Hello everyone,

I recently tried to give my Mainboard, ASUS P8Z77-V LX full NVMe support using this description. Since the mainboard does not have the ASUS USB Flashback Feature, I copied the modded BIOS .CAP file to a FAT32 USB Stick and tried to flash it using the EZ-Flash Application directly from the BIOS. But when I did so, I got an error Message telling me, the "Security verification failed!". First I thought this could be the case because of file naming, but when I renamed the modded BIOS .CAP file to the name of the original .CAP file, this didn't work either.

I also did the Hex Editing mentioned and linked in the first blogpost but this also had no effect (maybe I did it wrong?).

Does anybody have any idea how to fix this? Any help would be appreciated!

EDIT: Added BIOS Files

I since had the belated idea to check my modded bios against a reported working bios for a X10Dri on sth (posting link apparently not allowed, as I'm too new DuckDuckgo search: "supermicro x10drh-it nvme boot") brings up the topic for me.
Unfortunately, my mod and this reported working one are both in identical places in the bios, so that doesn't appear to be the issue.
Means that I'm kinda stuck for the moment. Not sure where to go from here, so if anyone has any insights, I'd love to hear it.
Only thing I can think of is that I'm simply not able to find the option in the bios, though I feel I have searched quite exhaustively. All suggestions most welcome.

edit: added original most recent X10DRH-iT bios, as well as the modded version that the board is currently running

@Fernando: Just in case you don't receive a notification of an edit, I have added both bios files to my previous post.
Thank you very much for taking the time to look into it. Most curious what might be going on.
Could this be related to the nvme card I'm using? I have a single pcie to nvme card from the Chinese comrades at the moment, but I have 4 original supermicro 2x nvme cards on the way, so if it's related to that that ought to clear it up.

Ok, thank you. Guess I'll go back to fiddling with the bios. There must be an option there somewhere I missed then. Hadn't gotten to chapter 4 yet, but I'll check it carefully and hopefully won't need to bother anyone here with it.

Edit: Just looked at chapter 4. Seems win10 oriented, I'm going to see if I get Debian working and I'll report back how it goes.

As Fernando mentioned...u will only see (depends on motherboard model/bios) the PATA device after an OS installed, before u might not see anything in bios, remember that this is a MOD, not an official solution in Aptio bioses.
But the NVMe drive is visible in destination drive in OS setup, if the mod is OK, of course following the OS installation guide (Pure UEFI/GPT only).
So u can test it during an initial Windows setup before Debian.

Ok. That's interesting. I did an install to an nvme drive before on this board - I was able to boot debian, it saw the nvme drive, and I was able to install to it, I was just unable to boot from it.
I'll go through everything looking for that CSM setting and then just try and install to a new drive, see if it becomes bootable this time.

Thanks for all the help, great forum. I assume there must be a donate link somewhere? My PiHole kills pretty much all ads...

I've had another root around in the bios, I've found the csm setting and it is enabled.
From what you're saying about the way the mod works, I'm assuming a uefi section needs to be found on the mounted nvme drive in order for anything to be displayed in the bios?

IIRC, the windows boot manager thing lives in a sort of own partiton on a drive, the same for the linux uefi flavour and that's what needs to be detected for the PATA boot option to show in the bios. Just trying to get an impression of how it ties together. I'll let you know how things go, I may just do a minimal debian install on a different rig and then move, the nvme over and see how things go from there.

Lets clear the point here, the NVMe mod, its the insertion of the NVMe DXE driver in order to be loaded by UEFI system bios.
An NVMe drive will always be present in a system with or without bios mod, as storage device or to install an OS, but even after an install, the next reboot
it needs the NVMe DXE driver (MOD) to load to access a fresh installed OS on the 1rst reboot or it will fail as u already noticed, this seems not to be ur issue, ur issue is no available PURE UEFI environment system bios (CSM OFF)
So get a full understanding of ur motherboard settings and discover urself the correct way of enable UEFI boot on the motherboard, without it, the MOD wont work as its presented by Fernando.

A quick look with AMIBCP, i saw a lot of options to boot in ur Aptio V bios, including UEFI boot, UEFI new entries etc...dig a little more.

If the mod makes it possible, I'm sure I'll find it. I gave up with my last nvme install because I found a post from supermicro stating that nvme boot wasn't supported. The board does indeed have a wealth of options.

Just waiting for a new nvme drive to come in, and I'll give it a go. I'll do a new UEFI install and then play with the bios, see if it will work with everything set to UEFI.

Hi Fernando, it's been 3,5 years already running a NMVe SSD as bootdrive on my Z77 system, with great succes thanks to your detailed tutorial! But last week I've ran into trouble, can you help me once again?

I've installed an extra PCI SATA3 expansion card, and suddenly my system doesn't see the NMVe SSD anymore. POST hangs before it can boot, and my motherboard gives code 64: "CPU DXE initialization is started" -or- code B4: "USB Hot Plug" (see attached picture), and also the "BOOT_DEVICE_LED" light is on (means error). I cannot enter the BIOS, and have to flash the BIOS to stock 2104 (latest official) with USB FlashBack to regain access to the BIOS. When I insert the uncompressed .ffs NMVe module again to the stock 2104 BIOS and do USB Flashback, the same thing happens: POST hangs at the same point. I've already tried removing the new SATA3 expansion card, but to no avail. Weird thing is it did work! Do you know why it suddenly decided to stop working? I hope you or someone can help me with this.

Picture of motherboard error code: https://postimg.cc/vDW3NQf2

Note: when I boot on stock BIOS and start a Rescue Bootdisk from USB, it does show my bootdrive (the NMVe SSD) in Windows Explorer.

Hello! I've succesfully installed an WD SN550 NVME SSD on my old Asus Rog G771JW laptop (with no nvme support) using this thread. First of all, thank you for making it so user friendly, it was quite enjoyable. Secondly, i'm running into some problem..whenever i restart from windows (10), it won't boot unless i fully shut it down, pressing the power button for a few seconds and then powering it back on. I do have another HDD installed on my laptop, with no other operating system on it. My bios settings are like follows:
- CSM disabled (enabling it won't help)
- Secure boot disabled (enabling it won't help)
- Sata Configuration is AHCI (changing to the only other option IDE wont help either)
- No other boot options in the boot sequence (only windows boot manager)
Am i doing something wrong? Any advice would be highly appreciated.