AHCI for SSD in Windows 10? Needed?

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stratman70
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2018/09/28 17:51:50 (permalink)

AHCI for SSD in Windows 10? Needed?

 So, Samsung Magician says this is disabled. Win 10 Pro. I have 1 Samsung Evo 850 SSD (OS drive) and storage evo 970 nvme m.2 (samples)
 EDIT: Also, PC boots fine and fast, BUT, I cannot set the OS drive, evo 850SSD as the boot device. It is NOT even an option. It is listed in the SATA list-It is SATA#1. But it does NOT appear in the boot menu? Very strange, to me anyway. I will google all this.
Do I enable it or leave it?
Thanks
post edited by stratman70 - 2018/09/28 18:29:06

 
 
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16 Replies Related Threads

    fireberd
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/28 18:45:08 (permalink)
    I have an 850 EVO for the OS in Win 10 and I have AHCI selected. 
     

    "GCSG Productions"
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    #2
    stratman70
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/28 18:49:23 (permalink)
    Going to give it a shot. Perhaps that is the reason I cannot select the 850 EVO ssd as the boot drive in the BIOS. even though it certainly DOES boot from the 850, I mean it is the only Win 10 installation.
    Just saw your config. I also have an Asus Motherboard.
    Thanks again
    Frank

     
     
    #3
    slartabartfast
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/28 19:12:18 (permalink)
    If your boot drive is not AHCI then changing it to AHCI in bios/uefi may result in a non-boot because the driver for AHCI is not automatically loaded with Windows. There is a registry hack that will allow you to do that after installation:
     
    https://www.tenforums.com/tutorials/22631-enable-ahci-windows-8-windows-10-after-installation.html
     
    #4
    stratman70
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/28 20:20:26 (permalink)
    OK Thanks. I will try and find out. It's an Asus Z370 Prime A

     
     
    #5
    fireberd
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/29 14:06:29 (permalink)
    There is a big thread on the tenforums.com about the ASUS Z370 board.  May be most is about overclocking and tweaking but may be something to browse.
    https://www.tenforums.com...us-x-motherboards.html

    "GCSG Productions"
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    #6
    mettelus
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/29 14:41:38 (permalink)
    Trying to remember this, but the UEFI (BIOS) for ASUS is a bit unique, and the AHCI rings a bell. If you run the tweaking algorithm in UEFI was when it popped up on me saying that a RAID configuration is required (even if not used) or "x" feature gets disabled. I cannot for the life of me recall what "x" feature was, but wanted it. It should be in the documentation and may also pop up if you shift in/out of AHCI in the UEFI. To Win10, it doesn't seem to see a lot of what the UEFI has done, i.e., I am not using RAID in Windows.

    Sheesh, so many acronyms while typing on a phone is just painful!

    ASUS ROG Maximus X Hero (Wi-Fi AC), i7-8700k, 16GB RAM, GTX-1070Ti, Win 10 Pro, Saffire PRO 24 DSP, A-300 PRO, plus numerous gadgets and gizmos that make or manipulate sound in some way.
    #7
    fireberd
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/29 15:12:36 (permalink)
    I have my BIOS at default, except for fan control for quiet operation. The last two BIOS updates I only changed the fan settings, the rest is at "factory default" as a BIOS update resets everything to "factory default".
    The "ROG" motherboards have lots of options but I'm not overclocking so I leave it alone.
     

    "GCSG Productions"
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    #8
    stratman70
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/29 22:12:47 (permalink)
    I am no overclocker either. That's why I saved a little $$ by getting the gen 8, i7 8700 and not the 8700K. 
    I must say I have never , ever had a pc this quiet.
    Noctua massive heatsink with 2 big fans and a Geforce GTX 1060 GAmi9ng x 6GB. It is actually an older one. 
    Thanks guys
    Frank

     
     
    #9
    fireberd
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/29 22:30:07 (permalink)
    I have a "K" model but only because it was on sale at the same price as the non K model.  I have no need to overclock. 
     

    "GCSG Productions"
    Franklin D-10 Pedal Steel Guitar (primary instrument). Nashville Telecaster, Bass, etc. 
    ASUS ROG Maximus VIII Hero M/B, i7 6700K CPU, 16GB Ram, SSD and conventional hard drives, Win 10 Pro and Win 10 Pro Insider Pre-Release
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    #10
    stratman70
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/29 23:56:22 (permalink)
    mettelus
    Trying to remember this, but the UEFI (BIOS) for ASUS is a bit unique, and the AHCI rings a bell. If you run the tweaking algorithm in UEFI was when it popped up on me saying that a RAID configuration is required (even if not used) or "x" feature gets disabled. I cannot for the life of me recall what "x" feature was, but wanted it. It should be in the documentation and may also pop up if you shift in/out of AHCI in the UEFI. To Win10, it doesn't seem to see a lot of what the UEFI has done, i.e., I am not using RAID in Windows.

