Request function in block driver

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Operating Systems Linux Ubuntu Request function in block driver
# 1  
Old 06-13-2011
Request function in block driver

How to end the request(I/O) in block driver for particular disk drive without affecting other request intended for some other drives.
# 2  
Old 06-15-2011
Kill the requesting program?

If it's stuck in Driver mode, there's not an elegant way to salvage a hardware or kernel failure.
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