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Modified BIOS for Microserver N40L enables hidden features


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Yeah, glad it worked. The issue of USB flash drive makes & models has come up before. It's really important to find one that boots reliably.

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Good work!  I think we have discussed in this thread as well as some others, to use some brand name USB sticks when doing something like this.  It's a lesson we all learned by trial and error.

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Hey everyone.


Been reading all 17 pages and I've got to ask these two questions to clarify some fuzziness to what I've read so far.


I have an N54L for the past week.

  • Installed the Corsair Force 3, 60 gb, Sata III SSD on Sata 5 on the front of the board. Installed WHS 2011 with JM's Guide, which went perfect.
  • Installed the HP 250 Sata on bay 1, and 2x 2TB Seagates in bays 2-3.
  • Relocated all my files to those drives (350GB)
  • Drive Pool is installed.
  • Working Great.

Wanted to install a USB 3 card and perk up this OS on the SSD as it seems sluggish. That's all I need. No care for boosing eSata.  That's when I read bits and pieces of needing the modded Bios.


OK, so here's my questions:

  1. Bottom line- Since the OS is already installed, will modding the Bios and then changing the Sata setting to 3.0 GB's ruin my current WHS 2011 install?
  2. Will I have to remove all my data from the shared drives and reinstall the WHS OS so the AHCI drivers are installed too at the same time?


Most, not all of the bits and pieces have been discussed, but it's all broken up. There's not a step by step to cover just Sata III enablement portion from start to finish with Dos-Dont's, costs, pitfalls, benefits. To help with those that don't enherently know about AHCI configuration.  So, I thought it best to ask first rather than get into trouble later with a hosed OS.


Pretty experienced with building PC's,modding and WHS V1, but this one's new territory for me. I ain't ascared. ;-)


Thanks, Guys!

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LOL, I had to read your post twice. At first I read it to mean you want to install a USB3 card to boost SSD performance. I went, "say what?" :)


AFAIK, you can flash the mod BIOS and change the onboard SATA port to 3 Gbps without losing anything. IIRC, I flashed the BIOS back and forth a couple of times on the N40L I configured and it still booted OK. Whatever, you do, I really urge you to have plenty of backup.


Joe_Miner, please chime in.

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LOL, I had to read your post twice. At first I read it to mean you want to install a USB3 card to boost SSD performance. I went, "say what?" :)


LOL, I see what you mean by the way I wrote it.


I read 3-4 pages back JMinor mentioned about AHCI drivers need intalled during the OS install or after via a registry hack so it boots again. But, it was convoluted and I could not tell what portion of it was dependant upon the SATA 3gb or the eSata speed up or both.


I figured that flashing the bios and making basic changes would not affect an installed OS. Heck, I've updated many bios', but this ACHI and Sata 3gb switching is new to me and one or both may affect an installed OS.


Yeah, I've got a 2.5 Inch Sata II drive I just plug into the last bay to slurp my measly 350 gb off the WHS. It's how I got it on quickly. ;-)



Edited by judgeschambers
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I have done the AHCI switch after the OS is installed a few times. It's really not hard IMHO.


First, boot WHS2011 normally.


Next, make a change to the registry:




Exit the registry editor.

Reboot and go into the BIOS (do NOT let Windows start!).

Change the SATA setting to AHCI.

Save the settings and boot up.

That should be it (I hope I haven't forgotten anything).


Can anyone else confirm?

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You're spot on as usual.  The only comment I would add is to be very careful in your planning if you are going to use a 60 gig SSD for a server OS.  Sure you "can" do it, but with prices as low as they are, give the OS some room to "breathe" if this is a production machine.

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