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[SOLVED] Need some help locating a specific BIOS for an Adaptec AHA-2940U2 OEM SCSI card.

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First post, by Sedrosken

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Hi all,

I have the Adaptec AHA-2940U2 OEM card in my Pentium Pro machine and I have a need for the unofficial v3.10 BIOS for it. The file name is 2940u2w_bios_3100.exe, and I can't find it anywhere, though I did see a hint somewhere that it may have found its way over here at one point back when this was still on a zetafleet domain. I know it says 2940u2w, but I have also read that the 3.10 BIOS has been tested and confirmed working with the 2940U2 OEM despite what Adaptec themselves have to say. I also tried the V2.57.2 BIOS that is still available on MicroSemi's page for it, but that actually does not support the 2940U2 OEM -- it'll flash and detect the drives and even boot from them, but I can't get into the SCSISelect! utility.

Edit: The bare ROM file itself would also work, as I have the flashing utility already: 4u2w3100.rom

Last edited by Sedrosken on 2019-07-31, 04:20. Edited 1 time in total.

Reply 1 of 1, by Sedrosken

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Alright, thanks to some help from a friend of mine, I've got a copy working. I'll attach it here, from there if anyone likes they could push it onwards into the VogonsDrivers Archive. Be warned, it will make a U2 OEM identify as a U2W. As to why I needed it -- the stock OEM BIOS does not properly support high-capacity drives. It saw my 146.8GB ST3146807LC as being 8932MB.

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  • Filename
    2940u2w_bios_3100.zip
    File size
    266.7 KiB
    Downloads
    13 downloads
    File license
    Fair use/fair dealing exception
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