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Hi I'm new in the linux community, recently I installed ubuntu in my notebook an Acer Nitro 515-52. I already had Win10 in his ssd, and I partitioned my 1Tb HDD to install Ubuntu 20.04. The installation occurred fine (I think). The Ubuntu takes a long time to boot and after the start up, it takes a while to get faster. I know that this may be related to the HDD, but i was searching about some BIOS configurations and i realized that i had installed with the option "RST with optane" active, instead of AHCI. I changed the option, and it didn't had any impact in the booting time, if I install the ubuntu again with the AHCI option on, it could have any impact in the booting time?

Thanks

Vitor Melo
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    RST doesn't affect boot time. – Pilot6 Aug 03 '20 at 21:34
  • Take a look at `systemd-analyze blame` to see what's happening during your boot process. Chances are good that you can speed it up by masking/stopping some of the services. – KGIII Aug 03 '20 at 22:01
  • If you can have Ubuntu boot from Optane SSD instead of HDD that would be great for boot speeds. Be forewarned it's complicated... – WinEunuuchs2Unix Aug 04 '20 at 02:14
  • Have you updated UEFI & SSD firmware to latest available? See also: Acer Aspire A515-54G Newer Acer - CTRL S on the main Tab in BIOS to get the option to change SATA to AHCI https://askubuntu.com/questions/1211911/cannot-install-ubuntu-on-acer-aspire-a515-54g-laptop-hard-drive-not-detected Acer Aspire 5 Model A515-54-5649 Intel Core i5-10210U Install Tutorial https://ubuntuforums.org/showthread.php?t=2437702 – oldfred Aug 04 '20 at 03:39

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