Side by side on my piano keyboard...
An analyst for Objective Analysis claims that PCIe and
standard interface SSDs technology will work together for a long time.
Many others claim that SSDs will replace PCIe as soon as
the price drops but Jim Handy told
Digitimes there is a lot of life in the old hard-drives yet. He said that NAND-on-the-motherboard is a technology that
will happen in time, and when it does it will certainly reduce the penetration
of SSDs into PCs, but it is not presently clear when that will happen.
Handy said that this is a miniature version of the way
that SSDs are being used in the enterprise with a small, cheap amount of solid
state storage for everything that needs to be fast, and inexpensive HDD
capacity for everything else. SSDs make most sense in systems with numerous HDDs where
fast drives are used to store some data, but the vast majority of data is
stored in inexpensive capacity HDDs. He said that SSDs are a very economical alternative to
fast HDDs in these systems and often provide higher performance than the enterprise
HDDs they replace.
He added that PCIe is a much faster way to communicate
with the CPU than are standard disk interfaces. HBAs and RAID controllers
already take advantage of this and are in widespread use. A PCIe SSD is not
really replacing an enterprise HDD as much as it is replacing an HBA or RAID
controller with a number of HDDs. PCIe SSDs will continue to be very popular
but will not displace SSDs that have conventional HDD interfaces. Both PCIe and
standard interface SSDs should coexist for a very long time.