i have 2 hard drive in my pc . out of 2 one 80gb hd divided in to 2 part namely e and f i.e 40gb each as a storage media. now my e drive showing that the drive need to be formatted but while formatting it the drive shows that it cannot be formatted. i tried for test disk but after a test disk run the drive e missing from my computer but it is showing in disk management as unallocated.
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The drive might be failing. I would replace it immediately before you lose the F: drive also.