, but you can give it a try.

In any case, it's NOT ABNORMAL.

Also, almost forgot to say... Mine is a 5,1 not a 4,1 so I'm not sure if that matters or not.

Thanks for the reply. I'll try another slot to see what happens. Overall it isn't a big deal, just surprising.

10.14.4 working well?

 

[handheldgames]

Thanks for the reply. I'll try another slot to see what happens. Overall it isn't a big deal, just surprising.

10.14.4 working well?

make sure you have upgraded to firmware 140 or greater. apple changed how the mac pro addresses pcie 3.0 devices. The boot issue comes from the ssubx as it is a pcie 3.0 device, running in the cmp/pcie 2.0 system. slot 2 or 3/4 can also change up how the ssubx reacts in a boot situation.

 

[Woof Woof]

Tried 2, 3, 4 and all have the delay. It is only there on cold boot, not on restart.