System stopped recognizing Internal (RAID) HD

Brief Overview
Computer has 4 hard drives (C, D, E, & H) and 2 DVD drives.
The other night, went into the BIOS menu to change the boot order (so we could boot from DVD)
Since rebooting, the system doesn't see the H drive.
Disk Management prompts me to Initialize Disk, and shows Disk 3 & Disk 4 as Unallocated / Not Initialized.

Tech info
Highlighting the problem drive
Before:

Code:

>WMIC DISKDRIVE GET INDEX,CAPTION
  Caption                                    Index
  MARVELL Raid VD 0 SCSI Disk Device         3
  Samsung SSD 840 EVO 120G SCSI Disk Device  2
  Samsung SSD 850 EVO 250G SCSI Disk Device  0
  WDC WD1003FZEX-00MK2 SCSI Disk Device      1
  Seagate Ultra Slim MT USB Device           4

According to Disk Management,

• Disk 0 = C:
• Disk 1 = D:
• Disk 2 = E:
• Disk 3 = H:

(Disk 4 was an External USB Drive I had plugged in at that time.)
After:

Code:

>WMIC DISKDRIVE GET INDEX,CAPTION
  Caption                                    Index
  Samsung SSD 840 EVO 120G SCSI Disk Device  2
  Samsung SSD 850 EVO 250G SCSI Disk Device  0
  WDC WD1003FZEX-00MK2 SCSI Disk Device      1
  WDC WD20 EZRX-00D8PB0 SCSI Disk Device     3
  WDC WD20 EZRX-00D8PB0 SCSI Disk Device     4

When I look at the BIOS menu, this is the list of drives:

• P1: TSSTcorp CDDVDW SH-223C
• P3: TSSTcorp CDDVDW SH-223F
• P2: WDC WD1003FZEX-00MK2A0
• P5: Samsung SSD 840 EVO 120 GB
• Windows Boot Manager (P5: Samsung SSD 840 EVO 120GB)
• P0: Samsung SSD 850 EVO 250GB
• SATA PM WDC-WD20EZRX-00D8PB0
• SATA PS WDC-WD20EZRX-00D8PB0

This may be unrelated, but after the system stopped recognizing the drive, I checked the Event Log and found hundreds of System Errors: The driver detected a controller error on \Device\Harddisk0\DR0.

Web searches have turned up past recommendations to use Partition Wizard to recover unallocated drives, but I'm not sure how that works, given their status as a RAID array.

Thanks in advance for any help you folk can provide.

what is your motherboard make/model and its age, if it's a consumer grade motherboard where they all support RAID now either by Intel or Marvell or whoever, my limited experience with a new intel based board motherboard i bough last year for home was going to do raid but had a bad experience such as drive partitioning and raid setup being lost when i was testing everything up front changing BIOS / EFI settings that I thought should not have affected by raid setup, but it did. I don't bother with RAID except at work if it's a legitimate raid setup like LSI and even then it can be very tempermental, with 4+ gb drives now I just simply use 2 one for data and one for backup.

check you mobo manual for what sata ports are marked as what if it's a home board, usually sata0 and sata1 have settings to treat as solid state disks, the raid firmware/oprom willl only use disks on certain sata ports.

I have two WD 500G in a RAID 0 array.
When I did a BIOS update, it has changed the controller from RAID to AHCI and as I didn't see, it destroyed the array.

So, anytime you do a BIOS update or reset, BEFORE booting, check if SATA controller in BIOS is set to RAID.