dikkiedirk Posted September 29, 2012 Share Posted September 29, 2012 Is this a safe procedure: http://www.supermicro.com/support/faqs/faq.cfm?faq=14720. Can anyone confirm this? Quote Link to comment
BobPhoenix Posted September 29, 2012 Share Posted September 29, 2012 I can't tell you if that is safe or not because that is NOT the process I tried. I can tell you what I tried will BRICK your board so do NOT follow it. I just took the 1.0C zip file I found and unzipped it to a bootable USB stick and used the ami.bat file to flash the bios. When I look at the command contained within the ami.bat file it looks like this: AFUDOSU.EXE %1 /P /B /N /R When I look at the instructions you found they have an extra option "/K" which is suppose to be: "/K - Program all non-critical blocks or ROM Holes" So it should do more than what I did. It is in the knowledge base and is listed as the correct procedure to downgrade so I would think it would work. If you try it and have good results let me know because I have one board I need to downgrade and another I may need-to once I try to recover it with the recovery procedure. I don't have a processor right now to load on my board or I would try it for you since my X9SCM-F is currently not being used. Quote Link to comment
Ford Prefect Posted September 29, 2012 Share Posted September 29, 2012 ...also, as far as I understand it, the only way you can attempt to perform a downgrade is with a SandyBridge CPU, and NOT with a IvyBridge CPU ! Quote Link to comment
BobPhoenix Posted September 29, 2012 Share Posted September 29, 2012 ...also, as far as I understand it, the only way you can attempt to perform a downgrade is with a SandyBridge CPU, and NOT with a IvyBridge CPU ! Correct. Ivy Bridge support is only in 2.0 so if you have that CPU you CAN'T downgrade the bios from 2.0. If you have a Sandy Bridge CPU you should be able to go to 1.0 or 1.1. Quote Link to comment
moose Posted September 29, 2012 Share Posted September 29, 2012 I can confirm that this process works. I just successfully downgraded my x9scm-f from bios v2.0a to bios v1.1a. The command to downgrade to from v2.0a to v1.1a bios is "afudosu x9scm1.928 /p /b /n /r /k /fdt /mer /opr". Note that the "x9scm1.928" text is the v1.1a ROM file. The Supermicro instructions (link in OP) omit the ROM file in the command. I appended the "/fdt /mer /op" at the end of the command line since I was unsure if I should run the second step without the other options "/p /b /n /r /k". Quote Link to comment
dikkiedirk Posted September 30, 2012 Author Share Posted September 30, 2012 I can confirm that this process works. I just successfully downgraded my x9scm-f from bios v2.0a to bios v1.1a. The command to downgrade to from v2.0a to v1.1a bios is "afudosu x9scm1.928 /p /b /n /r /k /fdt /mer /opr". Note that the "x9scm1.928" text is the v1.1a ROM file. The Supermicro instructions (link in OP) omit the ROM file in the command. I appended the "/fdt /mer /op" at the end of the command line since I was unsure if I should run the second step without the other options "/p /b /n /r /k". Why did you downgrade? Did you have any problems running unraid or ESXi? Quote Link to comment
moose Posted September 30, 2012 Share Posted September 30, 2012 I downgraded to see if going from v2.0a to v1.1a would correct the slow write speed I am having with the X9SCM-F and v5.0-rc8a. With testing I suspected the X9SCM-F bios was corrupt. I reinstalled v2.0a but no change, so I wanted to see if downgrading to v1.1a would make any difference...it didn't. I eventually plan to use EXSi on this server, but wanted to verify that I had v5.0-rc8a correctly running on this motherboard outside of EXSi first. FYI - This thread summaries the slow read speed I'm having with the X9SCM-F and v5.0-rc8a: http://lime-technology.com/forum/index.php?topic=22675.0 Quote Link to comment
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