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Can't boot to Windows 10 after changing SATA mode and RAID
So at first, I was trying to resolve an issue with my BD-ROM drive described here: XPS 8700 - BD-ROM (HL-DT-ST DVDRW/BDROM CH20N) Not Recognized Windows 10 - Disk Drives (HDD, CD/DVD, Blu-ray) Forum - Disk Drives - Dell Community
However, when attempting to try different things, I am now in a position where I can no longer boot to Windows 10. More specifically, when I turn on my computer, I get an error saying no bootable drives found and it just lists my SATA 1, 2, 3, etc. drives with an option to restart or go to BIOS setup. In other words, I don't even see Windows anymore existing.
My basic computer specs:
Dell XPS 8700 SE
Intel Core i7-4700
Windows 10 with 1511 update
2TB hdd with 32GB mSATA SSD cache drive
16GB RAM
BD-ROM
I need help to get Windows working again, and hopefully, get back my data. Here's what I did to cause the problems:
1) I went to Dell UEFI BIOS setup, and changed the SATA mode from "RAID" to "AHCI". Saved and exited BIOS.
2) After rebooting, Windows failed to load, had a consistent blue screen with the sad smiley face with error "IO1_INITIALIZATION_FAILED", automatic repair also failed.
3) I tried reverting back to "RAID" in SATA mode in BIOS, but it failed to change anything. Windows still wouldn't boot
4) I then entered into the special BIOS menu showing devices which listed my mSATA cache drive and hard drive and RAID settings. Since it showed that the cache drive was "Disabled", I thought I could fix my issues by re-creating the RAID array.
5) I tried to delete the current RAID setup shown in that BIOS menu, then chose the option to recreate the RAID0 array by selecting the option to create a "Striped Disk Array".
6) Once I did the above, Windows itself disappeared, and trying to undo the RAID0 option did not fix anything
So now I am no longer seeing Windows, not sure if my data on the hard drive still exists, and my cache drive (obviously) is not working.
Any ideas how to fix without doing a clean reinstall and losing all my previous data in Windows?
Thanks for any help you can provide!