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<blockquote data-quote="pm-r" data-source="post: 1892374" data-attributes="member: 175845">One thing closely related to this topic is what I have discovered with my own 2011 27in iMac, and that one thing that fascinates me is why and how the speed of two of my backup drives work.Of two drives I used with carbon copy cloner, one 2.5&quot; Buffalo HDD is connected via its Thunderbolt 1 connection to the same connection on the iMac, and the other CCC backup Drive is a bare WD Black 3.5&quot; in a Voyager Q dock connected via its firewire 800 port to the same port on the iMac.According to specs and theoretical speeds, for the Firewire connection, I should be getting close to 800 Mb/s for Firewire 800 and as my Thunderbolt 1 has a maximum speed of 10 Gb/s, (10 Gbps = 1250 MB/s)&nbsp; which is a pretty good speed increase, at least according to the books, but in actual practice a very seldom see such a speed increase. I am assuming it is due to the lower spinning speed of the Buffalo Drive.For example, here are two carbon copy cloner clones and the amount of data and the time taken:• WD 3.5: HDD Black in Voyager dock via FW 800:&nbsp; &nbsp;&nbsp; 9.32GB&nbsp;&nbsp; took 9.25 minutes• 2.5&quot; HDD Bufallo via Thunderbolt 1:&nbsp;&nbsp; 9.43GB took 11.54 minutesI am not complaining, but I do not see the theoretical Thunderbolt 1 being much faster than the firewire 800, and in actual fact it is a fair bit slower.But hey I'm retired and over 80 and I've got the time.&nbsp; Just don't let my eyesight get any worse, or the psoriasis rheumatoid arthritis with gout in my hands or my memory worsens.Comments welcome, and it will help keep my brain active sorting out why the difference!!!&nbsp; &nbsp;&nbsp; <img class="smilie smilie--emoji" loading="lazy" alt="😏" title="Smirking face&nbsp; &nbsp; :smirk:" src="https://cdn.jsdelivr.net/joypixels/assets/6.5/png/unicode/64/1f60f.png" data-shortname=":smirk:" />- Patrick=======</blockquote>

[QUOTE="pm-r, post: 1892374, member: 175845"] One thing closely related to this topic is what I have discovered with my own 2011 27in iMac, and that one thing that fascinates me is why and how the speed of two of my backup drives work. Of two drives I used with carbon copy cloner, one 2.5" Buffalo HDD is connected via its Thunderbolt 1 connection to the same connection on the iMac, and the other CCC backup Drive is a bare WD Black 3.5" in a Voyager Q dock connected via its firewire 800 port to the same port on the iMac. According to specs and theoretical speeds, for the Firewire connection, I should be getting close to 800 Mb/s for Firewire 800 and as my Thunderbolt 1 has a maximum speed of 10 Gb/s, (10 Gbps = 1250 MB/s) which is a pretty good speed increase, at least according to the books, but in actual practice a very seldom see such a speed increase. I am assuming it is due to the lower spinning speed of the Buffalo Drive. For example, here are two carbon copy cloner clones and the amount of data and the time taken: • WD 3.5: HDD Black in Voyager dock via FW 800: 9.32GB took 9.25 minutes • 2.5" HDD Bufallo via Thunderbolt 1: 9.43GB took 11.54 minutes I am not complaining, but I do not see the theoretical Thunderbolt 1 being much faster than the firewire 800, and in actual fact it is a fair bit slower. But hey I'm retired and over 80 and I've got the time. Just don't let my eyesight get any worse, or the psoriasis rheumatoid arthritis with gout in my hands or my memory worsens. Comments welcome, and it will help keep my brain active sorting out why the difference!!! 😏 - Patrick ======= [/QUOTE]

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