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Installing an NVMe SSD in the WWAN Slot of a Dell 7390 2-in-1
Hello.
I've been attempting to install an NVMe SSD into my 7390 2-in-1's WWAN slot with limited success.
System info:
Bios Version: 1.11.1
Have also tried 1.1.4, 1.2.2, 1.2.3, 1.3.1, 1.4.2.
New SSD: Toshiba KBG30ZMS256G NVMe 2230.
Symptoms:
I've confirmed the SSD is working properly by plugging it into the main SSD slot and successfully installing Kubuntu on it.
SSD is recognized in BIOS when installed in the WWAN Slot. However, when the SSD is plugged into the WWAN slot, I cannot boot from it nor can I see it from inside my Windows/Linux installation in my other SSD.
It is not visible in DISKPART or Disk Management from within Windows, nor is it visible from within Kubuntu.
I've seen at least one other user report being successful in using an NVMe SSD in the WWAN slot on a 7390 2-in-1.
I'm thinking it may be driver related, considering the fact that the BIOS does detect the drive, but my OS installations do not.
Does anyone have any suggestions on how I may proceed?
jphughan
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March 9th, 2020 11:00
If you've found someone else who's gotten it working, perhaps reach out to them? If it does in fact work, then it should simply be plug and play, and it sounds like you've already tried a bunch of BIOS releases to see if that makes a difference. I'm actually surprised it works at all, although I believe that WWAN slots are often wired as PCIe x1 slots. If the slot is PCIe 3.0, then an x1 link has a theoretical max throughput of 1 GB/s, just fyi. In fact that might be the issue, in that perhaps the specific SSD you're using won't allow itself to run at x1 speeds, whereas other SSDs might be fine with that? Maybe find out what model SSD the person who reported success is using.
Derek M
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March 10th, 2020 07:00
Hi, I have a Toshiba M2 2230 NVME PCIe SSD in my WWAN Slot on my E5250. Win10 Home. Here's my original post https://www.dell.com/community/Latitude/INFO-Installing-a-M-2-SSD-in-the-WWAN-slot-E5250-IT-WORKED/m-p/7467556#M18566
I only use mine as a back up internal drive, I've never tried to use it as a boot drive. I not sure the bios would recognise a boot from the WWAN. It should work as a Internal backup drive. BTW I have the exact same M2 NVME type Toshiba SSD, except mines a 128gb
John 2021
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May 24th, 2021 07:00
I am trying to install NVMe SSD (2242) in WWAN port for my Dell 7390 (not 2-in-1) and BIOS is not recognized. Could you please let me know what SSD and bracket you are using? I would like to try it.
Thank you so much!
John Yu
Hakim077
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July 31st, 2024 08:15
@John 2021 same as me, so did you find out how to make it recognized?