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Apple Computing Products:
macOS - Operating System
Perplexing Slowdowns
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<blockquote data-quote="bobtomay" data-source="post: 1585906" data-attributes="member: 24160"><p>What you've already done is how to tell it's a bad drive - making a clone and running from there to compare speeds. </p><p></p><p>I've had multiple drives exhibit exactly the same symptoms over the years - thus far all were being used for Windows. The only ones under warranty I had do this were WD's 1st gen Green drives which all failed exactly in this way and even WD's own drive testing software would report the drive was ok. A single email to WD explaining the symptom was enough for WD to send me an overnight replacement drive - I had 3 of those all die the same death within a week to 2 months after purchase.</p><p></p><p>If you haven't, you could run Disk Repair, but I wouldn't trust a drive once it starts having bad blocks in multiple locations to cause this behavior.</p></blockquote><p></p>
[QUOTE="bobtomay, post: 1585906, member: 24160"] What you've already done is how to tell it's a bad drive - making a clone and running from there to compare speeds. I've had multiple drives exhibit exactly the same symptoms over the years - thus far all were being used for Windows. The only ones under warranty I had do this were WD's 1st gen Green drives which all failed exactly in this way and even WD's own drive testing software would report the drive was ok. A single email to WD explaining the symptom was enough for WD to send me an overnight replacement drive - I had 3 of those all die the same death within a week to 2 months after purchase. If you haven't, you could run Disk Repair, but I wouldn't trust a drive once it starts having bad blocks in multiple locations to cause this behavior. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Perplexing Slowdowns
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