(I wrote this horrible thing)<p>It&#x27;s pretty horrendously bad on spinning rust - you get very, very close to 100% fragmentation, so the disk has to seek for each cluster. A lower bound average on seek time is probably something like 4ms, so your max transfer rate is going to be limited to 125 * cluster size. Depending on the disk size[0] the cluster size may be up to 32KB, so we&#x27;re looking at maybe 4MB&#x2F;sec best case. I&#x27;d guesstimate it&#x27;d increase boot time by somewhere between 10x and 40x.<p>0. <a href="https:&#x2F;&#x2F;support.microsoft.com&#x2F;en-us&#x2F;kb&#x2F;140365" rel="nofollow">https:&#x2F;&#x2F;support.microsoft.com&#x2F;en-us&#x2F;kb&#x2F;140365</a>