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Blog Article 8-17-21: Do You Have A Backup - #4: A Small Interlude
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<blockquote data-quote="MacInWin" data-source="post: 1890325" data-attributes="member: 396914"><p>Patrick, I don't know what the "whole bunch of extra work" you mentioned may be, but consider some scenarios:</p><p></p><p>1. Old Intel Mac. Logic board dies because CPU fails. Clone backup is useless because it won't boot. Solution is to get a new Mac and restore using Migration Assistant (can't do a full clone because new Mac won't run old macOS version anyway). Reboot from internal. </p><p></p><p>2. New M1 Mac. System-on-a-chip fails. Clone backup is useless because it won't boot. Solution is to get a new Mac and restore using Migration Assistant. (This is why AppleCare+ is super valuable now.)</p><p></p><p>I don't see a "whole bunch of extra work" in there. </p><p></p><p>Ah, you argue, what if on an M1 Mac just the storage fails, like a drive failure? Well, in modern Macs the storage is soldered on so pretty much it's the same scenario in that you have to get a new Mac and restore from the clone as in Scenario 1. But let's work with a really old Mac, with a removal drive, either rotating, or blade, or in a box. OK, in those scenarios if the drive itself dies, you can boot from an external while you wait for a replacement to arrive. So, that is scenario 3.</p><p></p><p>3. Old Mac. Replaceable internal drive dies. User can boot from external while ordering a new drive. Drive arrives, open case, take out old one, put in replacement, boot with Option key to get to the external, reformat the new internal drive (they always come formatted for Windows), clone the external to the internal, reboot. You may or may not need to reinstall the OS before the use of Migration Assistant, depending on what version of macOS.</p><p></p><p>All I'm really trying to say is that with an integrated SoC, when the SoC fails, the logic board has to be replaced and while that is happening, a "bootable" clone is pretty much useless. In making a backup plan for a new Mx system, then, you just need to know that the circumstances where a bootable clone has value are limited to those where the internal storage is messed up, but not failed. Just like a bootable clone in an older machine is limited to failures where it's the drive and not the CPU or logic board.</p><p></p><p>The move to SoC is a step forward in technology. Just like moving from tubes to transistors, from individual components to integrated circuits on chips to integrated systems. Now the entire system is on a chip (sort of, it's actually three in a matrix) so the integration is tighter. The advantage is performance, the disadvantage is repairability. You can have performance, efficiency, repairability, pick any two.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1890325, member: 396914"] Patrick, I don't know what the "whole bunch of extra work" you mentioned may be, but consider some scenarios: 1. Old Intel Mac. Logic board dies because CPU fails. Clone backup is useless because it won't boot. Solution is to get a new Mac and restore using Migration Assistant (can't do a full clone because new Mac won't run old macOS version anyway). Reboot from internal. 2. New M1 Mac. System-on-a-chip fails. Clone backup is useless because it won't boot. Solution is to get a new Mac and restore using Migration Assistant. (This is why AppleCare+ is super valuable now.) I don't see a "whole bunch of extra work" in there. Ah, you argue, what if on an M1 Mac just the storage fails, like a drive failure? Well, in modern Macs the storage is soldered on so pretty much it's the same scenario in that you have to get a new Mac and restore from the clone as in Scenario 1. But let's work with a really old Mac, with a removal drive, either rotating, or blade, or in a box. OK, in those scenarios if the drive itself dies, you can boot from an external while you wait for a replacement to arrive. So, that is scenario 3. 3. Old Mac. Replaceable internal drive dies. User can boot from external while ordering a new drive. Drive arrives, open case, take out old one, put in replacement, boot with Option key to get to the external, reformat the new internal drive (they always come formatted for Windows), clone the external to the internal, reboot. You may or may not need to reinstall the OS before the use of Migration Assistant, depending on what version of macOS. All I'm really trying to say is that with an integrated SoC, when the SoC fails, the logic board has to be replaced and while that is happening, a "bootable" clone is pretty much useless. In making a backup plan for a new Mx system, then, you just need to know that the circumstances where a bootable clone has value are limited to those where the internal storage is messed up, but not failed. Just like a bootable clone in an older machine is limited to failures where it's the drive and not the CPU or logic board. The move to SoC is a step forward in technology. Just like moving from tubes to transistors, from individual components to integrated circuits on chips to integrated systems. Now the entire system is on a chip (sort of, it's actually three in a matrix) so the integration is tighter. The advantage is performance, the disadvantage is repairability. You can have performance, efficiency, repairability, pick any two. [/QUOTE]
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