High Sierra slow boot external ssd (T3 samsung)

[hamed8080]

hi friends.
I’m installed High Sierra on imac 2013 21.5 inch and clean install and format external ssd (samsung t3) with apfs but boot time terrible about 2 minute !
So servral reboot not help .
Then instal high sierra with hfs+ and boot time about 44 second .
But i revert back now to sierra 10.12 now boot time 28 second!
So High Sierra absolutely slow in boot time .
Anyone has experience like this ?
Only thing work perfect now is install high sierra on hfs+ and then disable trim now boot time take 22 second even faster than sierra 10.12.5 take 29 second !

 

[Apple_Robert]

There is already a thread on the subject.

https://forums.macrumors.com/threads/slow-boot.2072585/page-2#post-25140925

 

[hamed8080]

Try sudo trimforce disable
and reset pram and scm not help me .
I think problem with internal hdd .
In internal hdd i have only windows installed and delete all other efi partitions .