2TB LaCie Bolt: Maxes Out Thunderbolt 3 Bus for Reads, Very Fast Writes, Beats iMac Pro SSD for Reads 1MB and Smaller
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Just arrived late today, the about $1999 LaCie Bolt 2TB SSD is a heavy serious feeling brick of an SSD. It is not something you can fit into a pocket but works great on a desktop and could be easily transported.
With two Thunderbolt 3 ports (and an external power brick), it has the necessary power to be daisy-chained into a Thunderbolt 3 system.
Read speed averages 2670 MiB/sec = 2809 MB/sec, which is about the limit of the Thunderbolt 3 bus.
Write speed averages 1333 MiB/sec = 1398 MB/sec which trounces the SSD in my 2013 Mac Pro.
The Apple iMac Pro 2TB SSD is at last 2X faster on writes than the LaCie Bolt,
However, the LaCie bolt is faster than the iMac Pro for reads all the way through 1MiB reads! Reads tend to be much more important than writes in most all types of computer usage because data is read far more often than it is written (booting up, launching an app searching, all sorts of things like thgat are all about read speed).