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I just went through the relatively painless "fix" process, and I thought there might be some folks here who might have the same disk drive might not have been as lucky as I to have stumbled across the article.
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I just got done rebuilding the system and getting all my apps and data back to where they belong, and then happened to stumble upon a tech article that mentioned the very disk drive I'd bought. Works like a charm, I'm very happy with it so far. Though I had the option of calling in a replacement Winchester disk on my Sony service plan, instead I just bought a Samsung 840 EVO solid state drive to replace it, so I can feel safer about taking this laptop on the road with me. But I decided that I wanted to avoid the problem ever happening again. All my important data was already backed up in multiple locations. Luckily, I'm religious about backups, and lost only a tiny bit of unimportant work. The head crash was so bad that the BIOS refused to even recognize there was a disk drive present at all, let alone be able to boot it or recover data off of it. Though the computer is protected against gravity drops, that same sensor doesn't help if you directly thwack the disk while it's actively reading or writing data. The capo landed on the K key which is more or less right exactly atop the hard disk. I recently destroyed the hard disk in my new laptop by dropping a guitar capo onto its keyboard during a filk circle.
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