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Need PCI ATA controller which will work with 48 bit LBA for 2 very large WD EIDE Drives

Posted on 2009-05-20
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Last Modified: 2012-05-07
Hi - I have two computers an older P2-350 Clone with Windows 2000, and my "upgrade" a used Lenovo ThinkCenter - P4 with Windows XP

I had installed on the old clone two WD EIDE drives (Media1) = 200 GB and (Media2) = 320 GBs
Both of these used the full partition and were working fine with a Promise Ultra100 TX2 PCI card

When I move the Promise Ultra100 TX2 PC! and the two drives to the ThinkCenter with XP
A)   Media1 is recognized as 186 GB, but give write errors associated with LBA drives
B)   Media2 is not recognized at all XP wants me to format with 128 GB

Just to make sure - I returned the drives back to the old clone with Windows 2000
Both drives can be read fine.

So as I have learned XP does not really support 48 bit LBA with out a lot of jumping through hoops.   I have already
A)    Downloaded the latest BIOS for the ThinkCenter (though I am not sure that the BIOS gets involved when the drives are attached directly to tha PCI ATA Controller

B)    Downloaded the newest XP drivers for Promise Ultra100 TX2 from WD website
XP by the way says these drivers are no beter than what it has.   ARGGHHH

What I need is some way to get my perfectly good WD EIDE drives to be recognized by Windows XP

If forced I could probably move the data off the drive to a network share and reformat
but I have no reason to believe that XP will let me use the full capacity for the drives

I don't mind buying another PCI ATA controller card,  if it will work with Windows XP and support my large EIDE drives with 48 bit LBA

Any suggestions - TIA - TOMG

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Question by:Tgilbert
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by:garycase
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The original version of XP does not support 48-bit logical block addressing -- that's probably what you problem is.    Simply upgrade it to SP1 or later (the latest is SP3) and you shouldn't have any problem. Do the upgrade BEFORE you add the additional drives.
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by:Tgilbert
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garycase
Nice Try - I already have SP3 installed - any other ideas?

Is there a problem using the Ultra 100 TX2 with XP ?

TIA - TOMG
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garycase earned 125 total points
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I've used the Promise Ultra133 TX2 on XP with no issues -- works just fine with a 500GB drive.   But the Promise website indicates an Ultra 100 TX2 requires a BIOS update to support 48-bit addressing.   The update is here:  http://www.promise.com/support/download/download2_eng.asp?productID=11&category=all&os=100

Since yours worked okay with 2000, it's likely that you simply need this updated BIOS (for the Promise card -- NOT for the computer) for it to work fine.



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