I meant to say if you are not using the ata100 harddrives on the ata100 controllers. If you are using the ata100 controllers to boot into windows you have to alter the boot sequence in the bios. You can still use these controllers for your hard drives but they will be running at ata66

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Same problem for me. Try this link http://www.asus.com.tw/products/motherboard/driver_ide.html

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I have the exact same problem...A7V-133 with an Athlon XP1600+ CPU...everything works great except that it asks me to install that piece of hardware everytime the computer boots...annoying as hell! I tried the above website, but the download (ub106b25.zip) does not exist anymore...download is broken or something. Anybody else have any suggestions??

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My father has the same problem but I think I know what caused it. I installed the operating system(Win 98) on his hard drive while I had the hard drive slaved to another computer with a totally different motherboard. I am going to wipe it and start over but this time while connected to his motherboard. Just thought I would mention it just in case.

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I although have the same problem and I although tried the 4in1 driver which I found on the ASUS page but there is a new problem. For the Asus A7V you get three drivers. 1st and 2nd were no problem but allways when I try to install the 3rd my computer is hangin up compleatly. After I tryed it severel times, I now have got some naw problems. 1st. PCI multimadia audio device 2nd. Secondary IDE controller Is there any body who can help me with these problems. I use Windows ME.

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Im havin the same problem with my compaq. Should I just go to the compaq website and look for the driver there?

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I'm also here with the same problem Gigabyte GA_6RX m/b win98 - have yet to get this sorted

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i have the asus A7V 133 motherboard also, and had the same problem. this is what i did: 1. Go to device manager 2. go to pci mass storage listed under "other devices" 3. under the general tab, click on install driver 4. follow the instructions to re-install driver. (the driver location is in the asus cd in the PROMISE folder. the path is: {cd-rom driver} :\Promise\Ata100\Win95-98 if for some odd reason the path does not work, just do the browse button and locate the "promise" folder, then click "ata 100", then click "win95-98" let me know how this works.............

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Great advice Daniel, it worked for me ! Thanks !!!!!!!!!!!!!!

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Nice one Daniel worked for me too, seems you have to be an Einstein to setup a pc these days hehe

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You guys are lucky to have located this PCI Mass Controller. I cant find it anywhere on my Device Manager. The problem with my computer is that it keeps crushing. I am using an ABIT BW7 RAID MotherBoard For A P4 1.9GHz. I formatted my hard drive and reinstalled the operation software(Windows 98). But i still can't this PCI Mass Storage Controller anywhere. I'm quite sure my system keeps crushing because of this cos i need to find it so i can install the drivers for the motherboard. CAN ANYONE OUT THERE HELP ME FIND THIS PCI MASS STORAGE CONTROLLER!!!!!!!!

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Has anyone else had any trouble with random system freezes due to the lack of driver for mass storage controller? Am also running athlon 1 gig w/a7v 133 motherboard?

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I have a PCI Mass Storage Controller problem too, .. but it is a CUV4X Asus motherboard and windows 98SE. In device manager, I have the controller listed TWICE under Other Devices ... each w/ a ? and a !. If I delete them, on next boot, they install again. If I update any one of them, nothing is found on the Asus CD ... anywhere ... not under the Promise folder even. I have spent DAYS and NIGHTS trying to find a driver. The Asus website has TONS of possibilities, ...poorly presented, ... and I have tried everything that seems even remotely like what would do the trick. System seems to run fine, .. and as long as these are there, hardware wiz does not run on boot, but delete 'em, .. and it does, and gives 'em back. I know this is not right. I would SURE like to resolve this. I emailed Asus support ... no response. If anyone has a clue, ... I would appreciate an email ... cause I found this site on Google and don't know if it notifies or not. THANX!!!! JB

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thanks daniel for the info, finally my pci mass controller has a driver...computers are so stupid...if it weren't for man i dont know. i simply put in the asus mb cd and hit browse to locate promise/ata100/win98 and it worked!!! thanx

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just wanna say a big thanx to daniel and , first of all, to richard, who led me to this site!!!! finally my pci mass storage controller is not listed under "other devices" anymore! Thanx a lot!!!

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Thanks Dan !!! Let me be the first to have your children.

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The answer could have quite easily been found if you've just used Google put this line on search: "pci mass storage" driver The problem seems to be solved for most of you already, but just keep the too-simple-sounding -answer Google in your mind if you need a driver or particularly anything. ;)

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I have the same problem, i can't find the PCI MASS STORAGE CONTROLLER I have an Soyo 6BA+IV and a pentium 2 550mhz. What can i do about this problem? Can anyone help me out? thanks

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Just a note to tell you i'm also using an AMD processor, and experienced the same problems. I got an Abit KT-1.32M board. I just installed the driver on the Abit CD enclosed in the box, and thank god everything works perfectly now. I guess 'having problems' is a price to pay if you are to save money on your computer (by not buying overpriced Intel stuff).

