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Apple Computing Products:
macOS - Operating System
Time Machine couldn't complete backup.
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<blockquote data-quote="MacInWin" data-source="post: 1946097" data-attributes="member: 396914"><p>I never set drives to sleep. What happens is that when the OS wants access, it sends the request to the drive. If it's a rotating drive, it doesn't respond until the drive reaches full speed and can report ready. Unfortunately, that can take longer than the OS allows, so the OS moves on and flags that drive as "unavailable" to use. And that action can trigger all sorts of anomalies.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1946097, member: 396914"] I never set drives to sleep. What happens is that when the OS wants access, it sends the request to the drive. If it's a rotating drive, it doesn't respond until the drive reaches full speed and can report ready. Unfortunately, that can take longer than the OS allows, so the OS moves on and flags that drive as "unavailable" to use. And that action can trigger all sorts of anomalies. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Time Machine couldn't complete backup.
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