At the tick of 5:44pm, I rebooted my MacBook Pro 1) with the USB memory key attached and 2) while holding the alt/option key down to select a boot drive. I selected the OS X installation partition and opted for the “erase and install” option.

The installation was complete and the system rebooted at 5:53pm. I got through the final setup screens and had the new OS X desktop under my control at 5:54pm. Total time: 10 minutes!

Why was this clean installation so fast? The USB flash memory to SSD flash memory data transfer is much faster than DVD to SSD, and dramatically faster than DVD to spinning HDD.

As a side note, when installing OS X from a flash drive, you don’t have to wait for the standard integrity check of the installation DVD – the verification effort is automatically skipped. I’ve always ditched that step anyway, but for those who allow verification to continue, a good deal of valuable time can be lost. Just another benefit of going all-flash.

There were two things that really sold me on the Corsair P128: the 220MB/s read and 200MB/s write speeds and the 128MB cache. The read/write speeds are near top of the line for SSDs. The Corsair’s 128MB cache is simply staggering compared to the average 8MB or 16MB cache on standard laptop hard drives (16MB cache for the 500GB Seagate).

The P128 is the exact length, height and width as the 500GB Seagate. The P128, however, is much, much lighter.

Here are some simple before and afters:

Here’s the P128 getting mounted in the drive bay:

Dropping from 500GB storage was a bit of a mental hurdle, but I really value speed over size. That’s what external drives are for.

After a few days using the P128, I’m very satisfied. The price still makes me wince, though. Ouch.