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Discussion Starter #1
Dual boot - Win2K pro/XP pro
Primary master - WD 80 GB (OS disk)
Primary slave - Maxtor 40 GB (pure data, no OS)

Just yesterday everything worked fine. Today, when I booted into my computer using XP pro, my primary slave HDD went missing. Rescan with DISKPART.EXE, sees only one disk - the primary master.

I have a dual boot system. So I booted into the same machine using Win2000 pro, my primary slave is there and healthy.

The BIOS sees them OK.

So, I swapped the 40 GB HDD with another old HDD (6 GB), set to slave of course. Boot Win2000, everything worked fine. Boot XP, slave still missing. So, all of a sudden, My XP can't see any second HDD but the primary master.

My BOOT.INI -
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(2)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microsoft Windows 2000 Professional" /fastdetect

What could have gone wrong? Does anyone have the same problem. Please help.
 

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you download anything recently? use windows update and install anything under other hardware?

do you know how to open disk administator within XP? would be a good idea to check both that and device manager to see what the status is... You need to find out if XP actually sees the drive regardless of drive letter. Some dual boot systems will hide a partition while booting the other. Since this is a second drive and non OS partition, this is highly unlikely. I saw your bootloader and see that your dual boot is set correctly. partition one and two are your operating systems. let us know what you come up with. if you find anything like unknown device, etc let us know that too and also post your computer brand and model or if a custom made one, post your motherboard and model. by chance are these drives sharing the same cable? looking at all possible scenarios...

These drives are under the 137gb cap so the service packs aren't a necessity, but if you are not running SP2 on XP, I suggest you download and install it.
 

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I have Service Pack 2 installed. Both HDD's are on the same cable jumpered to master and slave respectively. Since Win2000 worked fine, intuition tells me to rule out hardware issues.

Your suggestion clicked. The fact that I used DISKPART.EXE to rescan doesn't mean I have exhausted all possible means to get XP to recognize my HDD. So I used Computer Management (Start->Computer->right-click->Manage). Then select Device Manager and choose Action->Scan for hardware changes from the menu. Now XP found my second HDD successfully. I restarted the system only to find my XP failed to see the slave HDD again. So I went to Device Manager again, scan for hardware changes one more time, then uninstalled the second HDD once found (in Device Manager, choose Disk Drives then right-click the HDD and choose uninstall). Then scan for hardware changes again. This is the procedure to reinstall any plug-and-play device. Then restart the system. Voila, my slave HDD is there on logging-in.

I guess sometimes you just need to reinstall plug-and-play device when the the system go haywire.

Thanks for advice.
 

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Hi,

It's good that you posted how you fixed it, this should help people in future who come across this page. It seems the problem you had was a resource, IRQ (Interrupt Request Line) or DMA (Direct Memory Access) conflict. Glad to hear it's fixed now.

Nick.
 

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That's great news. Now you can get the technical joke we've been using for years. What is another name for plug n play?

Plug and Pray!

Anyone remember When Bill Gates was introducing how awesome plug n play was in his demo of Win98? It subsequently crashed in front of the entire audience!
 
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