BIOS Modes

[tb]

I have an old Intel DP55WG motherboard with Windows 10 Home (64-bit)
installed.

The board has an LG DVD optical drive and a WD hard drive (500 GB)
installed. Both are SATA and connected to separate SATA controllers on
the motherboard via their cables.

If I go into the BIOS and change the SATA chipset setting to IDE, I am
able to boot up with the hard drive, but not with the DVD drive. This
even though the HD is SATA.

If I change the chipset to AHCI, I can boot up with the DVD drive but
not with the hard drive.

I thought about flashing the BIOS but Intel no longer offers support for
such an old board. The only other repository of BIOS files I could find
seems to have one that is older than the one currently in use.

If anybody else has run into this issue and was able to solve it, please
let me know.

Thanks.
--
tb

[VanguardLH]

tb <nos...@example.invalid> wrote:

> I have an old Intel DP55WG motherboard with Windows 10 Home (64-bit)
> installed.
>
> The board has an LG DVD optical drive and a WD hard drive (500 GB)
> installed. Both are SATA and connected to separate SATA controllers on
> the motherboard via their cables.
>
> If I go into the BIOS and change the SATA chipset setting to IDE, I am
> able to boot up with the hard drive, but not with the DVD drive. This
> even though the HD is SATA.
>
> If I change the chipset to AHCI, I can boot up with the DVD drive but
> not with the hard drive.

The model of the hard disk? "WD 500" says nothing about the actual
model of the hard disk. If it has jumpers, which pins are shorted?

The model of the optical drive? LG made a lot of DVD drive models. It
also might have pins to jumper them.

[Anssi Saari]

tb <nos...@example.invalid> writes:

> If anybody else has run into this issue and was able to solve it,
> please let me know.

Switching from IDE to AHCI is a fairly common thing to do and the need
for that has been around a long time. I guess ever since AHCI came
out. I think I did that switch back in the XP era.

More recently, same thing with going to NVMe SSD from SATA SSD. Fix in
Windows 10 was the same too, boot Windows to safe mode, then boot to
normal mode.

Now, Windows 10 being what it is, the hardest part of this is actually
booting it into safe mode. You can try to hammer shift-f8 when system
boots but it may not work.

Since you can boot Windows in IDE mode, start from there. Hold shift
while selecting restart from the menu, you get to troubleshooting mode,
select Troubleshoot->Advanced options->Startup Settings->Restart.

System reboots, go to BIOS and change to AHCI, save and exit. System
should boot up into a menu where you can select safe mode. If things
work there, then restarting from safe mode should get you into Windows
10 normally in AHCI mode. If not, back to square one.

[Paul]

You can configure for Safe Mode with a bcdedit command. If your menu has
Powershell, you can type "cmd" into it, to make the responses into
Command Prompt responses.

https://support.thinkcritical.com/kb/articles/switch-windows-10-from-raid-ide-to-ahci

Click the Start Button and type cmd
Right-click the result and select Run as administrator
Type this command and press ENTER:
bcdedit /set {current} safeboot minimal (ALT: bcdedit /set safeboot minimal)
Restart the computer and enter BIOS Setup
Change the SATA Operation mode to AHCI from either IDE or RAID
Save changes and exit Setup and Windows will automatically boot to Safe Mode.
Right-click the Windows Start Menu once more. Choose Command Prompt (Admin).
Type this command and press ENTER:
bcdedit /deletevalue {current} safeboot (ALT: bcdedit /deletevalue safeboot)
Reboot once more and Windows will automatically start with AHCI drivers enabled.

In past Windows 10 editions, you could use "driver re-arming" to prepare
the OS for "sniffing out the new disk storage port mode". But that recipe
was changing from one edition of Windows 10 to the next, so following the
recipe became a nuisance.

Paul