Z370 Extreme4 drive disappears

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   I have the exact same motherboard and the exact same issue. 
My drives are as follows:

Samsung M.2 (boot drive)
Corsair SSD
RAID Array  HDD
External USB 3.0 HDD

It is the Corsair hard drive that randomly disappears, sometimes mid-write even.  As you mentioned, a warm boot (restart) fails to fix the problem, but a cold boot (shut down, power back on) immediately fixes the problem, albeit only temporarily until the next disappearance.

I have tried replacing the SATA cable, changing the SATA port, updating my SSD firmware, and updating the motherboard bios (running 3.1 also), and the issue is still present.

My hunch is it's the motherboard as I've had this SSD on other motherboards, and it has performed nigh flawlessly.  All S.M.A.R.T. tests and hard drive health indicators come back green across the board.  My first guess would be motherboard issue, second guess would an OS or hard drive issue.

I don't know about you, but my motherboard has been a little finicky since day one.  First, there's the well-documented XMP Memory bug (http://forum.asrock.com/forum_posts.asp?TID=6860&PN=8&title=z370-extreme4-xmp-bug).  Second, I've had difficulty getting Fast Boot to work correctly (I just get a black screen on boot and have to reset the CMOS).  Now, hard drives randomly disappear.

Maybe it's wrong of me to blame the motherboard, but given how finicky it's been, that's my hunch.  I know Asrock typically has a pretty good reputation, but this motherboard seems like a lemon.  I would love to be wrong.  If anyone finds a solution, please share.

Edited by ardentlyenthused - 16 Aug 2018 at 6:48am

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ardentlyenthused Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Aug 2018 Status: Offline Points: 1	Post Options Post Reply Quote ardentlyenthused Report Post Thanks(0) Quote Reply Topic: Z370 Extreme4 drive disappears Posted: 16 Aug 2018 at 6:47am
	I have the exact same motherboard and the exact same issue. My drives are as follows: Samsung M.2 (boot drive) Corsair SSD RAID Array HDD External USB 3.0 HDD It is the Corsair hard drive that randomly disappears, sometimes mid-write even. As you mentioned, a warm boot (restart) fails to fix the problem, but a cold boot (shut down, power back on) immediately fixes the problem, albeit only temporarily until the next disappearance. I have tried replacing the SATA cable, changing the SATA port, updating my SSD firmware, and updating the motherboard bios (running 3.1 also), and the issue is still present. My hunch is it's the motherboard as I've had this SSD on other motherboards, and it has performed nigh flawlessly. All S.M.A.R.T. tests and hard drive health indicators come back green across the board. My first guess would be motherboard issue, second guess would an OS or hard drive issue. I don't know about you, but my motherboard has been a little finicky since day one. First, there's the well-documented XMP Memory bug (http://forum.asrock.com/forum_posts.asp?TID=6860&PN=8&title=z370-extreme4-xmp-bug). Second, I've had difficulty getting Fast Boot to work correctly (I just get a black screen on boot and have to reset the CMOS). Now, hard drives randomly disappear. Maybe it's wrong of me to blame the motherboard, but given how finicky it's been, that's my hunch. I know Asrock typically has a pretty good reputation, but this motherboard seems like a lemon. I would love to be wrong. If anyone finds a solution, please share. Edited by ardentlyenthused - 16 Aug 2018 at 6:48am

drjjr Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Jul 2018 Status: Offline Points: 3	Post Options Post Reply Quote drjjr Report Post Thanks(0) Quote Reply Posted: 15 Jul 2018 at 10:12pm
	I have a Z370 Extreme4 with a 250GB WD Black M.2 boot drive, a Seagate 4TB drive D:, a 240GB Corsair Force 3 SSD, and a RAID5 array attached. After some period of time that I have yet to determine, the Corsair SSD disappears from Windows 10. When I warm boot the system, I am unable to enter setup (just get a blinking cursor). If I power cycle the system, I can get into setup, the Corsair drive is there and if I boot into Windows the drive is present. I am running the latest 3.1 BIOS and this occurred on the previous version as well. As I write this the Corsair SSD is present and working properly. Any ideas?