Asus Z-170p don't recognize SSD Samsung 950 Pro

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patchkov

Commendable
Sep 18, 2016
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1,510
Hi! I have problem with my mobo Asus Z-170p (https://www.asus.com/Motherboards/Z170-P/). It don't recognize my SSD Samsung 950 Pro. I mean that in UEFI M.2 interface is shown as 'Empty' but I could boot from this disk and install system (attached screens). In addition I think boot time is too long about, 17 second from POST procedure to login screen in Windows.
On the other hand results from CrystalDiskMark are correctly (attached screen). What I should do?

https://postimg.org/image/y3b3er4hd/ -> UEFI
https://postimg.org/image/u87pc6lbl/ -> UEFI

https://postimg.org/image/k68g9l9qv -> CrystalDiskMark screen
 
Solution
Gillerer
I've heard PCIe may introduce some additional delay in booting. Especially enterprise-oriented drives (or consumer drives derived from them, such as Intel SSD 750 series) suffer from this.

The video doesn't include the BIOS/UEFI startup at all - the person doesn't save any BIOS changes, so Windows loads directly after exiting BIOS (from boot menu). This means he's not actually measuring boot time, but Windows load time. BIOS loading is the time where the additional delay would show - and where most time is spent on any SSD-equipped system. Windows "Fast boot" may be also enabled - this reduced Windows start time after shut down, since it's actually waking up from hibernation.

I found another video where BIOS settings are altered and...
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Gillerer

Gillerer

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Sep 23, 2013
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18,940
In image #1, it clearly says "SATA Information" above the M.2. You don't have an M.2 SATA drive - you have M.2 PCIe.

In image #2, have you clicked to open the second "M.2"? (The first "M.2" is obviously a heading - same as the following sata port heading.) It has an arrow beside it that would indicate sub-items.
 
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patchkov

Commendable
Sep 18, 2016
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1,510


Thanks for your answer. Now it is so obviously. Yes, I clicked in arrow and it allow only change name. What do you think about boot time? Is it correctly result? I found movie where this operation is 2 times faster (https://www.youtube.com/watch?v=HnoEKm-RoXU). In my boot menu I don't have Windows Boot Manager. Is it normal?
 
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Gillerer

Gillerer

Distinguished
Sep 23, 2013
361
81
18,940
I've heard PCIe may introduce some additional delay in booting. Especially enterprise-oriented drives (or consumer drives derived from them, such as Intel SSD 750 series) suffer from this.

The video doesn't include the BIOS/UEFI startup at all - the person doesn't save any BIOS changes, so Windows loads directly after exiting BIOS (from boot menu). This means he's not actually measuring boot time, but Windows load time. BIOS loading is the time where the additional delay would show - and where most time is spent on any SSD-equipped system. Windows "Fast boot" may be also enabled - this reduced Windows start time after shut down, since it's actually waking up from hibernation.

I found another video where BIOS settings are altered and saved, and the computer restarted (BIOS included): https://youtu.be/kweqUUcSYOA?t=57. Takes a lot longer, and isn't many seconds faster than my SATA SSD.

Different motherboard vendors have different BIOSes, but everyone has boot menu as in that video for one-time selection of alternate boot location. It can be used to boot from the default drive as well (as shown in the video).
 
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Solution
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patchkov

Commendable
Sep 18, 2016
3
0
1,510


Thank you, this movie helped me a lot! I disable CSM (Compatibility Support Module) and then I converted my system partition to GPT (before it was MBR) and installed system from new. I think my system starts faster now.
 
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