[GTALUG] Build critique request and the story behind it.

Lennart Sorensen lsorense at csclub.uwaterloo.ca
Mon Nov 20 11:13:00 EST 2017


On Sun, Nov 19, 2017 at 01:18:00PM -0500, D. Hugh Redelmeier via talk wrote:
> | From: Russell via talk <talk at gtalug.org>
> 
> I seem to be good at giving too-late advice.
> 
> The coming thing in SSDs is NVMe.
>   <https://en.wikipedia.org/wiki/NVM_Express>
> 
> These live directly on the PCI bus and thus get rid of the SATA
> bottleneck.  But most current SSDs aren't significantly bottlenecked
> by SATA.
> 
> You need OS support (in Linux for 5 years but improved more recently)
> and hardware support (prehaps only firmware for booting from NVMe).  I
> bet that your motherboard, chipset, and CPU chip support NVMe.
> 
> NVMe SSDs cost more than SSDs with SATA, mSATA, and m.2 connectors.
> 
> I don't think that any of my machines supports NVMe.

Some NVMe come as m.2 modules.  The board being looked at certainly
supports m.2 NVMe modules.

For example the Samsung 960 EVO M.2.  Those things are fast and go
significantly faster than any SATA port could do.  A 4x PCIe 3.0
connection gives a lot more bandwidth than a single SATA link, and NVMe
avoids the SATA protocol overhead too.

-- 
Len Sorensen


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