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I accidentally formatted my OEM drive of M DELL Inspiron. After that I could not install Windows 7 on my laptop. Because the partitions of my hard disk are not showing to select an install drive. I downloaded the RAID driver from the Dell Support website for my laptop, but the driver is showing and I loaded the driver from a pen drive. But it's still not showing the drives.

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migrated from Oct 24 '09 at 15:04

This question came from our site for system and network administrators.

Is the hard drive showing up in Windows 7 install, with no partitions? If so, create partitions in Windows 7 install. Or, is the hard drive not showing up at all? If so, the issue is not partitions. Something else is wrong, likely in the BIOS, or H/W has failed. – kmarsh Feb 4 '10 at 13:14

Try this, in the BIOS try changing the SATA mode. Its probably in Native and can be changed to Disabled, setup should see it like a normal drive (Not as a RAID drive)

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Or, change SATA mode to IDE mode, depends on the BIOS. – CoffeeBean Oct 24 '09 at 21:38

Try to use Hiren 9.x CD , go to the partition manager section > Smart Partition tool . delete any none FAT-NTFS drive if you have , and then create a drive with NTFS/FAT format. now you are ready to install windows 7

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This isn't going to help. The OP stated that the drives are not detected at all. – MDMarra Oct 24 '09 at 15:19

Look for an AHCI driver, not a RAID driver. That should do it hopefully.

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