    Sheesh, so many acronyms while typing on a phone is just painful!

    That's exactly what I see, the pop up about the raid config is required or X will be disabled crap. 
    I just get not get my head around the ffact that I can boot fine and very, very fast, yet my OS\boot drive is NOT listed in the boot priority section where I can change the order. My optival drive and my nvme m.2 drive are the only ones listed? Go figure.
     
    Think I'll search the Asus MB sites as FB suggested.

     
     
    #11
    Kev999
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/30 01:21:26 (permalink)
    fireberd
    I have a "K" model but only because it was on sale at the same price as the non K model.  I have no need to overclock.

     
    I had no intention of overclocking either. But when I initially booted up my new system I found the CPU freq to be set 4.1GHz rather than the base freq 3.6GHz. I had purchased an ex-demo motherboard and presumably it had retained the settings from its previous use. This has never caused any apparent problems so I just left it as it was, i.e. overclocked.

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    #12
    mettelus
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/30 02:16:27 (permalink)
    Win10 plays a part in things too. I was initially wondering why the disk numbers were all out of whack (they are actually in exact reverse order of the letters), then realized it would take way to much effort to change them so just let them be. It just looks really weird in imaging programs when "Disk 3" is the C: drive. If your machine is working without issues, don't get too caught up in trying to micromanage things. One feature I do appreciate with the new boards is that they will update the BIOS via the internet without issues.

    ASUS ROG Maximus X Hero (Wi-Fi AC), i7-8700k, 16GB RAM, GTX-1070Ti, Win 10 Pro, Saffire PRO 24 DSP, A-300 PRO, plus numerous gadgets and gizmos that make or manipulate sound in some way.
    #13
    slartabartfast
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    Re: AHCI for SSD in Windows 10? Needed? 2018/09/30 21:22:15 (permalink)
    Speed may not be the issue with AHCI, but at least in earlier Windows versions, AHCI was reportedly needed (or not) to use Windows TRIM. If that is true of Win 10, then you should enable AHCI. My Prime 370-A came out of the box with AHCI set, so unless you have changed it, your host controller should be able to use it. To see if Windows has loaded an AHCI driver, look in device manager under ATA/ATAPI controllers for an AHCI controller. If none is there, you will need to set it in uefi, with the caveat mentioned in my post above. 
     
    To see if TRIM is enabled you need to open an elevated command prompt (CMD in search box to bring up Command Prompt icon, right click on that and choose run as administrator from the drop down) and type:
    fsutil behavior query DisableDeleteNotify
    hit return and if it returns:
    DisableDeleteNotify = 0
    then TRIM is enabled.
     
    Google should have brought you to a number of reports from people who have your drive who have had similar problems and seem to have resolved it by using a mysterious ritual as follows:
    set an open Windows session to boot at the next boot so that it boots into safe mode
    restart
    enter uefi prior to the loading of Windows safe mode and set your controller to AHCI
    close UEFI and allow to fully boot into safe mode
    restart 
     
    I have no explanation for why that might work, except that there may be an installed driver that is hijacking Windows recognition of your drive and plugging it into the AHCI controller driver. Safe mode may bypass that and let Windows do its thing.
     
     
    post edited by slartabartfast - 2018/09/30 21:59:01
    #14
    stratman70
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    Re: AHCI for SSD in Windows 10? Needed? 2018/10/01 16:04:20 (permalink)
    Hey SB
     
    Just saw this. Great info. I did find many posts like you stated. I did finally get it changed but still my Samsung evo 850 ssd os\boot drive does NOT appear in the boot priority but does work fine and does appear in the boot menu F8. So, as suggested here, I will not worry about that .
    I did s you suggested with device mgr and I do have 2 Achi drivers listed in Device mgr-one standard and one intel 300 series chipset achi.
    Also, yes trim is enabled-thanks for the command prompt....
    Is their anyway I can tell which one my ps drive is using? Does it matter?
     
    Thanks for the great info!

     
     
    #15
    Jim Roseberry
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    Re: AHCI for SSD in Windows 10? Needed? 2018/10/02 15:02:02 (permalink)
    If you change the HD controller mode, boot into Safe Mode... then restart the machine.
    That should solve the issue.
     
    If your new SSD doesn't show in the boot order, go to the HDD BBS Priority menu... and make the new SSD the first drive in that list.  It should now show up in the boot order.  

    Best Regards,

    Jim Roseberry
    jim@studiocat.com
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    #16
    stratman70
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    Re: AHCI for SSD in Windows 10? Needed? 2018/10/02 19:59:40 (permalink)
    Thanks Jim!  That did it!

     
     
    #17
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