Missing O.S. (Win7) after storm blackout

Microsoft Windows 7 ultimate 32-bit
January 22, 2010 at 11:57:07
Specs: Windows 7 Ultimate 32-bit

A couple days ago my computer was running (a friend was playing Dragon Age) when the power on my block suddenly went out due to a storm. Upon starting up my computer after power was restored, I kept on getting the "missing operating system" error.

I have deduced that it is caused by a corrupt master boot record after much research. I'm using the following guides to help me out with getting my computer back up and running:
- http://www.faultwire.com/solutions-...
- http://support.microsoft.com/kb/321626

Some things to note about my computer: The OS is currently running on a RAID 0 array of two 250GB Western Digital Caviar SE16 WD2500KS hard drives. Normally when I boot, I can see the nVidia raid utility to check the status of the RAID stripe. With this "missing operating system" error, it simply skips that raid utility which leads me to believe that there is something affecting the RAID setup.

Now before I try replacing the MBR/partition table as suggested on the Faultwire site, I wanted to know if anyone can offer some solutions or suggestions that I can try before attempting to do this. I was kinda dumb and didn't backup for the past month or so, so I'd like to see if I can get past this issue without having to format the HDs.

Thanks for all future help!

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January 22, 2010 at 19:14:14
Might look at a few things.

One is Raid. You should use the raid bios to view array and see if it still shows correctly. You should be able to use a F key at boot to access that feature.Don't make any changes yet. Just see if it is what should be reported. Remember a single disk fail can destroy your whole system on Raid 0.

Windows 7 has a pretty good live boot feature to help determine what is the cause and simple repairs. Windows 7 may or may not need additional drivers to see array. Did you install the system?

Live CD's can look at your system to help get an idea of what is what. Linux such as Fedora live or Mint 8, Barts PE and VistaPE or even a real W7 PE disk can be made. It would help to have tried those disks before this to know if you needed drivers.

Playing to the angels
Les Paul (1915-2009)

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January 22, 2010 at 19:33:09
RAID-0 is typically discouraged on this forum because it offers no fault tolerance & you are likely to end up loosing all your data in the event of a disk corruption or failure in the array.

Since you don't seem to have a disk failure here, I would suggest that you check the BIOS first & see if the array is still the first boot device or if it somehow got reset during the power outage.

Windows 7 News!

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