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Same prob here with A7V motherboard. I Also was led to believe it was the ultra100 so I downloaded the drivers from Promise, which includes multiple OS's. I'm using ME and those drivers are included. The PCI Mass Storage Controller shows up in the other section in the device manager, so I tried reinstalling the driver...browsed to the correct folder, and it's not wanting to see it there. I've tried both ME and 95/98 sets of drivers. Each time it just says no drivers were found. I don't have the original ASUS system CD since I bought my PC from a friend. AMD Athlon 900 A7V MB

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PCI Mass Storage Controller Driver is showing up here with the yellow exclaimation point.

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Thanks Daniel. Your instructions were good and the driver was sucessfully installed. I have found ASUS tech support to be totally unresponsive. My next MB will NOT be ASUS.

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Mark Did you get the drivers from here?http://cgi.asus.com.tw/cgi-bin/dl.asp?filename=misc/ide/v160b33.zip I tried and seems to have worked. I will test tomorrow.

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A7V mobo again,Thanks for the advice although strangely i now seem to have a SCSI driver for pci mass storage controller. comp now more resonsive and has stopped crashing and freezing frequently(so far so good).

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My problem is that the computer runs very slow and locks up. In the device manager, I find the PCI Mass Storage Controller under Other Devices. It has a large question mark over it and a yellow and black exclamation mark over the question mark. No other entry in the device manager looks like this. When I check properties, it says that no driver is installed. I've tried reinstalling the driver from the hard disc and the Windows 98 CD-ROM without success. This problem may have coincided with installation of a SIIG USB 2.0 PCI card, but I'm not sure. At any rate, the floppy that contains the driver for the SIIG PCI card does not have a driver for the Mass Storage Controller. The SIIG card is working fine. The manufacturer and other properties of the Mass Storage Controller is not specified. Under the Performance tab of the System Properties display, I get the messages "Compatibility mode paging reduces overall system performance" and "Drive C is using MS-DOS compatibility mode filing system" I assume these messages are related to lack of the proper driver. At least I can't find another cause. What does this driver do? Can I remove it without detrimental effect. My computer is a Dell Dimension XPS T600 with a 450mh Pentium 2 processor running Windows 98. It is about 2 years old. Thanks for whatever help I get.

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I found the file u106b25.zip on the amdworld website and downloaded but my PSI mass storage controller doesn't recognize it as the driver, even when directed to look in the file that where it lives. I guess my controller needs a different driver. Also, my computer runs on a Pentium 3 (not 2 as I said above)

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My pci mass controller seems to work fine, i have installed 4in1 driver and promis driver to hope the stupid text "Ata 100 bios driver not intstalled" in bootup disappear, but I can't.I can either not connect my harddrive to ata 100 while the text comes in bootup.... does anyone can help me ? write to my mail bmw007@ofir.dk

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I agree with several here, I will never buy an ASUS mobo again because of the A7V. I have sent email after email, no reesponse. I have tried calling. Etc etc. There site sucks. It's a confusing, unorganized tangle. Their A7V manual leaves out critical info. Yet Leo Leport on Screensavers was hyping the A7V!

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I'm getting very similar problems to you guys. In my Other devices category, My PCI Mass Storage Controller had a yellow exclamation next to it, and stated that there were no drivers loaded for that device. So I went to Gateway techsupport and they said to remove it, reboot, and windows would reinstall the driver. Hah! So now I'm looking for an appropriate driver. The problem is, I have a different motherboard. Here are my system's specs: Athlon 1 GHz Jabil (Kadoka) motherboard Running Windows ME I tried looking for drivers on Jabil's website... they dont even have a support section. I went back to Gateway techsupport and they had me download some drivers for my motherboard... Im kinda scared to use them though. Well, we'll se what happens.

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I have the same problem as ChainMael. I can remove the PCI Mass Controller from the Device Manager menu and reboot, but the computer doesn't find a driver either on the hard disc, or the Windows 98 program disc that came with the computer (or several others I've tried). I don't know what kind of motherboard I have, so I don't know where to start looking (Computer is a Dell Dimension).

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SAME problem here. Just bought an ASUS A7V266-E w/ 512MB DDR, Athlon XP 2000+. Was running WinMe, but after upgrade, had to resort to Win98SE. Continually get the 'PCI Mass Storage Device' error/cannot find driver message and system tends to freeze up randomly and seems very unstable. I am running 2 WDC 30GB HDD in the Promise IDE slots using ATA100/Ultra100. They are detected fine. But, because of the elusive PCI Mass Storage Device driver not being found despite downloading every possible driver and solution I could get my hands on, both HDD are running in MS-DOS compatibility mode. I did not get a CD from ASUS with drivers, but downloaded them from their web site(s). If someone could send me a driver file (or direct me in the right direction to download it for myself) that has solved this very annoying problem for them, I would be VERY appreciative!

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