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Apple Computing Products:
macOS - Operating System
Internal hard drives don't appear on desktop after restart
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<blockquote data-quote="MarkAllread" data-source="post: 1886230" data-attributes="member: 399743"><p>[USER=408224]@Tuppy[/USER]. I’ve done a little reading about 8TB drives in a Mac Pro and there does seem to be a few issues with some large drives during a restart.</p><p>Randy B. Singer alluded to timing issues in his post which may be related. For example I found a post that says this:</p><p></p><p><em>"In my opinion, many really large disks are seen by their manufacturers as "Server" disks, intended to run 24/7. So the manufacturers have not put any money into the electronic brake that traditionally slows drives down when they are dismounted. </em></p><p><em>I believe that because they have not finished spinning down, they are not ready to spin up again unless you have endured the slightly longer delay of a Shutdown/Restart.”</em></p><p></p><p>One post I read said the problem started when they moved up from Snow Leopard with a large drive.</p><p>Other posts referred to a pin 3 power issue causing boot up issues on specific drives.</p><p></p><p>There seems to be quite a body of knowledge out there that would be worth exploring</p><p>You might want to perform a search for your specific drives being used in your Mac Pro. It may just be as simple as an incompatible drive in a specific version of Mac Pro.</p><p></p><p>[USER=403905]@Horsa[/USER] ’s suggestion is a good one...Nevertheless, it may still be worthwhile first to take 2 out and reformat one (doesn’t need to be a boot drive) and see what happens. If you still can’t see it you might just be faced with using them externally or always having to shut down rather than restart.</p><p></p><p>I wouldn’t go messing with your current boot drive at this point (unless you have a good clone of course. CCC is your friend).</p></blockquote><p></p>
[QUOTE="MarkAllread, post: 1886230, member: 399743"] [USER=408224]@Tuppy[/USER]. I’ve done a little reading about 8TB drives in a Mac Pro and there does seem to be a few issues with some large drives during a restart. Randy B. Singer alluded to timing issues in his post which may be related. For example I found a post that says this: [I]"In my opinion, many really large disks are seen by their manufacturers as "Server" disks, intended to run 24/7. So the manufacturers have not put any money into the electronic brake that traditionally slows drives down when they are dismounted. I believe that because they have not finished spinning down, they are not ready to spin up again unless you have endured the slightly longer delay of a Shutdown/Restart.”[/I] One post I read said the problem started when they moved up from Snow Leopard with a large drive. Other posts referred to a pin 3 power issue causing boot up issues on specific drives. There seems to be quite a body of knowledge out there that would be worth exploring You might want to perform a search for your specific drives being used in your Mac Pro. It may just be as simple as an incompatible drive in a specific version of Mac Pro. [USER=403905]@Horsa[/USER] ’s suggestion is a good one...Nevertheless, it may still be worthwhile first to take 2 out and reformat one (doesn’t need to be a boot drive) and see what happens. If you still can’t see it you might just be faced with using them externally or always having to shut down rather than restart. I wouldn’t go messing with your current boot drive at this point (unless you have a good clone of course. CCC is your friend). [/QUOTE]
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Apple Computing Products:
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Internal hard drives don't appear on desktop after restart
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